Date   

Re: Elecraft K3S - DVR problems

OZ0J Joe
 

Bob and others

 

I only used the buttons on the front panel of my K3S. recording to M1 and hold M1 to start the peat function. As fa as I remember it was on 20 and 40 meters (same antenna and same amplifier). I was not much on 80 meters (other antenna and other amplifier) and I cannot remember whatever I had the problem on 80 meters.

 

I will try to remove and re-seat the DVK board if anyone do no have some other suggestions.

 

Joe, OZ0J

 

 

Fra: Elecraft-K3@groups.io <Elecraft-K3@groups.io> På vegne af Bill Mader
Sendt: 12. oktober 2020 22:22
Til: Elecraft-K3@groups.io
Emne: Re: [Elecraft-K3] Elecraft K3S - DVR problems

 

How did you use it and how frequently did it fail Joe?

Did you have a logger running on a PC and use it to activate the DVK using the appropriate macro commands?  If this is true, I would test repeatedly with no or low RF output into a dummy load.

Or, did you use the K3 M1 button?  If this is true, I would remove and re-seat the DVK board.

I have never had my DVK fail on either K3 regardless of the method I use to start it.  I use it almost daily.

73, Bill, K8TE


Re: pre order

Bob Evans
 

Antonio,

I don't know this for certain but I imagine you will not get a response until Elecraft has received enough pre-orders to make a production run on the item or items you pre-oredered.  They are just getting a feel for how much demand there might be before they commit to a production run.  When they get enough interest, you should receive a request for money and you will know your order has been entered.  ;-)  

Good luck,
Bob K5WA


Re: K3 ANT to IF OUT Conversion Gain

Al N1AL
 

On 10/12/2020 6:34 PM, Bob Wilson, N6TV wrote:
I've been using a Perseus SDR as a transceiver panadapter for about 12 years now.  I highly recommend ignoring K3 IF OUT; use K3 RX ANT OUT instead.  This works with many radios, not just the K3
...

There are many advantages to doing it this way:
  • No significant loss of sensitivity (just 3 dB from splitter)
The IF out signal loss is only 3 dB or so more than that with preamp off and actually has gain with preamp on.
  • The panadapter span is not limited by the bandwidth of K3 IF (200 kHz?); you can monitor the entire band with the Perseus, not just a small portion

I believe the K3 IF bandwidth (pre-crystal filter) is much greater than 200 kHz.  I think it is limited only by the front-end filters - you should be able to scan the whole band.

Alan N1AL



Re: K3 ANT to IF OUT Conversion Gain

Wes Stewart
 

I would call that a second receiver, not a panadapter/bandscope.  I use an SDR-IQ with SpectraVue software for my bandscope.

SpectraVue knows all about the K3/K3S i-f output frequencies v. mode and BW so it displays the tuned frequency in the middle of the screen regardless of those adjustments (if desired, which I do).  It offers point-n-click or mouse wheel tuning.  There is no display smearing, refresh is instantaneous.  No fuss, no muss.

Wes  N7WS

On Monday, October 12, 2020, 5:34:48 PM MST, Bob Wilson, N6TV <n6tv@...> wrote:


On Mon, Oct 12, 2020 at 4:11 PM Robert <rdiamant36@...> wrote:
I am waiting for a used K3 to arrive soon and I am already thinking about using my Perseus SDR as a no cost "panadapter" connected at the IF OUT connector for many years.

I've been using a Perseus SDR as a transceiver panadapter for about 12 years now.  I highly recommend ignoring K3 IF OUT; use K3 RX ANT OUT instead.  This works with many radios, not just the K3.

See my presentation linked from my QRZ.COM page, or the direct link below:
The technique is the same for an SO1R station:  just split RX ANT OUT to (1) RX ANT IN and (2) Perseus ANT IN using a 50 ohm "Magic T" splitter (or a 75 ohm TV splitter).  A BNC "T" connector is not recommended since it doesn't isolate the two outputs.

There are many advantages to doing it this way:
  • No significant loss of sensitivity (just 3 dB from splitter)
  • The panadapter span is not limited by the bandwidth of K3 IF (200 kHz?); you can monitor the entire band with the Perseus, not just a small portion
  • The waterfall doesn't "smear" or move around when you move the VFO knob on the radio.  Frequency sync is no problem.
  • Using a program like HDSDR with OmniRig enabled, you can make the cursor on the panadapter track the VFO of the K3
  • You can use mouse click and mouse wheel scroll on the HDSDR waterfall to move the K3 VFO (something not supported by a P3, but supported by the K4)
  • The "Z" command (auto-zero beat) in HDSDR zero beats CW signals much faster and more accurately than the AUTO SPOT feature, and it can move your K3 VFO to do the same as long as both are calibrated the same
Note:  you must activate RX ANT on the K3, on every band, otherwise the Perseus receives no signal on that band.

73,
Bob, N6TV


Re: K3 ANT to IF OUT Conversion Gain

Robert
 

Hello Bob (N6TV),

Thank you for the very helpful information. Great job you did using the Perseus.
I was thinking about using the same configuration as yours, but taking the
signals from the IF OUT port changing bands on the K3 wouldn't be so cumbersome on the Perseus.
Tuning would have to be only across 100 kHz at the most. I will have a look at the HDSDR.
Thanks again for your response.

73, Robert (HB9BCZ, QTH Sarasota/FL)


On Mon, Oct 12, 2020 at 8:34 PM Bob Wilson, N6TV <n6tv@...> wrote:
On Mon, Oct 12, 2020 at 4:11 PM Robert <rdiamant36@...> wrote:
I am waiting for a used K3 to arrive soon and I am already thinking about using my Perseus SDR as a no cost "panadapter" connected at the IF OUT connector for many years.

I've been using a Perseus SDR as a transceiver panadapter for about 12 years now.  I highly recommend ignoring K3 IF OUT; use K3 RX ANT OUT instead.  This works with many radios, not just the K3.

See my presentation linked from my QRZ.COM page, or the direct link below:
The technique is the same for an SO1R station:  just split RX ANT OUT to (1) RX ANT IN and (2) Perseus ANT IN using a 50 ohm "Magic T" splitter (or a 75 ohm TV splitter).  A BNC "T" connector is not recommended since it doesn't isolate the two outputs.

There are many advantages to doing it this way:
  • No significant loss of sensitivity (just 3 dB from splitter)
  • The panadapter span is not limited by the bandwidth of K3 IF (200 kHz?); you can monitor the entire band with the Perseus, not just a small portion
  • The waterfall doesn't "smear" or move around when you move the VFO knob on the radio.  Frequency sync is no problem.
  • Using a program like HDSDR with OmniRig enabled, you can make the cursor on the panadapter track the VFO of the K3
  • You can use mouse click and mouse wheel scroll on the HDSDR waterfall to move the K3 VFO (something not supported by a P3, but supported by the K4)
  • The "Z" command (auto-zero beat) in HDSDR zero beats CW signals much faster and more accurately than the AUTO SPOT feature, and it can move your K3 VFO to do the same as long as both are calibrated the same
Note:  you must activate RX ANT on the K3, on every band, otherwise the Perseus receives no signal on that band.

73,
Bob, N6TV


Re: pre order

Wes Stewart
 

Yes

On Monday, October 12, 2020, 6:58:15 PM MST, Mel Marcus <melm@...> wrote:


Are the synthesizer user installable?

Mel
NE9A
-------- Original Message --------
Subject: [Elecraft-K3] pre order
From: "Antonio Padua" <py3iod@...>
Date: Mon, October 12, 2020 7:45 pm
To: Elecraft-K3@groups.io

Dear friends, I sent the pre-order proposal for the K3 kits for K3S, but so far I have not received any response from Elecraft. Does anyone have any news.
Thank you and 73,
de PY3IOD - Antonio


Re: pre order

Mel Marcus
 

Are the synthesizer user installable?

Mel
NE9A

-------- Original Message --------
Subject: [Elecraft-K3] pre order
From: "Antonio Padua" <py3iod@...>
Date: Mon, October 12, 2020 7:45 pm
To: Elecraft-K3@groups.io

Dear friends, I sent the pre-order proposal for the K3 kits for K3S, but so far I have not received any response from Elecraft. Does anyone have any news.
Thank you and 73,
de PY3IOD - Antonio


Re: FOR SALE: Elecraft P3 TXMon Adapter Brand New! SALE PENDING

James Kvochick
 

Sale of this item is currently pending, awaiting funds.

73

Jim K8JK


pre order

Antonio Padua
 

Dear friends, I sent the pre-order proposal for the K3 kits for K3S, but so far I have not received any response from Elecraft. Does anyone have any news.
Thank you and 73,
de PY3IOD - Antonio


Re: K3 ANT to IF OUT Conversion Gain

Bob Wilson, N6TV
 

On Mon, Oct 12, 2020 at 4:11 PM Robert <rdiamant36@...> wrote:
I am waiting for a used K3 to arrive soon and I am already thinking about using my Perseus SDR as a no cost "panadapter" connected at the IF OUT connector for many years.

I've been using a Perseus SDR as a transceiver panadapter for about 12 years now.  I highly recommend ignoring K3 IF OUT; use K3 RX ANT OUT instead.  This works with many radios, not just the K3.

See my presentation linked from my QRZ.COM page, or the direct link below:
The technique is the same for an SO1R station:  just split RX ANT OUT to (1) RX ANT IN and (2) Perseus ANT IN using a 50 ohm "Magic T" splitter (or a 75 ohm TV splitter).  A BNC "T" connector is not recommended since it doesn't isolate the two outputs.

There are many advantages to doing it this way:
  • No significant loss of sensitivity (just 3 dB from splitter)
  • The panadapter span is not limited by the bandwidth of K3 IF (200 kHz?); you can monitor the entire band with the Perseus, not just a small portion
  • The waterfall doesn't "smear" or move around when you move the VFO knob on the radio.  Frequency sync is no problem.
  • Using a program like HDSDR with OmniRig enabled, you can make the cursor on the panadapter track the VFO of the K3
  • You can use mouse click and mouse wheel scroll on the HDSDR waterfall to move the K3 VFO (something not supported by a P3, but supported by the K4)
  • The "Z" command (auto-zero beat) in HDSDR zero beats CW signals much faster and more accurately than the AUTO SPOT feature, and it can move your K3 VFO to do the same as long as both are calibrated the same
Note:  you must activate RX ANT on the K3, on every band, otherwise the Perseus receives no signal on that band.

73,
Bob, N6TV


Re: K3 ANT to IF OUT Conversion Gain

Robert
 

To Alan (N1AL):
Thank you ever so much for the info. I am waiting for a used K3 to arrive soon and I am already thinking about using my Perseus SDR as a no cost "panadapter" connected at the IF OUT connector. I believe there is no AGC in that signal path. The Perseus has more than 100dB dynamic range.

To W5AJ (name unknown) and all the other members of the group:
I thought signing with my callsign would cause confusion here or there.
Callsign: HB9BCZ (preparing for the FCC exam)
QTH: Sarasota/FL since May 2019
Licenced in HB9 since 1975

73, Robert


On Mon, Oct 12, 2020 at 6:17 PM Al N1AL <alan@...> wrote:

On 10/12/2020 1:57 PM, Robert wrote:
> Can someone please measure the conversion gain (in dB) of an Elecraft K3 from ANT to IF OUT (with 50 Ohm load on the IF OUT port) on any or preferably all  HAM bands? I can also do with data measured with KXV3A. According to the K3 schematics the is no AGS in front of the roofing filters.
> Thanks for any help.
> 73, Robert

Assuming a reasonably late-model K3 or an older one that has the IF out
modification, the gain from the K3 antenna to the IF output is
approximately -6 to -7 dB with the K3 preamp off and about +4 to +5 dB
with the preamp on.

Alan N1AL







FOR SALE: Elecraft P3 TXMon Adapter Brand New!

James Kvochick
 

 - Elecraft P3 TXMon Adapter UNUSED! Brand New Unused Elecraft TXMon adapter for Elecraft P3.
Previous owner never had the opportunity to install in their P3.
Sealed module, and hardware bag, complete with 2KW coupler and cable.
Instructions included.
NOTE:  Does NOT include the P3 in this sale, to be clear.
$245 shipped. PayPal is acceptable.
73
Jim K8JK


Re: K3 ANT to IF OUT Conversion Gain

Al N1AL
 

On 10/12/2020 1:57 PM, Robert wrote:
Can someone please measure the conversion gain (in dB) of an Elecraft K3 from ANT to IF OUT (with 50 Ohm load on the IF OUT port) on any or preferably all HAM bands? I can also do with data measured with KXV3A. According to the K3 schematics the is no AGS in front of the roofing filters.
Thanks for any help.
73, Robert
Assuming a reasonably late-model K3 or an older one that has the IF out modification, the gain from the K3 antenna to the IF output is approximately -6 to -7 dB with the K3 preamp off and about +4 to +5 dB with the preamp on.

Alan N1AL


Re: Elecraft K3S - DVR problems

Bill Mader
 

How did you use it and how frequently did it fail Joe?

Did you have a logger running on a PC and use it to activate the DVK using the appropriate macro commands?  If this is true, I would test repeatedly with no or low RF output into a dummy load.

Or, did you use the K3 M1 button?  If this is true, I would remove and re-seat the DVK board.

I have never had my DVK fail on either K3 regardless of the method I use to start it.  I use it almost daily.

73, Bill, K8TE


K3 ANT to IF OUT Conversion Gain

Robert
 

Can someone please measure the conversion gain (in dB) of an Elecraft K3 from ANT to IF OUT (with 50 Ohm load on the IF OUT port) on any or preferably all HAM bands? I can also do with data measured with KXV3A. According to the K3 schematics the is no AGS in front of the roofing filters.
Thanks for any help.
73, Robert


Re: Elecraft K3S - DVR problems

OZ0J Joe
 

Hi Keith

 

V 05.67. It seems to be the latest according to your homepage.

 

Joe, OZ0J

 

 

Fra: Elecraft-K3@groups.io <Elecraft-K3@groups.io> På vegne af Keith_WE6R
Sendt: 12. oktober 2020 15:36
Til: Elecraft-K3@groups.io
Emne: Re: [Elecraft-K3] Elecraft K3S - DVR problems

 

Hi Joe, what DVR Firmware do you have? Turn on radio, config menu "FW REVS", rotate VFO A all the way clockwise.
Keith WE6R Elecraft K3 Tech


Re: Elecraft K3S - DVR problems

Keith_WE6R
 

Hi Joe, what DVR Firmware do you have? Turn on radio, config menu "FW REVS", rotate VFO A all the way clockwise.
Keith WE6R Elecraft K3 Tech


Re: Elecraft K3S - DVR problems

Colin Smithers
 

I once had the same problem. UK support suggested checking proper seating of all Inter-board connectors. Until my next serious contest with it I’m not sure if it is fixed yet. Keep you posted.

73, Colin G4CWH


On 12 Oct 2020, at 04:22, OZ0J Joe via groups.io <contest@...> wrote:



Hi

 

I have an Elecraft K3S with the KVDR3 installed. I used it a lot during the SAC SSB Contest this weekend.

 

When running the DVR in repeat the DVR decided to send empty CQ (TX on but no sound) from time to time or from one CQ to the next in repeat function decide not to work at all.

 

I turned off the K3S and turned it on again more than once during the weekend to get the DVR working.

 

Has anyone a clue how to fix the DVR?

 

 

73 Joe, OZ0J

https://english.oz0j.dk

 

 


Elecraft K3S - DVR problems

OZ0J Joe
 

Hi

 

I have an Elecraft K3S with the KVDR3 installed. I used it a lot during the SAC SSB Contest this weekend.

 

When running the DVR in repeat the DVR decided to send empty CQ (TX on but no sound) from time to time or from one CQ to the next in repeat function decide not to work at all.

 

I turned off the K3S and turned it on again more than once during the weekend to get the DVR working.

 

Has anyone a clue how to fix the DVR?

 

 

73 Joe, OZ0J

https://english.oz0j.dk

 

 


Re: 30 m tune

Bob Benedict, KD8CGH
 

Thanks Bob
I tried it and surprisingly if I touch the power knob the power display jumps up to the 7 watts TUN PWR setting, but then immediately drops back down to 0.0. From the manual:
TUNE Power Level
If CONFIG:TUN PWR is set to N O R, power output during T U N E will follow the present setting of P W R . If you change the TUN PWR parameter to a fixed power level, that level will be used during T U N E, whether or not you’ve selected per-band power control (see above).

I changed PWR SET to PER BAND and in spite of what the manual says, it now works on 30m like it previously did on all other bands.

  73
   Bob   KD8CGH