Date   

winkeyer anomoly

g0ifl
 

Hi,

I made up the WinkeyerUSB kit and all seems to be working ok ...except...when it keys the K3 I just get a single tone. I am now stumped! Any guidance gratefully accepted.


Re: New KPA1500 feature: ATU TUNE integration with K3 and K3S transceivers

Mark Mark
 

This will be a very well-received feature of the KPA-1500's tuner. Thank you, to all who participated in getting this feature incorporated. Not an easy task.   Likewise with the newly adapted cooling system.  

Looking forward to trying it all out - - as soon as it arrives  : ))  

Also looking forward to reading an early release of the KPA-1500 final draft (recent) manual, if that's at all possible, to bone up on the amp's operations well ahead of the amp's arrival here, this in order to better prepare for the late-January DX'expedition of the decade (Bouvet Island).

In that same regard, another most welcome feature on the KPA-1500, as I understand it, is some sort of integrated control for the two antenna SO-239 antenna ports with an accessory (user supplied) external coax switch, which, if I understand correctly, will allow programmable, auto connection to more than two antennas, based on the operator's needs.  Hopefully, an early release of the manual will have all the particulars, so we users can acquire what's needed beforehand.



Final Reminder: Y-BOX Sale ends tonight at Midnight Pacific Time

Bob Wilson, N6TV
 

Regular price $139 ea., New Year special price, only $129 ea. if you order by the end of today.

For photos, see https://bit.ly/Y-BOX .

This special is for the original Y-BOX (only), which requires a M/F Elecraft KPAK3AUX cable (P/N E850463, not supplied) to connect a KAT500, KPA500, or KPA1500.

I've also started a waiting list for the new Y-BOX, announced below  It has a new Key Line Interrupt connection option just for SteppIR owners, and a new connection option to power on your KPA500 or KPA1500 via a K3 macro.  This new version can be connected directly to a KAT500, KPA500, or KPA1500 using any standard M/F cable with all 15 pins wired (but not a VGA cable); there's no need for the custom KPAK3AUX cable (though it will work fine too, but you won't be able to power on the KPA500 or KPA1500 with a macro if using that cable).

Direct link to Order Form / Waiting List:  https://goo.gl/forms/Guu6OC6NinTlasY93

Please indicate in the comments which version you want:  original or new.  Price of new version will be $139 ea. if there is sufficient demand, otherwise $149 ea. due to board costs.  The new model will be be ready to ship before February 1st, 2018.

Amphenol M/M cables and M/F extension cables with all 15 pins wired are also available for purchase with your order of a Y-BOX.  Cables are not sold separately unless you previously purchased a Y-BOX from me.

Happy New Year!

73,
Bob, N6TV

On Sat, Dec 30, 2017 at 4:59 PM, Bob Wilson, N6TV <n6tv@...> wrote:
In honor of the New Year, all Y-BOX orders received before midnight Pacific Time New Years Day (by 2018-01-02 08:00 UTC) will get $10 off each unit, while supplies last.  This applies to the original model only, with all 15 pins of the K3 ACC connector wired in parallel to all five DE-15 connectors.  I only have about a dozen of these original units left, and this will be the end of the production run.  However, a new version is being developed (see below), and I'm starting a waiting list for that now.

(The Y-BOX is a 4-way passive splitter and breakout box for the 15-pin Elecraft K3 and K3S ACC / AUX port.  See https://bit.ly/Y-BOX .)

The original Y-BOX requires a KPAK3AUX cable (P/N E850463) between the Y-BOX and a KAT500, KPA500, or KPA1500.  This cable has one male and one female (M/F) DE-15 connector, with no connection on five of the pins, as required by the amp.  The original Elecraft cables were bulky monitor cables that had five pins cut. That was much improved more recently.

The NEW Y-BOX will provide the same function as the Elecraft AUX cable.  ONE of the DE-15 connectors marked "AMP AUX" will have no connection on those 5 pins.  This means you can use a stock $10 M/F DE-15 cable with all 15 lines wired (NOT a VGA cable) between the Y-BOX and a KAT500 or KPA500, and you can also use the same cable between the KAT500 and the KPA500.  Of course you may still use the $24.95 Elecraft AUX cables on any of the DE-15 connectors if you already have them.

Attention SteppIR owners:

The Elecraft manuals recommend using a "Key Line Interrupter" to open the KEY OUT line in the AUX cable (pin 10).  Then the SteppIR SDA100 controller with the Tuning relay option, or the N8LP SteppIR Tuning Relay is placed in between the K3's KEY OUT phono connector, and the KPA500 KEY IN phono connector, opening the KEY line while the SteppIR is tuning, to prevent high power from damaging the SteppIR.

The NEW Y-BOX will have a Key Line Interrupt jumper built-in, optionally splitting the amp KEY line (pin 10 of the AUX cable) into two RCA connectors labeled KEY IN and KEY OUT.  Then you can conveniently connect your "normally closed" SteppIR Tuning Relay to those RCA jacks.  With this arrangement, you just need ONE DE-15 cable between the Y-BOX and the KAT500 / KPA500 / KPA1500, and ONE stereo phono cable from the tuning relay to the Y-BOX.  You no longer need to connect RCA cables from K3 KEY OUT and AMP KEY IN..

Attention K3-REMOTE users (K3/0-Mini and K3/0):

"But there's one more thing ..." -- Steve Jobs

The NEW Y-BOX with a $10 cable can do one more thing that the stock Elecraft AUX cable cannot:  it provides an internal jumper connection to the amplifier's Pin 8 (PWR ON), a pin which has no connection in the Elecraft cable.  You can then use a simple K3 macro to power up the KPA500 or KPA1500 remotely.  No PC required, no relay required.   The macro is described on Page 21 of the K3 Remote Owner's Manual.   It generates a pulse on DIGOUT1 (Pin 11) to power up the amp.  This will not work with the stock Elecraft AUX cable, but works fine with a M/F DE-15 cable from the Y-BOX to the amp. if the internal jumper is connected.

To review, order the original Y-BOX any time before midnight PT this Monday to receive the one-time $10 discount on each unit, while supplies last, or indicate in the notes if you prefer to be put on the waiting list for one of the new units with the dedicated connections for Elecraft Remote, SteppIR, KAT500 / KPA500 / KPA1500.  M/F Amphenol DE-15 cables in both 2.5 ft and 5 ft lengths are now available to order too, but these only work with the new Y-BOX, or between KAT500 and KPA500.  Cables are not sold separately unless you have previously purchased a Y-BOX from me.

Direct link to Order Form / Waiting List:  https://goo.gl/forms/Guu6OC6NinTlasY93

Thanks for all your support of my little project over the last year, and Happy New Year to all!



Re: [Elecraft_K3] K3 utility on linux mint 18.3 64bit

David Fleming
 

Hi Eldon,

Mint includes most of the necessary libraries. You'll need to install 32-bit GTK+ 3 and webkit with this command :
sudo apt-get install libgtk-3-0:i386 libwebkitgtk-3.0-0:i386
That should be all that's necessary on Mint 18.3. But if it still refuses to run, try these commands also:
sudo dpkg --add-architecture i386
sudo apt-get update
sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386 libglib2.0-0:i386 libsoup2.4-1:i386 

Regards,

David, W4SMT

On Sunday, December 31, 2017, 8:06:49 PM EST, skip4450@... [Elecraft_K3] wrote:


 

anyone figured out how to make the K3 utility work on 64 bit linux mint 18.3. It don't seem seem to have the 32 bit libraries.
Eldon
w0szv



K3 utility on linux mint 18.3 64bit

Eldon Scott <W0SZV>
 

anyone figured out how to make the K3 utility work on 64 bit linux mint 18.3. It don't seem seem to have the 32 bit libraries.
Eldon
w0szv



K3s with K144XV - Intermittent power out on 144 Mhz - with workaround

matt421
 

I thought I would share this with the group to hopefully save others an annoyance.


Issue: About 5% of the time when transmitting, the power output from the K3s on 2 meters is very low (around 1.2 watts). It will stay there until you just touch the power output control and change by a tiny bit, the power jumps up to full and stays there for the next 10 or 15 transmissions. Then another low output, tweak knob, repeat. 

I did find a work around. I noticed that I was only getting a max of 8 Watts out of the K144XV. I set menu option XV1 PWR to L 1.50 (instead of the recommended 1.0 shown on page 17 of the K144XV manual rev E1). This results in a stable output power from the K144XV now of 8 Watts. Concerned I may be overdriving the K144XV, I adjusted R87 (TX Gain) inside the K144XV to back the power down to about 5 watts (this is also a good drive level for my external amp). Power out from the K144XV now is 5 Watts 95% of the time. The other 5% is starts at 3 Watts and gently climbs to 5 Watts after a few seconds. Good enough. 

Hope this helps.
73
Matt
N2IDW




Re: wsjt-x

Alex OE3JTB
 

HI I did an upgrade to the last version from former RC1 and I cant get a CAT connection
Uninstall and even deleted in registry, nothing helps, returned to RC1 and now everything is working as before,,,
Scary...
73 Alex


---In Elecraft_K3@..., <k8zt@...> wrote :


--
Anthony Luscre



Y-BOX New Years Day Sale + Announcing New Version for KAT500 / KPA500 / KPA1500 / SteppIR Owners

Bob Wilson, N6TV
 

In honor of the New Year, all Y-BOX orders received before midnight Pacific Time New Years Day (by 2018-01-02 08:00 UTC) will get $10 off each unit, while supplies last.  This applies to the original model only, with all 15 pins of the K3 ACC connector wired in parallel to all five DE-15 connectors.  I only have about a dozen of these original units left, and this will be the end of the production run.  However, a new version is being developed (see below), and I'm starting a waiting list for that now.

(The Y-BOX is a 4-way passive splitter and breakout box for the 15-pin Elecraft K3 and K3S ACC / AUX port.  See https://bit.ly/Y-BOX .)

The original Y-BOX requires a KPAK3AUX cable (P/N E850463) between the Y-BOX and a KAT500, KPA500, or KPA1500.  This cable has one male and one female (M/F) DE-15 connector, with no connection on five of the pins, as required by the amp.  The original Elecraft cables were bulky monitor cables that had five pins cut. That was much improved more recently.

The NEW Y-BOX will provide the same function as the Elecraft AUX cable.  ONE of the DE-15 connectors marked "AMP AUX" will have no connection on those 5 pins.  This means you can use a stock $10 M/F DE-15 cable with all 15 lines wired (NOT a VGA cable) between the Y-BOX and a KAT500 or KPA500, and you can also use the same cable between the KAT500 and the KPA500.  Of course you may still use the $24.95 Elecraft AUX cables on any of the DE-15 connectors if you already have them.

Attention SteppIR owners:

The Elecraft manuals recommend using a "Key Line Interrupter" to open the KEY OUT line in the AUX cable (pin 10).  Then the SteppIR SDA100 controller with the Tuning relay option, or the N8LP SteppIR Tuning Relay is placed in between the K3's KEY OUT phono connector, and the KPA500 KEY IN phono connector, opening the KEY line while the SteppIR is tuning, to prevent high power from damaging the SteppIR.

The NEW Y-BOX will have a Key Line Interrupt jumper built-in, optionally splitting the amp KEY line (pin 10 of the AUX cable) into two RCA connectors labeled KEY IN and KEY OUT.  Then you can conveniently connect your "normally closed" SteppIR Tuning Relay to those RCA jacks.  With this arrangement, you just need ONE DE-15 cable between the Y-BOX and the KAT500 / KPA500 / KPA1500, and ONE stereo phono cable from the tuning relay to the Y-BOX.  You no longer need to connect RCA cables from K3 KEY OUT and AMP KEY IN.

Attention K3-REMOTE users (K3/0-Mini and K3/0):

"But there's one more thing ..." -- Steve Jobs

The NEW Y-BOX with a $10 cable can do one more thing that the stock Elecraft AUX cable cannot:  it provides an internal jumper connection to the amplifier's Pin 8 (PWR ON), a pin which has no connection in the Elecraft cable.  You can then use a simple K3 macro to power up the KPA500 or KPA1500 remotely.  No PC required, no relay required.   The macro is described on Page 21 of the K3 Remote Owner's Manual.   It generates a pulse on DIGOUT1 (Pin 11) to power up the amp.  This will not work with the stock Elecraft AUX cable, but works fine with a M/F DE-15 cable from the Y-BOX to the amp. if the internal jumper is connected.

To review, order the original Y-BOX any time before midnight PT this Monday to receive the one-time $10 discount on each unit, while supplies last, or indicate in the notes if you prefer to be put on the waiting list for one of the new units with the dedicated connections for Elecraft Remote, SteppIR, KAT500 / KPA500 / KPA1500.  M/F Amphenol DE-15 cables in both 2.5 ft and 5 ft lengths are now available to order too, but these only work with the new Y-BOX, or between KAT500 and KPA500.  Cables are not sold separately unless you have previously purchased a Y-BOX from me.

Direct link to Order Form / Waiting List:  https://goo.gl/forms/Guu6OC6NinTlasY93

Thanks for all your support of my little project over the last year, and Happy New Year to all!


Re: [Elecraft_K3] K3S 630 Meter Quandry

Mel Farrer <farrerfolks@...>
 

Here is a tutorial.

E(I)RP

In most countries there is an E(I)RP limit rather than a TX output power limit. This limit is between 1 and 5 Watt EIRP (except New Zealand with a 25 W EIRP limit).
The effective radiated power (ERP, in W) depends on TX power (P, in W), antenna gain (G, in dBd) and antenna efficiency (η):
ERP = η · P · 10G/10
The ratio between ERP and EIRP (effective isotropic radiated power) is:
ERP = EIRP/1.64   or   ERPdB = EIRPdB - 2.15dB
A small (toploaded) vertical monopole antenna has a theoretical gain of 3 (4.77 dBi or 2.62 dBd). For an unobstructed antenna and a good ground (low loss) the real gain will be close to the theoretical value. But as the ground conductivity drops (and the ground loss rises) the radiation pattern of a vertical monopole will  be affected, resulting in a lower gain.
Obstructions near or even under the antenna will reduce the effective antenna height. The radiation resistance will be less than the theoretical value (based on the physical dimensions of the antenna) and thus the efficiency will drop. Small antennas seem to suffer more from this effect than big antennas. Measurements on 136 kHz have shown that his additional loss can vary from 1 dB (large unobstructed antenna) to 5 dB (small antenna with lot of objects around). On 472 kHz this effect is probably less profound, but with small or heavily obstructed antennas up to 3 dB extra RF power might be needed.
The theoretical gain of a small loop antenna is 1.5 (1.76dBi or -0.39dBd) and is much less affected by obstructions or poor ground.
A result of the rather low E(I)RP limit is that with most antennas (except for very small ones) it is not so hard to reach this limit, it is just a matter of RF power:
  • Case 1: a small toploaded vertical antenna (6 m high and 20 m topload wire) with a radiation resistance RA = 0.1 Ω and a loss resistance RG = 100 Ω.
    The efficiency η = RA/(RA+RG) = 0.1/100.1 = 0.000999 (-30.0 dB) and the antenna gain G = 1.5 (due to very poor ground).
    This means that 667 W RF power is needed to reach 1 W EIRP (1094 W RF for 1 W ERP and 3337 W RF for 5 W EIRP).
  • Case 2: an average toploaded vertical antenna (10 m high with 30 m topload wire) with RA = 0.3 Ω and RG = 50 Ω.
    The efficiency η = RA/(RA+RG) = 0.3/50.3 = 0.00596 (-22.2 dB) and the antenna gain G = 2 (due to poor ground).
    This means that 84 W RF power is needed to reach 1 W EIRP (138 W RF for 1 W ERP and 419 W RF for 5 W EIRP).
  • Case 3: a large toploaded vertical antenna (18 m high with 50 m topload wire) with RA = 1 Ω and RG = 30 Ω.
    The efficiency η = RA/(RA+RG) = 1/31 = 0.0323 (-14.9 dB) and the antenna gain G = 2.5 (due to average ground).
    This means that 12 W RF power is needed to reach 1 W EIRP (20 W RF for 1 W ERP and 62 W RF for 5 W EIRP).
  • Case 4: a "giant" toploaded vertical antenna (50 m high with 100 m topload wire) with RA = 8 Ω and RG = 15 Ω.
    The efficiency η = RA/(RA+RG) = 8/23 = 0.348 (-4.6 dB) and the antenna gain G = 3.
    This means that 0.96 W RF power is needed to reach 1 W EIRP (1.6 W RF for 1 W ERP and 4.8 W RF for 5 W EIRP).
With large antennas it is easy to generate several 10 or even 100 Watts EIRP. Running 500 W RF power into the "giant" antenna (case 4) will result in a theoretical EIRP of 522 W. Even taking into account an additional loss of 2 dB due to a lower effective height the EIRP is still about 320 W!

From 472.ORG.

Mel, K6KBE


From: "Rob Sherwood. rob@... [Elecraft_K3]"
To: "Elecraft_K3@..."
Sent: Saturday, December 30, 2017 10:53 AM
Subject: Re: [Elecraft_K3] K3S 630 Meter Quandry

 
5 watts IERP.  How we are supposed to measure that is a different story.  My Monitor Sensors transverter puts out a nominal 50 watt, though you can push it harder. I don't. 
Rob
NC0B


On Dec 30, 2017, at 7:49 AM, 'Mal Speer' malco@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 
I think the max power on that band is 5W
 
From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Friday, December 29, 2017 5:12 PM
To: Elecraft_K3@...
Subject: Re: [Elecraft_K3] K3S 630 Meter Quandry
 
 
I h ave designed and build MANY station control console with DDS and buffer linear amplifiers to drive TX..  There is nothing wrong in constructing a station in such a manner and be legal.  What seems to be at issue is a after market amplifier with excessive gain.  This is not the case in getting a home built TX chain up to some reasonable level on 630 meters.  IMHO.  And I might be wrong again....
 
Mel, K6KBE
 

From: "Wes wes@... [Elecraft_K3]" <Elecraft_K3@...>
To: Elecraft_K3@...
Sent: Friday, December 29, 2017 2:01 PM
Subject: Re: [Elecraft_K3] K3S 630 Meter Quandry
 
 
The limit is actually 15 dB.  That said, you can't easily get 44 dB of stable gain from a small signal amp let alone a PA.  So you will have to cascade multiple amps.  I suppose if someone commercially supplies a cascade of amps in one box that might fail the FCC 15 dB requirement, but then 97.315 (b)(3) seems to say a such an amplifier could be sold to a radio amateur for use in his station anyway.  I am not, thank God, a lawyer so I might well be wrong about this.

Wes  N7WS



On 12/29/2017 8:11 AM, mfroster@... [Elecraft_K3] wrote:
 
One of the reasons that I purchased the K3S was because it is capable of working the new 630 meter band.  The power output is something less than 1 mw.
 
I kept thinking that there should be a commercial amplifier available sometime, to take this 1 mw signal and amplify it to a usable output.
 
However, what I'm beginning to realize is that with the FCC limitation of 13 db amplifier gain limit, it will never be available.  It would take at LEAST 44 db of gain to get to 25 watts!
 
I realize there is the article:
but this design is non-linear.
 
I know there are some LDMOS devices that have gains in the order of 26 db (BLF188XR for one) and I'm wondering if there are any similar devices, somewhat lower power, that would take the K3S output to a 
respectable RF output in more of a linear fashion.
 
Mike,  W0IH
 
 
 


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Re: [Elecraft_K3] K3S 630 Meter Quandry

Rob Sherwood
 

5 watts IERP.  How we are supposed to measure that is a different story.  My Monitor Sensors transverter puts out a nominal 50 watt, though you can push it harder. I don't. 
Rob
NC0B


On Dec 30, 2017, at 7:49 AM, 'Mal Speer' malco@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

I think the max power on that band is 5W

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Friday, December 29, 2017 5:12 PM
To: Elecraft_K3@...
Subject: Re: [Elecraft_K3] K3S 630 Meter Quandry

 

 

I h ave designed and build MANY station control console with DDS and buffer linear amplifiers to drive TX.  There is nothing wrong in constructing a station in such a manner and be legal.  What seems to be at issue is a after market amplifier with excessive gain.  This is not the case in getting a home built TX chain up to some reasonable level on 630 meters.  IMHO.  And I might be wrong again....

 

Mel, K6KBE

 


From: "Wes wes@... [Elecraft_K3]" <Elecraft_K3@...>
To: Elecraft_K3@...
Sent: Friday, December 29, 2017 2:01 PM
Subject: Re: [Elecraft_K3] K3S 630 Meter Quandry

 

 

The limit is actually 15 dB.  That said, you can't easily get 44 dB of stable gain from a small signal amp let alone a PA.  So you will have to cascade multiple amps.  I suppose if someone commercially supplies a cascade of amps in one box that might fail the FCC 15 dB requirement, but then 97.315 (b)(3) seems to say a such an amplifier could be sold to a radio amateur for use in his station anyway.  I am not, thank God, a lawyer so I might well be wrong about this.

Wes  N7WS



On 12/29/2017 8:11 AM, mfroster@... [Elecraft_K3] wrote:

 

One of the reasons that I purchased the K3S was because it is capable of working the new 630 meter band.  The power output is something less than 1 mw.

 

I kept thinking that there should be a commercial amplifier available sometime, to take this 1 mw signal and amplify it to a usable output.

 

However, what I'm beginning to realize is that with the FCC limitation of 13 db amplifier gain limit, it will never be available.  It would take at LEAST 44 db of gain to get to 25 watts!

 

I realize there is the article:

but this design is non-linear.

 

I know there are some LDMOS devices that have gains in the order of 26 db (BLF188XR for one) and I'm wondering if there are any similar devices, somewhat lower power, that would take the K3S output to a 

respectable RF output in more of a linear fashion.

 

Mike,  W0IH

 

 

 



If this email is spam, report it to www.OnlyMyEmail.com


Re: [Elecraft_K3] K3S power output drops when using the digital modes.

Ed Muns, W0YK
 

Actually the problem was due some units having gold pins mated with tin sockets or vice versa.   Dissimilar metals in contact caused the corrosion.  The solution was to use the same material in both.  The problem  manifested in the KPA100 interconnect as well as the front panel-motherboard connect.

73,
Ed W0YK

-------- Original message --------
From: "'David G3YYD' g3yyd2@... [Elecraft_K3]" <Elecraft_K3@...>
Date: 12/30/17 1:18 AM (GMT-08:00)
To: Elecraft_K3@...
Subject: RE: [Elecraft_K3] K3S power output drops when using the digital modes.

Early serial numbers of the K3 used tin plated pins on the mother board to the KPA100 connector for the higher current 13.8v supply. These heated and oxidised causing a high resistance. Changing them to gold plated pins solves the problem.

 

73 David G3YYD

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: 29 December 2017 19:59
To: Elecraft_K3@...
Subject: RE: [Elecraft_K3] K3S power output drops when using the digital modes.

 




Is the rig a K3 or a K3S?  I couldn’t tell.  Older K3 radios had problems with the +13.8 volt pins to the PA burning up.   If that was the case, I assume you would have even worse problems at 100 watts.

 

Rob

NC0B

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Friday, December 29, 2017 12:47 PM
To: Elecraft_K3@...
Subject: Re: [Elecraft_K3] K3S power output drops when using the digital modes.

 

 

Have a look at the PA temperature which is accessible via the DISP tap button and then turm VFO B to reveal the answer. Also run a power check (its in the manual and runs the rig from different power levels to check all is OK.

Well that's my thoughts.

 

Andy G4HUE

----Original message----
From : Elecraft_K3@...
Date : 29/12/2017 - 19:34 (GMTST)
To : Elecraft_K3@...
Subject : [Elecraft_K3] K3S power output drops when using the digital modes.

 

I'm assuming that there are a few K3s owners who may be able to shed some light on this problem.

 

Occasionally when I'm running the K3s with about 20 watts, the power drops while I'm using the digital modes (FT8, Jt65, JT9). After working a few stations, the output suddenly falls to 0. The only way to resume a QSO is to  crank the power back up to slightly under 12 watts.

 

 As long as I keep the rig operating under 12 watts, I have no problems. However, an output greater than this level creates the problem when running any one of the digital modes for several minutes. Thus far, I've done the following:

 

1. Checked my ALC and have it running with 4 bars.

2. Checked my SWR to make sure with the PALSTAR AT2K antenna tuner measures close 1:1.

3. Used my Kenwood TS-990s running 25 wat ts with the same antenna(s) and digital modes with no problem.

4. Used my ICOM 7000 in the digital modes, running  20 watts without any problems in power output.

5. Checked my antenna connections and USB connection to the computer. All equipment is grounded to prevent any RF problems in the shack. (My station is shown on QRZ..com)

 

I'm wondering if there's a heat problem which causes the K3s to lower its power output.

 

Let me know what you think. Gang.. Any help would be appreciated.

 

TNX and 73 Gary K2ITT

 

 

 

 


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Re: [Elecraft_K3] K3S 630 Meter Quandry

Mel Farrer <farrerfolks@...>
 

Yes, 5 W ERP Effective Radiated Power, not transmitter power.  Many of the antennas on 630 Meters are down many dB.  So the input power allowed to the antenna is realitive to the radiation loss.  If the calculated antenna is -10 dB you can run 50 watts into the antenna port.   


Mel, K6KBE



From: "'Mal Speer' malco@... [Elecraft_K3]"
To: Elecraft_K3@...
Sent: Saturday, December 30, 2017 6:49 AM
Subject: RE: [Elecraft_K3] K3S 630 Meter Quandry

 
I think the max power on that band is 5W
 
From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Friday, December 29, 2017 5:12 PM
To: Elecraft_K3@...
Subject: Re: [Elecraft_K3] K3S 630 Meter Quandry
 
 
I h ave designed and build MANY station control console with DDS and buffer linear amplifiers to drive TX.  There is nothing wrong in constructing a station in such a manner and be legal.  What seems to be at issue is a after market amplifier with excessive gain.  This is not the case in getting a home built TX chain up to some reasonable level on 630 meters.  IMHO.  And I might be wrong again....
 
Mel, K6KBE
 

From: "Wes wes@... [Elecraft_K3]" <Elecraft_K3@...>
To: Elecraft_K3@...
Sent: Friday, December 29, 2017 2:01 PM
Subject: Re: [Elecraft_K3] K3S 630 Meter Quandry
 
 
The limit is actually 15 dB.  That said, you can't easily get 44 dB of stable gain from a small signal amp let alone a PA.  So you will have to cascade multiple amps.  I suppose if someone commercially supplies a cascade of amps in one box that might fail the FCC 15 dB requirement, but then 97.315 (b)(3) seems to say a such an amplifier could be sold to a radio amateur for use in his station anyway.  I am not, thank God, a lawyer so I might well be wrong about this.

Wes  N7WS



On 12/29/2017 8:11 AM, mfroster@... [Elecraft_K3] wrote:
 
One of the reasons that I purchased the K3S was because it is capable of working the new 630 meter band.  The power output is something less than 1 mw.
 
I kept thinking that there should be a commercial amplifier available sometime, to take this 1 mw signal and amplify it to a usable output.
 
However, what I'm beginning to realize is that with the FCC limitation of 13 db amplifier gain limit, it will never be available.  It would take at LEAST 44 db of gain to get to 25 watts!
 
I realize there is the article:
but this design is non-linear.
 
I know there are some LDMOS devices that have gains in the order of 26 db (BLF188XR for one) and I'm wondering if there are any similar devices, somewhat lower power, that would take the K3S output to a 
respectable RF output in more of a linear fashion.
 
Mike,  W0IH
 
 
 



Re: [Elecraft_K3] K3S 630 Meter Quandry

 


Re: [Elecraft_K3] K3S power output drops when using the digital modes.

David G3YYD
 

Early serial numbers of the K3 used tin plated pins on the mother board to the KPA100 connector for the higher current 13.8v supply. These heated and oxidised causing a high resistance. Changing them to gold plated pins solves the problem.

 

73 David G3YYD

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: 29 December 2017 19:59
To: Elecraft_K3@...
Subject: RE: [Elecraft_K3] K3S power output drops when using the digital modes.

 




Is the rig a K3 or a K3S?  I couldn’t tell.  Older K3 radios had problems with the +13.8 volt pins to the PA burning up.   If that was the case, I assume you would have even worse problems at 100 watts.

 

Rob

NC0B

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Friday, December 29, 2017 12:47 PM
To: Elecraft_K3@...
Subject: Re: [Elecraft_K3] K3S power output drops when using the digital modes.

 

 

Have a look at the PA temperature which is accessible via the DISP tap button and then turm VFO B to reveal the answer. Also run a power check (its in the manual and runs the rig from different power levels to check all is OK.

Well that's my thoughts.

 

Andy G4HUE

----Original message----
From : Elecraft_K3@...
Date : 29/12/2017 - 19:34 (GMTST)
To : Elecraft_K3@...
Subject : [Elecraft_K3] K3S power output drops when using the digital modes.

 

I'm assuming that there are a few K3s owners who may be able to shed some light on this problem.

 

Occasionally when I'm running the K3s with about 20 watts, the power drops while I'm using the digital modes (FT8, Jt65, JT9). After working a few stations, the output suddenly falls to 0. The only way to resume a QSO is to  crank the power back up to slightly under 12 watts.

 

 As long as I keep the rig operating under 12 watts, I have no problems. However, an output greater than this level creates the problem when running any one of the digital modes for several minutes. Thus far, I've done the following:

 

1. Checked my ALC and have it running with 4 bars.

2. Checked my SWR to make sure with the PALSTAR AT2K antenna tuner measures close 1:1.

3. Used my Kenwood TS-990s running 25 wat ts with the same antenna(s) and digital modes with no problem.

4. Used my ICOM 7000 in the digital modes, running  20 watts without any problems in power output.

5. Checked my antenna connections and USB connection to the computer. All equipment is grounded to prevent any RF problems in the shack. (My station is shown on QRZ.com)

 

I'm wondering if there's a heat problem which causes the K3s to lower its power output.

 

Let me know what you think. Gang. Any help would be appreciated.

 

TNX and 73 Gary K2ITT

 

 

 

 


If this email is spam, report it to www.OnlyMyEmail.com





Re: [Elecraft_K3] K3S 630 Meter Quandry

Mal
 

I think the max power on that band is 5W

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Friday, December 29, 2017 5:12 PM
To: Elecraft_K3@...
Subject: Re: [Elecraft_K3] K3S 630 Meter Quandry

 

 

I h ave designed and build MANY station control console with DDS and buffer linear amplifiers to drive TX.  There is nothing wrong in constructing a station in such a manner and be legal.  What seems to be at issue is a after market amplifier with excessive gain.  This is not the case in getting a home built TX chain up to some reasonable level on 630 meters.  IMHO.  And I might be wrong again....

 

Mel, K6KBE

 


From: "Wes wes@... [Elecraft_K3]" <Elecraft_K3@...>
To: Elecraft_K3@...
Sent: Friday, December 29, 2017 2:01 PM
Subject: Re: [Elecraft_K3] K3S 630 Meter Quandry

 

 

The limit is actually 15 dB.  That said, you can't easily get 44 dB of stable gain from a small signal amp let alone a PA.  So you will have to cascade multiple amps.  I suppose if someone commercially supplies a cascade of amps in one box that might fail the FCC 15 dB requirement, but then 97.315 (b)(3) seems to say a such an amplifier could be sold to a radio amateur for use in his station anyway.  I am not, thank God, a lawyer so I might well be wrong about this.

Wes  N7WS



On 12/29/2017 8:11 AM, mfroster@... [Elecraft_K3] wrote:

 

One of the reasons that I purchased the K3S was because it is capable of working the new 630 meter band.  The power output is something less than 1 mw.

 

I kept thinking that there should be a commercial amplifier available sometime, to take this 1 mw signal and amplify it to a usable output.

 

However, what I'm beginning to realize is that with the FCC limitation of 13 db amplifier gain limit, it will never be available.  It would take at LEAST 44 db of gain to get to 25 watts!

 

I realize there is the article:

but this design is non-linear.

 

I know there are some LDMOS devices that have gains in the order of 26 db (BLF188XR for one) and I'm wondering if there are any similar devices, somewhat lower power, that would take the K3S output to a 

respectable RF output in more of a linear fashion.

 

Mike,  W0IH

 

 

 


Re: [Elecraft_K3] K3S power output drops when using the digital modes.

Bob McGraw - K4TAX
 

Yes, after the radio has been on for some time but not having been in a transmit cycle, the FP and PA temperature should be about the same.  Mine has been on for several hours and both are 34ºC.   Transmit has not been active in over 1 hr.  There is a calibration procedure in the manual.  See page 54.    

At the lower power level, below about 12 watts the PA is not active.  This might explain why lower power works and a bit higher power faults.    Check fans and procedure in the manual.  See page 29.

73

Bob, K4TAX



On 12/29/2017 8:20 PM, William Conkling bconk75@... [Elecraft_K3] wrote:
 

Check the PA and Front Panel temps on front panel. See manual on alternate display in VFO B area of display. 

...nr4c. bill


On Dec 29, 2017, at 2:47 PM, ANDY NEHAN andy.nehan@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

Have a look at the PA temperature which is accessible via the DISP tap button and then turm VFO B to reveal the answer. Also run a power check (its in the manual and runs the rig from different power levels to check all is OK.

Well that's my thoughts.


Andy G4HUE

----Original message----
From : Elecraft_K3@...
Date : 29/12/2017 - 19:34 (GMTST)
To : Elecraft_K3@...
Subject : [Elecraft_K3] K3S power output drops when using the digital modes.

 

I'm assuming that there are a few K3s owners who may be able to shed some light on this problem.


Occasionally when I'm running the K3s with about 20 watts, the power drops while I'm using the digital modes (FT8, Jt65, JT9). After working a few stations, the output suddenly falls to 0. The only way to resume a QSO is to  crank the power back up to slightly under 12 watts.


 As long as I keep the rig operating under 12 watts, I have no problems. However, an output greater than this level creates the problem when running any one of the digital modes for several minutes. Thus far, I've done the following:


1. Checked my ALC and have it running with 4 bars.

2. Checked my SWR to make sure with the PALSTAR AT2K antenna tuner measures close 1:1.

3. Used my Kenwood TS-990s running 25 wat ts with the same antenna(s) and digital modes with no problem.

4. Used my ICOM 7000 in the digital modes, running  20 watts without any problems in power output.

5. Checked my antenna connections and USB connection to the computer. All equipment is grounded to prevent any RF problems in the shack. (My station is shown on QRZ.com)


I'm wondering if there's a heat problem which causes the K3s to lower its power output.


Let me know what you think. Gang. Any help would be appreciated.


TNX and 73 Gary K2ITT





Re: [Elecraft_K3] K3S power output drops when using the digital modes.

William Conkling <bconk75@...>
 

Check the PA and Front Panel temps on front panel. See manual on alternate display in VFO B area of display. 

...nr4c. bill


On Dec 29, 2017, at 2:47 PM, ANDY NEHAN andy.nehan@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

Have a look at the PA temperature which is accessible via the DISP tap button and then turm VFO B to reveal the answer. Also run a power check (its in the manual and runs the rig from different power levels to check all is OK.

Well that's my thoughts.


Andy G4HUE

----Original message----
From : Elecraft_K3@...
Date : 29/12/2017 - 19:34 (GMTST)
To : Elecraft_K3@...
Subject : [Elecraft_K3] K3S power output drops when using the digital modes.

 

I'm assuming that there are a few K3s owners who may be able to shed some light on this problem.


Occasionally when I'm running the K3s with about 20 watts, the power drops while I'm using the digital modes (FT8, Jt65, JT9). After working a few stations, the output suddenly falls to 0. The only way to resume a QSO is to  crank the power back up to slightly under 12 watts.


 As long as I keep the rig operating under 12 watts, I have no problems. However, an output greater than this level creates the problem when running any one of the digital modes for several minutes. Thus far, I've done the following:


1. Checked my ALC and have it running with 4 bars.

2. Checked my SWR to make sure with the PALSTAR AT2K antenna tuner measures close 1:1.

3. Used my Kenwood TS-990s running 25 wat ts with the same antenna(s) and digital modes with no problem.

4. Used my ICOM 7000 in the digital modes, running  20 watts without any problems in power output.

5. Checked my antenna connections and USB connection to the computer. All equipment is grounded to prevent any RF problems in the shack. (My station is shown on QRZ.com)


I'm wondering if there's a heat problem which causes the K3s to lower its power output.


Let me know what you think. Gang. Any help would be appreciated.


TNX and 73 Gary K2ITT




Re: K3S 630 Meter Quandry

Michael Foerster
 

Thanks for the responses, everyone.  
I may have to look into the MonitorSensors Tranverter.

Mike, W0IH


Re: [Elecraft_K3] K3S 630 Meter Quandry

Bob McGraw - K4TAX
 

Of course the FCC allows a ham to  build there own amplifier for their own personal use.  I think there is a limit on the number of units one can produce in a year.  Something like one or two.  So one builds a cascade amplifier, in a single box, that has 30 or 40 dB of gain with a reasonable output power.  After all, in my VHF station I take 1 mw to legal limit power through several stages of amplification.

73

Bob, K4TAX


On 12/29/2017 4:01 PM, Wes wes@... [Elecraft_K3] wrote:
 

The limit is actually 15 dB.  That said, you can't easily get 44 dB of stable gain from a small signal amp let alone a PA.  So you will have to cascade multiple amps.  I suppose if someone commercially supplies a cascade of amps in one box that might fail the FCC 15 dB requirement, but then 97.315 (b)(3) seems to say a such an amplifier could be sold to a radio amateur for use in his station anyway.  I am not, thank God, a lawyer so I might well be wrong about this.

Wes  N7WS



On 12/29/2017 8:11 AM, mfroster@... [Elecraft_K3] wrote:
 

One of the reasons that I purchased the K3S was because it is capable of working the new 630 meter band.  The power output is something less than 1 mw.


I kept thinking that there should be a commercial amplifier available sometime, to take this 1 mw signal and amplify it to a usable output.


However, what I'm beginning to realize is that with the FCC limitation of 13 db amplifier gain limit, it will never be available.  It would take at LEAST 44 db of gain to get to 25 watts!


I realize there is the article:

   http://njdtechnologies.net/630-meter-class-de-amplifier/

but this design is non-linear.


I know there are some LDMOS devices that have gains in the order of 26 db (BLF188XR for one) and I'm wondering if there are any similar devices, somewhat lower power, that would take the K3S output to a 

respectable RF output in more of a linear fashion.


Mike,  W0IH

 




Re: [Elecraft_K3] K3S 630 Meter Quandry

Mel Farrer <farrerfolks@...>
 

I h ave designed and build MANY station control console with DDS and buffer linear amplifiers to drive TX.  There is nothing wrong in constructing a station in such a manner and be legal.  What seems to be at issue is a after market amplifier with excessive gain.  This is not the case in getting a home built TX chain up to some reasonable level on 630 meters.  IMHO.  And I might be wrong again....

Mel, K6KBE



From: "Wes wes@... [Elecraft_K3]"
To: Elecraft_K3@...
Sent: Friday, December 29, 2017 2:01 PM
Subject: Re: [Elecraft_K3] K3S 630 Meter Quandry

 
The limit is actually 15 dB.  That said, you can't easily get 44 dB of stable gain from a small signal amp let alone a PA.  So you will have to cascade multiple amps.  I suppose if someone commercially supplies a cascade of amps in one box that might fail the FCC 15 dB requirement, but then 97.315 (b)(3) seems to say a such an amplifier could be sold to a radio amateur for use in his station anyway.  I am not, thank God, a lawyer so I might well be wrong about this.

Wes  N7WS



On 12/29/2017 8:11 AM, mfroster@... [Elecraft_K3] wrote:
 
One of the reasons that I purchased the K3S was because it is capable of working the new 630 meter band.  The power output is something less than 1 mw.

I kept thinking that there should be a commercial amplifier available sometime, to take this 1 mw signal and amplify it to a usable output.

However, what I'm beginning to realize is that with the FCC limitation of 13 db amplifier gain limit, it will never be available.  It would take at LEAST 44 db of gain to get to 25 watts!

I realize there is the article:
but this design is non-linear.

I know there are some LDMOS devices that have gains in the order of 26 db (BLF188XR for one) and I'm wondering if there are any similar devices, somewhat lower power, that would take the K3S output to a 
respectable RF output in more of a linear fashion.

Mike,  W0IH
 



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