Date   

Re: Digital Display Unit for the Elecraft KPA500

Keith KV5J
 

One last try.

Keith Ennis (KV5J) is proud to introduce the second in his line of Digital Display Units.
The Digital Display Unit for Elecraft's KPA500.
 
For the Elecraft KPA500 I have designed a compact, easy to read Digital Display Unit (DDU). It allows the monitoring of 5 crucial readings all at the same time.
 
1.  Power amplifier's heat sink temperature
2.  Power amplifier's high voltage voltage
3.  Power amplifier's current
4.  Power amplifier's output power
5. SWR that the KPA500 sees at its output
 
The DDU measures is size only 4x4x2 inches with an easy to read 2 line display that can be located at the operating position and the KPA500 can be located over 10 feet away.
 
The DDU is designed with the following features:
 
Easy to read 2 line display
No USB or serial cable to computer
No com port in Windows to manage
No computer needed
Plug and Play
Simply connect the supplied DC power cable to the power supply and the supplied data jumper cable to the KPA500
Retains all functions of the KPA500 front panel
All displayed info obtained directly from the KPA500
 
The DDU will poll the KPA500 and display PA voltage and PA temperature during both receive and transmit cycles.  It will add watts and SWR display for a short amount of time after unkeying the amp.
 
For more information about the obtaining the DDU visit:   http://WWW.KV5J.COM
 





Keith, KV5J


On Monday, July 13, 2020, 07:13:06 AM CDT, Keith KV5J via groups.io <nelasat@...> wrote:


Keith Ennis (KV5J) is proud to introduce the second in his line of Digital Display Units.  
The Digital Display Unit for Elecraft's KPA500.
 
For the Elecraft KPA500 I have designed a compact, easy to read Digital Display Unit (DDU). It allows the monitoring of five crucial readings all at the same time.
 
1. Power amplifier's heat sink temperature
2. Power amplifier's high voltage supply voltage
3. Power amplifier's current
4. Power amplifier's output power
5. SWR that the KPA500 sees at its output 
 
The DDU measures only 4X4X2 with an easy to read 2 line display that can be located at the operating position and the KPA500 located up to 10 feet away.
 
The DDU is designed with the following features:
 
Easy to read 2 line display
No USB or serial cable to computer
No com port in Windows to manage
No computer needed
Plug and Play
Simply connect the supplied DC power cable to power supply and PC data jumper cable to the KPA500
Retains all functions of the KPA500 front panel
All displayed info obtained directly from the KPA500
 
The DDU will poll the KPA500 and display PA voltage and PA temperature during receive and transmit cycles. It will add watts, SWR and current during transmit. There is a built in hold time to keep the watts and SWR displayed for a short amount of time after unkeying the amp.
 
For more information about the DDU visit:   WWW.KV5J.COM

Keith,KV5J
 


Digital Display Unit for the Elecraft KPA500

Keith KV5J
 

Keith Ennis (KV5J) is proud to introduce the second in his line of Digital Display Units.  
The Digital Display Unit for Elecraft's KPA500.
 
For the Elecraft KPA500 I have designed a compact, easy to read Digital Display Unit (DDU). It allows the monitoring of five crucial readings all at the same time.
 
1. Power amplifier's heat sink temperature
2. Power amplifier's high voltage supply voltage
3. Power amplifier's current
4. Power amplifier's output power
5. SWR that the KPA500 sees at its output 
 
The DDU measures only 4X4X2 with an easy to read 2 line display that can be located at the operating position and the KPA500 located up to 10 feet away.
 
The DDU is designed with the following features:
 
Easy to read 2 line display
No USB or serial cable to computer
No com port in Windows to manage
No computer needed
Plug and Play
Simply connect the supplied DC power cable to power supply and PC data jumper cable to the KPA500
Retains all functions of the KPA500 front panel
All displayed info obtained directly from the KPA500
 
The DDU will poll the KPA500 and display PA voltage and PA temperature during receive and transmit cycles. It will add watts, SWR and current during transmit. There is a built in hold time to keep the watts and SWR displayed for a short amount of time after unkeying the amp.
 
For more information about the DDU visit:   WWW.KV5J.COM

Keith,KV5J
 


Re: K3 to Mazzoni Loop Controller

George Pappayliou
 

Love the antenna but I have been unsuccessful in getting it to auto tune to track my K3s. I have tried a variety of hook ups off of my P3. I know that the frequency information is there because it auto tunes my SteppIR Urban Beam without an issue.

If you find an answer please post a follow up as I would be interested to give it another try.


Regards, George W3GP
------------------------------------
George S. Pappayliou


On Jul 12, 2020, at 11:18 AM, David Bondy G4NRT <david@...> wrote:

I want to connect my K3 to my Ciro Mazzoni Baby Loop ATU v2.0 via an RS232 to RS232 cable.

I know that the loop controller has a setting to allow it to receive frequency change commands from Elecraft rigs but I do not know how or where to set the rig to send these commands via the RS232 connector.

If anyone has done this and can advise me then I would be most grateful!

73 de David G4NRT


Re: K3s not communicating with computer

Colin Smithers
 

When having problems communicating with a K3S over serial I eventually solved it but not above 9600. At one point I was told about a physical switch by Elecraft’s Don W3FPR. It is not completely clear what this switch does however:

If you do not achieve connection, try one more thing.  Remove the top cover of the K3S and on the KIO3B board sitting vertically in the left rear corner,, you will find a switch marked "USB RS232" - move it to the RS232 position and retry.  That is not normally necessary, but I include it for completeness.”

73, Colin G4CWH

 

From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of redarlington via groups.io
Sent: 12 July 2020 12:22
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] K3s not communicating with computer

 

USB and RS232 are not active at the same time.  Take your pick in the config menu.

 

-Bob

 

On Sat, Jul 11, 2020 at 10:46 AM Henry Jarzyna <va3ov@...> wrote:

For the first time after acquiring the previously owned K3s I connected the radio via the USB to the computer. The P3 is also connected via CBLP3Y to the radio. Baud is set at 38400. The K3s is not connecting with the computer and Elecraft Utility. When I disconnect the RJ45 from the radio, communication is complete and I can install updated firmware and I can use N1MM+ logger for the upcoming contest. I do not have the E980297 cable I can use for the second option. I would like to retain the complete functions of the P3. The RS232/P3 and USB ports can not be active at the same time?
Am I missing something? 73
Henry VA3OV


K3 to Mazzoni Loop Controller

David Bondy G4NRT
 

I want to connect my K3 to my Ciro Mazzoni Baby Loop ATU v2.0 via an RS232 to RS232 cable.

I know that the loop controller has a setting to allow it to receive frequency change commands from Elecraft rigs but I do not know how or where to set the rig to send these commands via the RS232 connector.

If anyone has done this and can advise me then I would be most grateful!

73 de David G4NRT


Re: K3s not communicating with computer

redarlington <rdarlington@...>
 

USB and RS232 are not active at the same time.  Take your pick in the config menu.

-Bob

On Sat, Jul 11, 2020 at 10:46 AM Henry Jarzyna <va3ov@...> wrote:
For the first time after acquiring the previously owned K3s I connected the radio via the USB to the computer. The P3 is also connected via CBLP3Y to the radio. Baud is set at 38400. The K3s is not connecting with the computer and Elecraft Utility. When I disconnect the RJ45 from the radio, communication is complete and I can install updated firmware and I can use N1MM+ logger for the upcoming contest. I do not have the E980297 cable I can use for the second option. I would like to retain the complete functions of the P3. The RS232/P3 and USB ports can not be active at the same time?
Am I missing something? 73
Henry VA3OV


Re: P3 display flashing on/off.

W9BIK
 

IT'S FIXED!

I thought I'd give a brief feedback on what fixed this issue. The fix boiled down to simply reseating the 40 pin ribbon connector on the P3's I/O board. Works good now.

I'd like to publicly give a big shout out to Alan, N1AL, for his thoughts and guidance as I troubleshot this issue. We exchanged several emails off-thread that were very helpful in guiding me to the root cause. Alan designed the P3 hardware and firmware, so I knew I was in good hands. Thanks Alan! 

73,
Chuck
W9BIK


Re: K3s not communicating with computer

Ed Pflueger
 

My baud rate is 38400.

 

Ed.. AB4IQ

 

From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of Rick NK7I
Sent: Saturday, July 11, 2020 3:21 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] K3s not communicating with computer

 

Try at 19200 (or other speeds).  If I recall correctly, you can 'talk' to the P3 at whatever speed you wish, but it talks to the K3 at 19200 only.

On the other hand if you're not serial connecting the P3 to the K3, the baud rate is in the K3 menu.

GL de Rick NK7I

 

On 7/10/2020 7:48 PM, Henry Jarzyna wrote:

For the first time after acquiring the previously owned K3s I connected the radio via the USB to the computer. The P3 is also connected via CBLP3Y to the radio. Baud is set at 38400. The K3s is not connecting with the computer and Elecraft Utility. When I disconnect the RJ45 from the radio, communication is complete and I can install updated firmware and I can use N1MM+ logger for the upcoming contest. I do not have the E980297 cable I can use for the second option. I would like to retain the complete functions of the P3. The RS232/P3 and USB ports can not be active at the same time?
Am I missing something? 73
Henry VA3OV


Re: K3s not communicating with computer

Rick NK7I
 

Try at 19200 (or other speeds).  If I recall correctly, you can 'talk' to the P3 at whatever speed you wish, but it talks to the K3 at 19200 only.

On the other hand if you're not serial connecting the P3 to the K3, the baud rate is in the K3 menu.

GL de Rick NK7I


On 7/10/2020 7:48 PM, Henry Jarzyna wrote:
For the first time after acquiring the previously owned K3s I connected the radio via the USB to the computer. The P3 is also connected via CBLP3Y to the radio. Baud is set at 38400. The K3s is not connecting with the computer and Elecraft Utility. When I disconnect the RJ45 from the radio, communication is complete and I can install updated firmware and I can use N1MM+ logger for the upcoming contest. I do not have the E980297 cable I can use for the second option. I would like to retain the complete functions of the P3. The RS232/P3 and USB ports can not be active at the same time?
Am I missing something? 73
Henry VA3OV


K3s not communicating with computer

Henry Jarzyna
 

For the first time after acquiring the previously owned K3s I connected the radio via the USB to the computer. The P3 is also connected via CBLP3Y to the radio. Baud is set at 38400. The K3s is not connecting with the computer and Elecraft Utility. When I disconnect the RJ45 from the radio, communication is complete and I can install updated firmware and I can use N1MM+ logger for the upcoming contest. I do not have the E980297 cable I can use for the second option. I would like to retain the complete functions of the P3. The RS232/P3 and USB ports can not be active at the same time?
Am I missing something? 73
Henry VA3OV


KXV3A Module For Sale

James Kvochick
 

Finally got around to upgrading my K3 with a KXV3B, so now I have the KXV3A module, bezel, hardware, and cable for sale.  $45 gets this sent to you.  Contact me at kvo@... if interested.

73
Jim K8JK


New release of Win4K3Suite

Tom Blahovici
 

Hello,
There is a new version of Win4K3Suite available.  This release improves the SDRPlay interface, includes a Startup macro and has overall improvements.
 
Win4K3Suite is a full featured control program for the K3/S, KX3 and KX2.  It has a built in Panadapter that works with LPPAN and a sound card, as well as the SDRPlay RSP's. It supports the KAT500, KPA500/1500 and the KXPA100 on most of the above radios.  
A unique feature is that is has 6 built in Virtual Radios, each of which works just like an Elecraft radio.  This allows sharing of a single COM port with up to 6 applications.  It also has a built in HRDLogbook server and the EiBi Shortwave database.
You see more information here: https://www.youtube.com/results?search_query=win4k3suite
and download a fully functional 30 day trial at va2fsq.com
 
73 Tom
va2fsq.com


Re: Loses Time

redarlington <rdarlington@...>
 

And a day later I'm +1 second on the clock immediately after I turned the radio on.   Things may have improved a lot for me with this adjustment over a long time period like a day.  Time will tell I guess.  Over short time periods I wouldn't trust the clock very far.

So adjust if you want.  Don't rely on the clock unless you really just can't afford the extra weight of a wrist watch on your backpack trip with the radio.

-Bob N3XKB

On Thu, Jul 9, 2020 at 2:16 PM Bob Darlington <rdarlington@...> wrote:
And after all this trouble, I'm off by more than 7 seconds in 30 minutes.

-Bob N3XKB

On Thu, Jul 9, 2020 at 1:02 PM redarlington via groups.io <rdarlington=gmail.com@groups.io> wrote:
Hey guys, just to add a little info that is hopefully useful to others, I took some pictures after going through this adjustment.


I'm using a 10x probe. 100x might be better but I don't know the circuit.  I don't like loading down oscillators which could shift the frequency I'm trying to adjust.  This is a cheap but very good $120 or so frequency counter from China and is being fed around the back with a 10MHz external reference (Trimble Thunderbolt GPSDO).  This version is good out to like 6GHz.  Not a sales pitch, but my HP units can't beat it for portability.

I needed to use a pretty skinny probe to reach back to the PCB.  There's a hole for the tip of the probe to slip into if you can reach it (I couldn't with the original probe I tried).    Definitely ground your probe shield somewhere.  I'm clipped to a 1/4" jack for paddles.  The little hole right next to it has the trimmer pot/cap (can't quite tell from out here).  I used a ceramic blade adjustment tool, but plastic would likely be better only due to the fact that it's a tight fit and the ceramic isn't exactly bendy.  Plastic probably would get around the scope probe a little easier -at least with mine.

My gut feeling is to recommend some minimum warmup time like 15-20 minutes before doing this adjustment.  I turned it on and spent maybe 5 minutes looking around for the counter (lost the darn thing on the workbench -it's small!)  I've already drifted about 0.12 Hz, but this kind of thing isn't exactly a precision oscillator with double ovens and all that.   That said, I'm optimistic that my clock won't be terrible now.

-Bob N3XKB

On Thu, Jul 9, 2020 at 11:25 AM Keith_WE6R <keithtrinity@...> wrote:
Yes, sorry. The K3S clock trimmer TP is 32.768 Khz behind the VFO A knob.
Keith WE6R


Re: Loses Time

Bob Novas
 

Ah the good old days when I had an HQ-100AC that kept perfect time, and could turn the thing on.

 

Bob - W3DK

 

From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of Wes Stewart via groups.io
Sent: Thursday, July 09, 2020 5:31 PM
To: Elecraft-K3@groups.io; Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Loses Time

 

I wouldn't expect it either.  Nor would I accept it.  (Actually, I would, I never use the clock anyway.)

 

Wes  N7WS

 

On Thursday, July 9, 2020, 1:58:03 PM MST, Ray Maxfield <wa6vab@...> wrote:

 

 

So Your Happy with that ?

 

Un-expectable to me.   Ray WA6VAB

 

From: redarlington
Sent: Thursday, July 9, 2020 1:16 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Loses Time

 

And after all this trouble, I'm off by more than 7 seconds in 30 minutes.

 

-Bob N3XKB

 

On Thu, Jul 9, 2020 at 1:02 PM redarlington via groups.io <rdarlington=gmail.com@groups.io> wrote:

Hey guys, just to add a little info that is hopefully useful to others, I took some pictures after going through this adjustment.

 

 

I'm using a 10x probe. 100x might be better but I don't know the circuit.  I don't like loading down oscillators which could shift the frequency I'm trying to adjust.  This is a cheap but very good $120 or so frequency counter from China and is being fed around the back with a 10MHz external reference (Trimble Thunderbolt GPSDO).  This version is good out to like 6GHz.  Not a sales pitch, but my HP units can't beat it for portability.

 

I needed to use a pretty skinny probe to reach back to the PCB.  There's a hole for the tip of the probe to slip into if you can reach it (I couldn't with the original probe I tried).    Definitely ground your probe shield somewhere.  I'm clipped to a 1/4" jack for paddles.  The little hole right next to it has the trimmer pot/cap (can't quite tell from out here).  I used a ceramic blade adjustment tool, but plastic would likely be better only due to the fact that it's a tight fit and the ceramic isn't exactly bendy.  Plastic probably would get around the scope probe a little easier -at least with mine.

 

My gut feeling is to recommend some minimum warmup time like 15-20 minutes before doing this adjustment.  I turned it on and spent maybe 5 minutes looking around for the counter (lost the darn thing on the workbench -it's small!)  I've already drifted about 0.12 Hz, but this kind of thing isn't exactly a precision oscillator with double ovens and all that.   That said, I'm optimistic that my clock won't be terrible now.

 

-Bob N3XKB

 

On Thu, Jul 9, 2020 at 11:25 AM Keith_WE6R <keithtrinity@...> wrote:

Yes, sorry. The K3S clock trimmer TP is 32.768 Khz behind the VFO A knob.
Keith WE6R

 


Re: Loses Time

Wes Stewart
 

I wouldn't expect it either.  Nor would I accept it.  (Actually, I would, I never use the clock anyway.)

Wes  N7WS

On Thursday, July 9, 2020, 1:58:03 PM MST, Ray Maxfield <wa6vab@...> wrote:


So Your Happy with that ?

 

Un-expectable to me.   Ray WA6VAB

 

From: redarlington
Sent: Thursday, July 9, 2020 1:16 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Loses Time

 

And after all this trouble, I'm off by more than 7 seconds in 30 minutes.

 

-Bob N3XKB

 

On Thu, Jul 9, 2020 at 1:02 PM redarlington via groups.io <rdarlington=gmail.com@groups.io> wrote:

Hey guys, just to add a little info that is hopefully useful to others, I took some pictures after going through this adjustment.

 

 

I'm using a 10x probe. 100x might be better but I don't know the circuit.  I don't like loading down oscillators which could shift the frequency I'm trying to adjust.  This is a cheap but very good $120 or so frequency counter from China and is being fed around the back with a 10MHz external reference (Trimble Thunderbolt GPSDO).  This version is good out to like 6GHz.  Not a sales pitch, but my HP units can't beat it for portability.

 

I needed to use a pretty skinny probe to reach back to the PCB.  There's a hole for the tip of the probe to slip into if you can reach it (I couldn't with the original probe I tried).    Definitely ground your probe shield somewhere.  I'm clipped to a 1/4" jack for paddles.  The little hole right next to it has the trimmer pot/cap (can't quite tell from out here).  I used a ceramic blade adjustment tool, but plastic would likely be better only due to the fact that it's a tight fit and the ceramic isn't exactly bendy.  Plastic probably would get around the scope probe a little easier -at least with mine.

 

My gut feeling is to recommend some minimum warmup time like 15-20 minutes before doing this adjustment.  I turned it on and spent maybe 5 minutes looking around for the counter (lost the darn thing on the workbench -it's small!)  I've already drifted about 0.12 Hz, but this kind of thing isn't exactly a precision oscillator with double ovens and all that.   That said, I'm optimistic that my clock won't be terrible now.

 

-Bob N3XKB

 

On Thu, Jul 9, 2020 at 11:25 AM Keith_WE6R <keithtrinity@...> wrote:

Yes, sorry. The K3S clock trimmer TP is 32.768 Khz behind the VFO A knob.
Keith WE6R

 


Re: Loses Time

redarlington <rdarlington@...>
 

It just speaks to the garbage clock that Elecraft is using.  I was hopeful the cal would help but it seems to be where it was before I started.   The cheapest junk watches from Walmart keep better time than a Rolex.  Elecraft must've gone way out of their way on this clock.   Or something else is going on that I don't see.  Either way, the internal clock is useless.

-Bob

On Thu, Jul 9, 2020, 2:58 PM Ray Maxfield <wa6vab@...> wrote:

So Your Happy with that ?

 

Un-expectable to me.   Ray WA6VAB

 

From: redarlington
Sent: Thursday, July 9, 2020 1:16 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Loses Time

 

And after all this trouble, I'm off by more than 7 seconds in 30 minutes.

 

-Bob N3XKB

 

On Thu, Jul 9, 2020 at 1:02 PM redarlington via groups.io <rdarlington=gmail.com@groups.io> wrote:

Hey guys, just to add a little info that is hopefully useful to others, I took some pictures after going through this adjustment.

 

 

I'm using a 10x probe. 100x might be better but I don't know the circuit.  I don't like loading down oscillators which could shift the frequency I'm trying to adjust.  This is a cheap but very good $120 or so frequency counter from China and is being fed around the back with a 10MHz external reference (Trimble Thunderbolt GPSDO).  This version is good out to like 6GHz.  Not a sales pitch, but my HP units can't beat it for portability.

 

I needed to use a pretty skinny probe to reach back to the PCB.  There's a hole for the tip of the probe to slip into if you can reach it (I couldn't with the original probe I tried).    Definitely ground your probe shield somewhere.  I'm clipped to a 1/4" jack for paddles.  The little hole right next to it has the trimmer pot/cap (can't quite tell from out here).  I used a ceramic blade adjustment tool, but plastic would likely be better only due to the fact that it's a tight fit and the ceramic isn't exactly bendy.  Plastic probably would get around the scope probe a little easier -at least with mine.

 

My gut feeling is to recommend some minimum warmup time like 15-20 minutes before doing this adjustment.  I turned it on and spent maybe 5 minutes looking around for the counter (lost the darn thing on the workbench -it's small!)  I've already drifted about 0.12 Hz, but this kind of thing isn't exactly a precision oscillator with double ovens and all that.   That said, I'm optimistic that my clock won't be terrible now.

 

-Bob N3XKB

 

On Thu, Jul 9, 2020 at 11:25 AM Keith_WE6R <keithtrinity@...> wrote:

Yes, sorry. The K3S clock trimmer TP is 32.768 Khz behind the VFO A knob.
Keith WE6R

 


Re: Loses Time

Michael
 

I doubt if that is what he means Really, really doubt it: 5.6 minutes in 24 hours.

 

Mike

W8TRN

 

Sent from Mail for Windows 10

 

From: Ray Maxfield
Sent: Thursday, July 9, 2020 14:58
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Loses Time

 

So Your Happy with that ?

 

Un-expectable to me.   Ray WA6VAB

 

From: redarlington
Sent: Thursday, July 9, 2020 1:16 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Loses Time

 

And after all this trouble, I'm off by more than 7 seconds in 30 minutes.

 

-Bob N3XKB

 

On Thu, Jul 9, 2020 at 1:02 PM redarlington via groups.io <rdarlington=gmail.com@groups.io> wrote:

Hey guys, just to add a little info that is hopefully useful to others, I took some pictures after going through this adjustment.

 

 

I'm using a 10x probe. 100x might be better but I don't know the circuit.  I don't like loading down oscillators which could shift the frequency I'm trying to adjust.  This is a cheap but very good $120 or so frequency counter from China and is being fed around the back with a 10MHz external reference (Trimble Thunderbolt GPSDO).  This version is good out to like 6GHz.  Not a sales pitch, but my HP units can't beat it for portability.

 

I needed to use a pretty skinny probe to reach back to the PCB.  There's a hole for the tip of the probe to slip into if you can reach it (I couldn't with the original probe I tried).    Definitely ground your probe shield somewhere.  I'm clipped to a 1/4" jack for paddles.  The little hole right next to it has the trimmer pot/cap (can't quite tell from out here).  I used a ceramic blade adjustment tool, but plastic would likely be better only due to the fact that it's a tight fit and the ceramic isn't exactly bendy.  Plastic probably would get around the scope probe a little easier -at least with mine.

 

My gut feeling is to recommend some minimum warmup time like 15-20 minutes before doing this adjustment.  I turned it on and spent maybe 5 minutes looking around for the counter (lost the darn thing on the workbench -it's small!)  I've already drifted about 0.12 Hz, but this kind of thing isn't exactly a precision oscillator with double ovens and all that.   That said, I'm optimistic that my clock won't be terrible now.

 

-Bob N3XKB

 

On Thu, Jul 9, 2020 at 11:25 AM Keith_WE6R <keithtrinity@...> wrote:

Yes, sorry. The K3S clock trimmer TP is 32.768 Khz behind the VFO A knob.
Keith WE6R

 

 


Re: Loses Time

Ray Maxfield
 

So Your Happy with that ?

 

Un-expectable to me.   Ray WA6VAB

 

From: redarlington
Sent: Thursday, July 9, 2020 1:16 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Loses Time

 

And after all this trouble, I'm off by more than 7 seconds in 30 minutes.

 

-Bob N3XKB

 

On Thu, Jul 9, 2020 at 1:02 PM redarlington via groups.io <rdarlington=gmail.com@groups.io> wrote:

Hey guys, just to add a little info that is hopefully useful to others, I took some pictures after going through this adjustment.

 

 

I'm using a 10x probe. 100x might be better but I don't know the circuit.  I don't like loading down oscillators which could shift the frequency I'm trying to adjust.  This is a cheap but very good $120 or so frequency counter from China and is being fed around the back with a 10MHz external reference (Trimble Thunderbolt GPSDO).  This version is good out to like 6GHz.  Not a sales pitch, but my HP units can't beat it for portability.

 

I needed to use a pretty skinny probe to reach back to the PCB.  There's a hole for the tip of the probe to slip into if you can reach it (I couldn't with the original probe I tried).    Definitely ground your probe shield somewhere.  I'm clipped to a 1/4" jack for paddles.  The little hole right next to it has the trimmer pot/cap (can't quite tell from out here).  I used a ceramic blade adjustment tool, but plastic would likely be better only due to the fact that it's a tight fit and the ceramic isn't exactly bendy.  Plastic probably would get around the scope probe a little easier -at least with mine.

 

My gut feeling is to recommend some minimum warmup time like 15-20 minutes before doing this adjustment.  I turned it on and spent maybe 5 minutes looking around for the counter (lost the darn thing on the workbench -it's small!)  I've already drifted about 0.12 Hz, but this kind of thing isn't exactly a precision oscillator with double ovens and all that.   That said, I'm optimistic that my clock won't be terrible now.

 

-Bob N3XKB

 

On Thu, Jul 9, 2020 at 11:25 AM Keith_WE6R <keithtrinity@...> wrote:

Yes, sorry. The K3S clock trimmer TP is 32.768 Khz behind the VFO A knob.
Keith WE6R

 


Re: Loses Time

redarlington <rdarlington@...>
 

And after all this trouble, I'm off by more than 7 seconds in 30 minutes.

-Bob N3XKB

On Thu, Jul 9, 2020 at 1:02 PM redarlington via groups.io <rdarlington=gmail.com@groups.io> wrote:
Hey guys, just to add a little info that is hopefully useful to others, I took some pictures after going through this adjustment.


I'm using a 10x probe. 100x might be better but I don't know the circuit.  I don't like loading down oscillators which could shift the frequency I'm trying to adjust.  This is a cheap but very good $120 or so frequency counter from China and is being fed around the back with a 10MHz external reference (Trimble Thunderbolt GPSDO).  This version is good out to like 6GHz.  Not a sales pitch, but my HP units can't beat it for portability.

I needed to use a pretty skinny probe to reach back to the PCB.  There's a hole for the tip of the probe to slip into if you can reach it (I couldn't with the original probe I tried).    Definitely ground your probe shield somewhere.  I'm clipped to a 1/4" jack for paddles.  The little hole right next to it has the trimmer pot/cap (can't quite tell from out here).  I used a ceramic blade adjustment tool, but plastic would likely be better only due to the fact that it's a tight fit and the ceramic isn't exactly bendy.  Plastic probably would get around the scope probe a little easier -at least with mine.

My gut feeling is to recommend some minimum warmup time like 15-20 minutes before doing this adjustment.  I turned it on and spent maybe 5 minutes looking around for the counter (lost the darn thing on the workbench -it's small!)  I've already drifted about 0.12 Hz, but this kind of thing isn't exactly a precision oscillator with double ovens and all that.   That said, I'm optimistic that my clock won't be terrible now.

-Bob N3XKB

On Thu, Jul 9, 2020 at 11:25 AM Keith_WE6R <keithtrinity@...> wrote:
Yes, sorry. The K3S clock trimmer TP is 32.768 Khz behind the VFO A knob.
Keith WE6R


Re: Loses Time

redarlington <rdarlington@...>
 

Hey guys, just to add a little info that is hopefully useful to others, I took some pictures after going through this adjustment.


I'm using a 10x probe. 100x might be better but I don't know the circuit.  I don't like loading down oscillators which could shift the frequency I'm trying to adjust.  This is a cheap but very good $120 or so frequency counter from China and is being fed around the back with a 10MHz external reference (Trimble Thunderbolt GPSDO).  This version is good out to like 6GHz.  Not a sales pitch, but my HP units can't beat it for portability.

I needed to use a pretty skinny probe to reach back to the PCB.  There's a hole for the tip of the probe to slip into if you can reach it (I couldn't with the original probe I tried).    Definitely ground your probe shield somewhere.  I'm clipped to a 1/4" jack for paddles.  The little hole right next to it has the trimmer pot/cap (can't quite tell from out here).  I used a ceramic blade adjustment tool, but plastic would likely be better only due to the fact that it's a tight fit and the ceramic isn't exactly bendy.  Plastic probably would get around the scope probe a little easier -at least with mine.

My gut feeling is to recommend some minimum warmup time like 15-20 minutes before doing this adjustment.  I turned it on and spent maybe 5 minutes looking around for the counter (lost the darn thing on the workbench -it's small!)  I've already drifted about 0.12 Hz, but this kind of thing isn't exactly a precision oscillator with double ovens and all that.   That said, I'm optimistic that my clock won't be terrible now.

-Bob N3XKB

On Thu, Jul 9, 2020 at 11:25 AM Keith_WE6R <keithtrinity@...> wrote:
Yes, sorry. The K3S clock trimmer TP is 32.768 Khz behind the VFO A knob.
Keith WE6R

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