[Elecraft] SOLD - RE: FS: S-Box, Y-Box and MOXA 4 port serial over IP server

[K5WA]

All items found a new home amazingly quickly.  I shouldn’t have stepped away 
from the computer.  

 

By the way, typo on N6TV’s call below.  Sorry to move you to Texas,  Bob.  
Typical of my contesting error rate unfortunately.

 

From: K5WA  
Sent: Tuesday, October 20, 2020 9:41 PM
To: 'Elecraft@mailman.qth.net' 
Subject: FS: S-Box, Y-Box and MOXA 4 port serial over IP server

 

All the discussion of Y-Boxes and S-Boxes prompted this email as I’m still 
clearing items surplus to my needs:

 

1.  N6TV S-Box in pristine condition and acquired in 2018.  Jumpered and 
labeled for an ACOM 2000A and RemoteRig RC-1216H setup.  $60
2.  N6TV Y-Box in pristine condition and acquired in 2018.  Jumpered and 
labeled for K3/K3S ACC to AMP AUX.  $60
3.  MOXA NPort 6450 4 port serial server (over IP) in pristine condition.  
This is really a neat piece of equipment if you need 4 serial ports in a remote 
location.  $100  

I think the new price is $499. https://www.neteon.net/moxa-nport-6450 

 

The S-Box and Y-Box can be bundled together for $100 if you want both.  Bob, 
N5TV,  does a fantastic job of setting up the jumpers for you and labeling the 
boxes if you need him to like I did.  Jumpers can be set for your specific 
needs.

 

Please contact me off list if interested.

 

Thanks for the bandwidth,

 

Bob K5WA

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[Elecraft] FS: S-Box, Y-Box and MOXA 4 port serial over IP server

[K5WA]

All the discussion of Y-Boxes and S-Boxes prompted this email as I'm still
clearing items surplus to my needs:

 

1.  N6TV S-Box in pristine condition and acquired in 2018.  Jumpered and
labeled for an ACOM 2000A and RemoteRig RC-1216H setup.  $60
2.  N6TV Y-Box in pristine condition and acquired in 2018.  Jumpered and
labeled for K3/K3S ACC to AMP AUX.  $60
3.  MOXA NPort 6450 4 port serial server (over IP) in pristine
condition.  This is really a neat piece of equipment if you need 4 serial
ports in a remote location.  $100  

I think the new price is $499. https://www.neteon.net/moxa-nport-6450 

 

The S-Box and Y-Box can be bundled together for $100 if you want both.  Bob,
N5TV,  does a fantastic job of setting up the jumpers for you and labeling
the boxes if you need him to like I did.  Jumpers can be set for your
specific needs.

 

Please contact me off list if interested.

 

Thanks for the bandwidth,

 

Bob K5WA

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Re: [Elecraft] KPA1500 / K3 Mystery

[Fred Jensen]

I'll second Jack's observation Bruce.  "Most" of the time, the K3 
switches power levels properly ... but, the key lies in Jack's 
description of how it works.  The K3 gets notice of "events" from the 
KPA which treats the notices as "fire and forget."  The event causes the 
K3 to take some action(s) and go to some state.  It seems to be great at 
that. It also needs to remember that state [conceptually, "KPA in 
standby"] regardless of what goes on thereafter.  It seems there are 
things you can do after putting the KPA in off or standby that foul up 
this state memory.  With a background in aircraft systems for the 
military, the peripheral fire and forget mode is a non-starter for me.  
I just developed the habit of always checking the K3 PWR OUT setting 
before transmitting.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 10/20/2020 3:08 PM, Jack Brindle via Elecraft wrote:

Bruce;

Did you ever resolve the issue?

The KPA500 and KPA1500 send events to the K3, not commands. The distinction is 
important - an event simply reports a state change in the amplifier. It is up 
to the K3 to decide what to do in response, if anything.
Thus when tapping a and button the KPA simply sends an event indicate that the 
button had been tapped, the K3 receives that and decides to do a band switch 
(if needed).
The fact that the K3 is indicating a response (in the VFO B display) says the 
K3 is indeed receiving the event properly. That means the KPA1500 is working 
properly, so the issue is in the K3.

Since the K3 sets the correct power for the KPA OP mode, it should be expected 
the the K3 is also selecting the high power setting when the KPA indicates that 
it is in STBY mode. The is the same power level that would be used if the K3 is 
powered up with the KPA left turned off. From personal experience I have many 
times found the power not to be what I expected after some special operating 
activity, like Field Day where we run just 5 watts. Turning the Power knob 
usually fixes the problem quite nicely.

73!
Jack, W6FB
Elecraft Engineering



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Re: [Elecraft] extension of the length of the K3/KPA acc cable

[Ken K6MR]

You can buy Amphenol cables that are 15 wire with any combination of connectors 
you want from places like Mouser and Digikey.

Ken K6MR

From: Eric Norris
Sent: Tuesday, October 20, 2020 12:57
To: Howard Sherer
Cc: elecraft
Subject: Re: [Elecraft] extension of the length of the K3/KPA acc cable

In my book, get an N6TV Y-Box V3, he can supply proper cables of any
length.

73 Eric WD6DBM

On Tue, Oct 20, 2020, 10:27 AM Howard Sherer  wrote:

> I have the older style thick heavy cable from Elecraft for connection
> between the K3 and the KPA amp. It is just a little too short to fit my
> application. What is the best way to extend its length without  any pin
> conflicts to the missing pins? Can a standard VGA cable be used on the K2
> side?
>
> Howard AE3T
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Re: [Elecraft] KPA1500 / K3 Mystery

[Jack Brindle via Elecraft]

Bruce;

Did you ever resolve the issue?

The KPA500 and KPA1500 send events to the K3, not commands. The distinction is 
important - an event simply reports a state change in the amplifier. It is up 
to the K3 to decide what to do in response, if anything.
Thus when tapping a and button the KPA simply sends an event indicate that the 
button had been tapped, the K3 receives that and decides to do a band switch 
(if needed).
The fact that the K3 is indicating a response (in the VFO B display) says the 
K3 is indeed receiving the event properly. That means the KPA1500 is working 
properly, so the issue is in the K3.

Since the K3 sets the correct power for the KPA OP mode, it should be expected 
the the K3 is also selecting the high power setting when the KPA indicates that 
it is in STBY mode. The is the same power level that would be used if the K3 is 
powered up with the KPA left turned off. From personal experience I have many 
times found the power not to be what I expected after some special operating 
activity, like Field Day where we run just 5 watts. Turning the Power knob 
usually fixes the problem quite nicely.

73!
Jack, W6FB
Elecraft Engineering


> On Oct 18, 2020, at 9:28 AM, ockm...@gmail.com wrote:
> 
> YES, when switching the KPA1500 between OPER and STBY, the K3 displays the
> messages "KPA500 OPERATE" and "KPA500 STANDBY", depending.
> 
> 
> 
> YES, the K3 is set CONFIG: POWER SET is Per Band.
> 
> 
> 
> YES, when in STBY on the KPA1500, I set the "no amp" power to 100 watts, and
> when in OPER, I set drive level per band; usually less than 30 watts, which
> gets close to the legal limit.
> 
> 
> 
> Still the same results as described below.
> 
> 
> 
> 73 de Bruce, N7TY
> 
> Yuma, AZ
> 
>  www.qsl.net/n7ty
> 
> 
> 
> From: ockm...@gmail.com  
> Sent: October 18, 2020 06:32
> To: 'elecraft@mailman.qth.net' 
> Subject: KPA1500 / K3 Mystery
> 
> 
> 
> I made a recent change to the "Band Change-> STBY" setting on the KPA1500,
> changing from NO to YES.  I did this to ensure the AMP doesn't have any wild
> SWR or PWR spikes before the ATU has a chance to "remember" it's setting
> after a band change.
> 
> 
> 
> Issue:  When switching the AMP from OPER to STBY, the K3 is supposed to
> switch from the drive power setting (~25 watts) in OPER, to 100 watts in
> STBY, it does not, it remains at the drive power setting.  I am 99% sure I
> have all the cabling and settings set correctly in the K3 and KPA1500.  I
> went through and manually reset the power settings on each band to let the
> K3 and KPA1500 "re-learn" the change made, however, still no joy.
> 
> 
> 
> Jim, W6YA, and I have been going back and forth, however neither of us have
> had any luck.
> 
> 
> 
> Do you KPA1500/K3 owners out there have any ideas or suggestions?
> 
> 
> 
> 73 de Bruce, N7TY
> 
> Yuma, AZ
> 
> www.qsl.net/n7ty  
> 
> 
> 
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Re: [Elecraft] KPA500 Transformer

[Jack Brindle via Elecraft]

Gee Alan, we get told that all the time, specially by coworkers… 

As for the transformer, the tech support guys give good advice here. Place the 
rubber disks below the transformer in the appropriate places, and one above as 
the instructions indicate.
Essentially you want to get the transformer off the base chassis enough to keep 
it from vibrating against it. We all worry about tightening the nut down too 
much, which is why we added the torque wrench suggestion in the manual. But it 
does need to be rather tight to keep things from vibrating. Also, make sure all 
the screws in the chassis are tight. The hum can come from other parts as well. 
Making sure thins like the rectifier board are properly tight can help 
alleviate this situation also.

Someone asked about keeping the rear-panel power on. I have the first KPA500 
still in operation, and it has seen very little rear-panel off time during its 
life. In this situation, the power supply is on, and the microcontroller is on 
in sleep mode. This means the unit does draw current, but not very much. I have 
seen no effect from it on my power bill. During months when I participate in 
contests I can’t say that - running 500 or so watts for long periods each 
weekend does spin the power meter a bit.

Thanks for the compliment, we work very hard to create, build and support 
products that make you guys happy. I think it shows.

73!
Jack, W6FB
Elecraft Engineering


> On Oct 20, 2020, at 2:27 PM, Alan - G4GNX  wrote:
> 
> Guys. My comment was sarcastic and has a smiley on the end of it. Elecraft 
> know what they're doing and I would not expect anyone to tell them they got 
> it wrong!
> 
> 73,
> 
> Alan. G4GNX
> 
> 
> -- Original Message --
> From: "Nr4c" 
> To: "Alan - G4GNX" 
> Cc: "Elecraft Reflector" 
> Sent: 20/10/2020 19:42:31
> Subject: Re: [Elecraft] KPA500 Transformer
> 
>> No,  no. The torque wrench is used to insure the proper torque is applied.
>> 
>> A torque wrench is not a torque multiplier, it is a measurement instrument.
>> 
>> Sent from my iPhone
>> ...nr4c. bill
>> 
>> 
>>> On Oct 20, 2020, at 6:33 AM, Alan - G4GNX  wrote:
>>> 
>>> Then perhaps someone needs to educate Elecraft not to specify use of a 
>>> torque wrench, in their assembly instructions. ;-)
>>> 
>>> 73,
>>> 
>>> Alan. G4GNX
>>> 
>>> 
> 
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Re: [Elecraft] KPA500 Transformer

[Alan - G4GNX]

Guys. My comment was sarcastic and has a smiley on the end of it. 
Elecraft know what they're doing and I would not expect anyone to tell 
them they got it wrong!


73,

Alan. G4GNX


-- Original Message --
From: "Nr4c" 
To: "Alan - G4GNX" 
Cc: "Elecraft Reflector" 
Sent: 20/10/2020 19:42:31
Subject: Re: [Elecraft] KPA500 Transformer


 No,  no. The torque wrench is used to insure the proper torque is applied.

A torque wrench is not a torque multiplier, it is a measurement instrument.

Sent from my iPhone
...nr4c. bill



 On Oct 20, 2020, at 6:33 AM, Alan - G4GNX  wrote:

 Then perhaps someone needs to educate Elecraft not to specify use of a torque 
wrench, in their assembly instructions. ;-)

 73,

 Alan. G4GNX




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Re: [Elecraft] 2m internal transverter PTT out

[w4sc]

This is disappointing news.  I just purchased a K3S-10 to use mainly as a uWave 
IF.

I looked at the K144XV and KXV3B schematics.  The fix will need to be 
implemented on the KXV3B.

The K144XV uController monitors the 7R voltage from the baseboard, that is 
routed through KXV3B, and when this voltage is 0, the 5R voltage is turned off, 
and 5T ON, sending +5V out the BNC if it is strapped in.  There is not a way 
for the K144XV to determine the transition out of the RX to the TX state was 
NOT intended for it.  So the K144XV is being cycled RX/TX, enabled or not.

I have determined a fix that would require 1 trace cut, 2 diodes, and 2 
resistors, and 4 connections on the KXV3B.  It is rather simple in circuit 
design concept, but may be physically difficult to implement.  Possibly with 
SMT components and a very small PCB.  I do not know how much room is available, 
or if the trace cut mentioned can be made.

Ben W4SC

Sent from Mail for Windows 10

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Re: [Elecraft] extension of the length of the K3/KPA acc cable

[Rick Bates, NK7I]

In a post long ago, 2 meters was posted by Elecraft, as the max end-end 
length of the ACC cabling (two sections of stock cable).  Cabling longer 
than that /MAY /affect the signal timing, causing errors (their words).  
I ran my temporary station that way (for a couple years) until I got the 
new shack room built and had no issues with cabling.


The cost of the proper cable from Elecraft is reasonable or there are 
other sources (at your own risk).  You bought a Ferrari of a radio, are 
you going to cripple it with questionable tires?  Don't cheap out, do it 
right.


I also agree, the N6TV boxes (and cables) simplify the wiring (not 
neaten to any great extent but it helps, it's great but not miraculous 
:-P) .  If you go that route, Bob will work with you for the proper 
pieces based on your needs.  Neatness helps minimize noise and other 
issues too.


73,
Rick NK7I


On 10/20/2020 12:55 PM, Eric Norris wrote:

In my book, get an N6TV Y-Box V3, he can supply proper cables of any
length.

73 Eric WD6DBM

On Tue, Oct 20, 2020, 10:27 AM Howard Sherer  wrote:


I have the older style thick heavy cable from Elecraft for connection
between the K3 and the KPA amp. It is just a little too short to fit my
application. What is the best way to extend its length without  any pin
conflicts to the missing pins? Can a standard VGA cable be used on the K2
side?

Howard AE3T
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Re: [Elecraft] extension of the length of the K3/KPA acc cable

[Eric Norris]

In my book, get an N6TV Y-Box V3, he can supply proper cables of any
length.

73 Eric WD6DBM

On Tue, Oct 20, 2020, 10:27 AM Howard Sherer  wrote:

> I have the older style thick heavy cable from Elecraft for connection
> between the K3 and the KPA amp. It is just a little too short to fit my
> application. What is the best way to extend its length without  any pin
> conflicts to the missing pins? Can a standard VGA cable be used on the K2
> side?
>
> Howard AE3T
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Re: [Elecraft] KPA500 Transformer

[Josh Fiden]

Yes. 100% of the time I’ve specified using a calibrated torque wrench or driver 
in an assembly procedure is to prevent *too much* torque from being applied. 

73
Josh W6XU

Sent from my mobile device

> On Oct 20, 2020, at 11:43 AM, Nr4c  wrote:
> 
>  No,  no. The torque wrench is used to insure the proper torque is applied. 
> 
> A torque wrench is not a torque multiplier, it is a measurement instrument. 
> 

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Re: [Elecraft] KPA500 Transformer

[Harry Yingst via Elecraft]

 Here is a video that shows what the root issue may actually be.
https://youtu.be/80XN7OHoBSc




On Tuesday, October 20, 2020, 02:11:51 PM EDT, David Gilbert 
 wrote:  
 
 
Because everyone who now owns a KPA500 owned it years ago and was a list 
member back then??

Besides, I've been a member of this list since at least 2008 and I can 
recall many KPA500 owners still complaining about hum even after trying 
to follow all of the advice given here.  It's still a valid topic and 
not outside the list boundary rules.

And of course, every single post in this recent KPA500 hum thread has 
been clearly identified in the headline and could be easily ignored or 
deleted by anyone who was able to read it.  You could have done so 
yourself in far less time than it took you to write your post.

Dave  AB7E



On 10/19/2020 9:34 PM, Eric Norris wrote:
> The torque spec is called out in the manual.  Why not use a torque wrench?
> Can we please not resurrect the KPA500 hum thread already beat to death
> multiple times years ago?  Or does everyone need to chime in yet again?
>
> 55 inch-pounds.
>
> 73 Eric WD6DBM

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Re: [Elecraft] KPA500 Transformer

[Nr4c]

 No,  no. The torque wrench is used to insure the proper torque is applied. 

A torque wrench is not a torque multiplier, it is a measurement instrument. 

Sent from my iPhone
...nr4c. bill


> On Oct 20, 2020, at 6:33 AM, Alan - G4GNX  wrote:
> 
> Then perhaps someone needs to educate Elecraft not to specify use of a 
> torque wrench, in their assembly instructions. ;-)
> 
> 73,
> 
> Alan. G4GNX
> 
> 
> -- Original Message --
> From: "Bert" 
> To: elecraft@mailman.qth.net
> Sent: 20/10/2020 05:15:21
> Subject: Re: [Elecraft] KPA500 Transformer
> 
>> Toroidal transformers cause very little acoustic hum, unless the core
>> is not tightly wound or the copper wire windings are loose!
>> 
>> If you have to tighten the mounting bolt with a torque wrench
>> to get the transformer quiet, something is wrong!
>> 
>> Bert VE3NR
>> 
> 
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Re: [Elecraft] KPA500 Transformer

[David Gilbert]

Because everyone who now owns a KPA500 owned it years ago and was a list 
member back then??


Besides, I've been a member of this list since at least 2008 and I can 
recall many KPA500 owners still complaining about hum even after trying 
to follow all of the advice given here.  It's still a valid topic and 
not outside the list boundary rules.


And of course, every single post in this recent KPA500 hum thread has 
been clearly identified in the headline and could be easily ignored or 
deleted by anyone who was able to read it.  You could have done so 
yourself in far less time than it took you to write your post.


Dave  AB7E



On 10/19/2020 9:34 PM, Eric Norris wrote:

The torque spec is called out in the manual.  Why not use a torque wrench?
Can we please not resurrect the KPA500 hum thread already beat to death
multiple times years ago?  Or does everyone need to chime in yet again?

55 inch-pounds.

73 Eric WD6DBM


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Re: [Elecraft] 2m internal transverter PTT out

[Joe Subich, W4TV]

Set the "band Outputs" correctly (page 19 of the K3 Owners Manual) and
build a discrete logic (TTL/CMOS) band decoder to select PTT to the
2 meter or HF/6m amplifier.

Alternatively, get a band decoder that works on the frequency data
from CAT/RS232 (like microHAM Station Master) and allow it to select
PTT to the 2 meter on HF?6m amplifier based on the CAT data.

73,

   ... Joe, W4TV


On 2020-10-20 12:14 PM, Rajiv Dewan via Elecraft wrote:

Nice solution.

Unfortunately for me, I am trying to operate remotely.  I may just have to get 
a web switch and turn the amp on and off.  I am hoping that some one has a 
better solution.

Raj, N2RD


On Oct 20, 2020, at 11:52 AM,   wrote:

Raj...
I have the same issue, but a less elegant solution.  My 2 Meter amplifier
has a remote head that has the keying input located on the back of it.  I
opened it up and wired a toggle switch in line with the circuit with an LED.
I labeled it STBY/OPR like on my Ameritron AL-1200.  I just flip the 2 meter
amp "out" of the PTT circuit when I'm not using it.

Thanks,
Hank
K4HYJ

-Original Message-
From: elecraft-boun...@mailman.qth.net  
mailto:elecraft-boun...@mailman.qth.net>> On
Behalf Of Rajiv Dewan via Elecraft
Sent: Tuesday, October 20, 2020 9:34 AM
To: Elecraft@mailman.qth.net 
Subject: [Elecraft] 2m internal transverter PTT out

Dear Elecrafters,

   I have a K3 with an internal 2m transverter that I use with an external
amp.  Initially I had the amp connected to PTT-out but that would key the 2m
amp if I transmitted on any band.  To help with this, I put the optional
jumper on P8 in the transverter so that it put out 5v on ant3 (2m out) while
transmitting.  I then built a simple NPN grounded emitter circuit to key the
2m amp by grounding its PTT-in when 5v show up on output of the transverter.
Here is the shocker:  5v show up on 2m transverter out whenever I transmit
on ANY band.  How disappointing.  Am I missing something?  Is there a simple
fix?

Raj, N2RD


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[Elecraft] FS New Elecraft W2 w/ Two 2 kW Sample Heads

[Doug Hensley]

FS is my last W2-A with two of the 2w to 2kW sampling heads.  All unused.  
Documentation is on "E-on-line".

No cables.  Use your own choice of RG8, RG8x or RG-58.  Price through Elecraft 
is $379 plus 179 plus your tax & shipping.

Will sell total package for $395 plus $8 USPS to upper-48.  You save 
approximately $240.

QSL to purchase.

Cheers,

Doug W5JV



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Re: [Elecraft] extension of the length of the K3/KPA acc cable

[Rajiv Dewan via Elecraft]

The VGA cables are no good. Although they have 15 pins on each side, many are 
not through wired.  Many important pins are not connected at all, and some are 
shorted inside.

Raj

> On Oct 20, 2020, at 1:26 PM, Howard Sherer  wrote:
> 
> I have the older style thick heavy cable from Elecraft for connection
> between the K3 and the KPA amp. It is just a little too short to fit my
> application. What is the best way to extend its length without  any pin
> conflicts to the missing pins? Can a standard VGA cable be used on the K2
> side?
> 
> Howard AE3T
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Re: [Elecraft] K3S - Alpha 87a combo - loss of keying amp

[Jim Brown]

On 10/20/2020 4:22 AM, Kimo Chun wrote:

In a K3S tested with two Alpha 87a amps using RF sensing to change band and
tuning the K3S appears to easily trip the amp into Fault mode.


For a couple of years, I have had two 87As on my operating desk, each 
driven by a K3, and I the only time I experienced any issues when 
changing bands was when I screwed up and transmitted into the wrong 
antenna.Both of those 87As have the auto-tuning feature, which was added 
several years after the amp was introduced. Not all 87As have it, older 
amps require the replacement of a PROM, and after the company has been 
sold several times, it's no longer available.


The auto-tuning system must be trained, by band segment. It's covered in 
the manual, which can be downloaded. That training can be tricky, 
depending on what the previous owner might have done. And the feature 
must be turned on, by simultaneously pushing two of the buttons. I found 
that it works quite well when working into reasonably well matched 
loads, but its tuning range is pretty limited, and falls apart as the 
mismatch approaches 2:1. It's a Pi-L output network, not an antenna 
tuner.


One of those 87As has been replaced by a KPA1500, and it DOES 
occasionally go into Fault mode when changing bands, but it matches a 
FAR greater range of loads. I didn't replace the 87A because I was 
unhappy with it, but to get legal limit on 6M.


73, Jim K9YC
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[Elecraft] extension of the length of the K3/KPA acc cable

[Howard Sherer]

I have the older style thick heavy cable from Elecraft for connection
between the K3 and the KPA amp. It is just a little too short to fit my
application. What is the best way to extend its length without  any pin
conflicts to the missing pins? Can a standard VGA cable be used on the K2
side?

Howard AE3T
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Re: [Elecraft] acknowledgement of post test

[Don Wilhelm]

Gmail is doing that for you.  They do you the "favor" of not repeating 
what you sent.  Several folks have posted questions about that behavior.


73,
Don W3FPR

On 10/20/2020 12:28 PM, Rich NE1EE wrote:

Despite having the correct settings, I have not been receiving my own posts, 
and, because I use a client email aggregator, not the web, I don't know if my 
posts make.

I contacted the listmaster. The reply was to the effect that sometimes it 
happens, and we don't know why.

So I am running 2 tests
- originate a post
- reply to a post

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Re: [Elecraft] 2m internal transverter PTT out

[Terry Price]

Raj,

There are two ways to deal with this.

First you can use DIGOUT1 to key an external relay which controls where the
common PTT goes, either to an HF amp or a 2m amp. In the menu, set DIGOUT1
to on for 2m only. A small, low current 12v relay connected between 12VDC
and pin 11 on the 15pin HD connector on the back. Let the common of the
relay go to the PTT jack, NC to your HF amp and NO to your 2m amp.

Second is DIGOUT0 which when KIO3 is set to TRN or HF-TRN goes low when you
select a transverter band (anything about 6m). This could also key a small
12v relay to steer PTT the proper direction. As above.

Hope this helps.

Terry Price - W8ZN
Directive Systems and Engineering
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Re: [Elecraft] 2m internal transverter PTT out

[K4HYJ via Elecraft]

Maybe a web controlled appliance plug?  I have one that operates a
dehumidifier that I can operate with an app on my iPhone.  Use something
like that that has a relay inside - just wire it up for your amp main.

 

From: Rajiv Dewan  
Sent: Tuesday, October 20, 2020 12:15 PM
To: h...@optilink.us
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] 2m internal transverter PTT out

 

Nice solution.

 

Unfortunately for me, I am trying to operate remotely.  I may just have to
get a web switch and turn the amp on and off.  I am hoping that some one has
a better solution. 

 

Raj, N2RD





On Oct 20, 2020, at 11:52 AM, mailto:h...@optilink.us> >
mailto:h...@optilink.us> > wrote:

 

Raj...
I have the same issue, but a less elegant solution.  My 2 Meter amplifier
has a remote head that has the keying input located on the back of it.  I
opened it up and wired a toggle switch in line with the circuit with an LED.
I labeled it STBY/OPR like on my Ameritron AL-1200.  I just flip the 2 meter
amp "out" of the PTT circuit when I'm not using it.

Thanks,
Hank
K4HYJ

-Original Message-
From:  
elecraft-boun...@mailman.qth.net < 
elecraft-boun...@mailman.qth.net> On
Behalf Of Rajiv Dewan via Elecraft
Sent: Tuesday, October 20, 2020 9:34 AM
To:   Elecraft@mailman.qth.net
Subject: [Elecraft] 2m internal transverter PTT out

Dear Elecrafters,

  I have a K3 with an internal 2m transverter that I use with an external
amp.  Initially I had the amp connected to PTT-out but that would key the 2m
amp if I transmitted on any band.  To help with this, I put the optional
jumper on P8 in the transverter so that it put out 5v on ant3 (2m out) while
transmitting.  I then built a simple NPN grounded emitter circuit to key the
2m amp by grounding its PTT-in when 5v show up on output of the transverter.
Here is the shocker:  5v show up on 2m transverter out whenever I transmit
on ANY band.  How disappointing.  Am I missing something?  Is there a simple
fix?

Raj, N2RD
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delivered to   h...@optilink.us

 

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Re: [Elecraft] acknowledgement of post test

[wa2...@gmail.com]

You can enable a Gmail setting on your account to cc or bcc you on every 
message you send. Of course this doesn't indicate if the forum received and 
posted your message but you would have a copy of what you sent.You can log onto 
the forum website to check if your message was received in case you don't see 
it included in the subsequent thread. If it is not there you can resend it from 
your Gmail "Sent" folder. Ken WA2LBI LG G6 -- Original message--From: 
David HerringDate: Tue, Oct 20, 2020 12:52To: Rich NE1EE;Cc: 
Elecraft@mailman.qth.net;Subject:Re: [Elecraft] acknowledgement of post 
testRich,

In my experience, this is a “feature” of gmail. Apparently they assume that you 
should not receive a copy of your own posts.  I went through this same exercise 
a while back.  Didn’t find a solution.  I just assume my posts make it and they 
seemingly do. 

73,
David - N5DCH



> On Oct 20, 2020, at 10:41 AM, Rich NE1EE <73.de.ne...@gmail.com> wrote:
> 
> reply to my own message from the
 list
> 
> __
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Re: [Elecraft] acknowledgement of post test

[Rich NE1EE]

On 2020-10-20 10:50:-0600, David Herring wrote:

>Rich,
>
>In my experience, this is a “feature” of gmail. Apparently they assume that 
>you should not receive a copy of your own posts.  I went through this same 
>exercise a while back.  Didn’t find a solution.  I just assume my posts make 
>it and they seemingly do. 
>
>73,
>David - N5DCH

I vaguely understand this...that is, I completely get your point, but not sure 
what gmail does...

nonetheless...I did get a copy of an email I originated in gmail, which seems 
to imply that this is not a gmail issue. That is, why would gmail decide that 
it is OK to send me a post from the list that I originated, but not OK to send 
me one that is a reply to one from the list?


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Re: [Elecraft] acknowledgement of post test

[Rich NE1EE]

I ran these tests --- have not logged in to see what messages were received, 
but one person replied to the msg off list, so it got through

originated an email to the list - got my own post back, and got a bounce msg, 
too, because I asked for both

replied to a post sent to me personally, but in reply to my list post - got the 
bounce, but not the msg

replied to a post from someone else about a different matter - got the bounce, 
but not the msg

replied to my own message, in the once case where I received it from the list  
- got the bounce, but not the msg


Because this list is different, at least for me, when I reply, I usually don't 
get elecraft as the addressee, I get others. Sometimes elecraft shows up in the 
CC place. So my habit now is to "reply all" which captures all the addressees. 
I then delete the individuals, unless I specifically want to sent there, and 
replace all the addressees with one address, the elecraft mailman address. That 
ensures that I am sending back to the list, which is what I want to do most of 
the time. It seems to work.

As you can see from above, if I originate a message, I get it from the list 
server, but if I reply, I don't. Does this have summat to do with the way email 
headers are formed, and what mailman is using to determine the potential list 
of addressees? So even though I replied, my email address is not attached to a 
header that mailman uses to determine who gets the replies? If I originate, 
there are no other email addresses in the headers, so I /have/ to show up in 
the right header, but if I reply...?



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Re: [Elecraft] acknowledgement of post test

[David Herring]

Rich,

In my experience, this is a “feature” of gmail. Apparently they assume that you 
should not receive a copy of your own posts.  I went through this same exercise 
a while back.  Didn’t find a solution.  I just assume my posts make it and they 
seemingly do. 

73,
David - N5DCH



> On Oct 20, 2020, at 10:41 AM, Rich NE1EE <73.de.ne...@gmail.com> wrote:
> 
> reply to my own message from the list
> 
> __
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> Message delivered to david.n5...@gmail.com 

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Re: [Elecraft] acknowledgement of post test

[Rich NE1EE]

reply to my own message from the list

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Re: [Elecraft] JIM's KPA 500 transformer [was: KPA500 Transformer]

[Rich NE1EE]

Elecraft post acknowledgement - reply to direct post by another

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Re: [Elecraft] acknowledgement of post test

[Rich NE1EE]

Despite having the correct settings, I have not been receiving my own posts, 
and, because I use a client email aggregator, not the web, I don't know if my 
posts make.

I contacted the listmaster. The reply was to the effect that sometimes it 
happens, and we don't know why.

So I am running 2 tests
- originate a post
- reply to a post

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Re: [Elecraft] 2m internal transverter PTT out

[Rich NE1EE]

acknowledgement of reply to post test

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[Elecraft] acknowledgement of post test

[Rich NE1EE]

~R~

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Re: [Elecraft] JIM's KPA 500 transformer [was: KPA500 Transformer]

[Don Wilhelm]

Jim,

If your KPA500 is older, there was a change to the transformer mounting 
which added a couple washers to the assembly - both under and above the 
transformer.  Contact supp...@elecraft.com for details and availability 
of the kit.





On 2020-10-20 8:11, jimn4kh wrote:
I wasn't my intention to resurrect an old thread. I checked the 
archives before posting my message yesterday. I found a little info 
but not much. Perhaps I missed it. I delayed going to the list but 
Elecraft tech support is apparently really backed up because I've 
gotten zero response to my emails and voicemails beyond one email 
with the hum mitigation tech note I mentioned before. I thought 
perhaps the larger community had a specific solution. Judging from 
the widely varied responses I've gotten obviously not. I've 
tightened, loosened, and moved the transformer around multiple times 
with no change. I'll go get a torque wrench and try that but I cant 
imagine it resolving the problem given how loud it is. Ill take it 
all apart first and try the procedure once and see if it helps. I 
just don't like having to solve problems through experimentation on a 
$2k+ amplifier.

Jim N4KH

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Re: [Elecraft] 2m internal transverter PTT out

[Rajiv Dewan via Elecraft]

Nice solution.

Unfortunately for me, I am trying to operate remotely.  I may just have to get 
a web switch and turn the amp on and off.  I am hoping that some one has a 
better solution. 

Raj, N2RD

> On Oct 20, 2020, at 11:52 AM,   wrote:
> 
> Raj...
> I have the same issue, but a less elegant solution.  My 2 Meter amplifier
> has a remote head that has the keying input located on the back of it.  I
> opened it up and wired a toggle switch in line with the circuit with an LED.
> I labeled it STBY/OPR like on my Ameritron AL-1200.  I just flip the 2 meter
> amp "out" of the PTT circuit when I'm not using it.
> 
> Thanks,
> Hank
> K4HYJ
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net 
>   > On
> Behalf Of Rajiv Dewan via Elecraft
> Sent: Tuesday, October 20, 2020 9:34 AM
> To: Elecraft@mailman.qth.net 
> Subject: [Elecraft] 2m internal transverter PTT out
> 
> Dear Elecrafters,
> 
>   I have a K3 with an internal 2m transverter that I use with an external
> amp.  Initially I had the amp connected to PTT-out but that would key the 2m
> amp if I transmitted on any band.  To help with this, I put the optional
> jumper on P8 in the transverter so that it put out 5v on ant3 (2m out) while
> transmitting.  I then built a simple NPN grounded emitter circuit to key the
> 2m amp by grounding its PTT-in when 5v show up on output of the transverter.
> Here is the shocker:  5v show up on 2m transverter out whenever I transmit
> on ANY band.  How disappointing.  Am I missing something?  Is there a simple
> fix?
> 
> Raj, N2RD
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Re: [Elecraft] 2m internal transverter PTT out

[K4HYJ via Elecraft]

Raj...
I have the same issue, but a less elegant solution.  My 2 Meter amplifier
has a remote head that has the keying input located on the back of it.  I
opened it up and wired a toggle switch in line with the circuit with an LED.
I labeled it STBY/OPR like on my Ameritron AL-1200.  I just flip the 2 meter
amp "out" of the PTT circuit when I'm not using it.

Thanks,
Hank
K4HYJ

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Rajiv Dewan via Elecraft
Sent: Tuesday, October 20, 2020 9:34 AM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] 2m internal transverter PTT out

Dear Elecrafters,

   I have a K3 with an internal 2m transverter that I use with an external
amp.  Initially I had the amp connected to PTT-out but that would key the 2m
amp if I transmitted on any band.  To help with this, I put the optional
jumper on P8 in the transverter so that it put out 5v on ant3 (2m out) while
transmitting.  I then built a simple NPN grounded emitter circuit to key the
2m amp by grounding its PTT-in when 5v show up on output of the transverter.
Here is the shocker:  5v show up on 2m transverter out whenever I transmit
on ANY band.  How disappointing.  Am I missing something?  Is there a simple
fix?

Raj, N2RD
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Re: [Elecraft] JIM's KPA 500 transformer [was: KPA500 Transformer]

[Alan - G4GNX]

Jim.

I don't see this as resurrecting an old thread. You've asked for help in 
your particular circumstance, not to discuss the merits of a generic 
transformer.


As you seem to have done almost everything sensible, if the correct 
torque doesn't correct it, I think your only recourse is to get back on 
to Elecraft and tell them you think the transformer's faulty.


In the meantime, I guess the only thing you can do is either not use it, 
or wear headphones and try to ignore it.


73,

Alan. G4GNX




On 2020-10-20 8:11, jimn4kh wrote:

I wasn't my intention to resurrect an old thread. I checked the archives before 
posting my message yesterday. I found a little info but not much. Perhaps I 
missed it. I delayed going to the list but Elecraft tech support is apparently 
really backed up because I've gotten zero response to my emails and voicemails 
beyond one email with the hum mitigation tech note I mentioned before. I 
thought perhaps the larger community had a specific solution. Judging from the 
widely varied responses I've gotten obviously not. I've tightened, loosened, 
and moved the transformer around multiple times with no change. I'll go get a 
torque wrench and try that but I cant imagine it resolving the problem given 
how loud it is. Ill take it all apart first and try the procedure once and see 
if it helps. I just don't like having to solve problems through experimentation 
on a $2k+ amplifier.
Jim N4KH




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Re: [Elecraft] KPA500 Transformer

[Bert]

Agree 100%!!!
Bert VE3NR

On 2020-10-20 8:11, jimn4kh wrote:
I wasn't my intention to resurrect an old thread. I checked the 
archives before posting my message yesterday. I found a little info 
but not much. Perhaps I missed it. I delayed going to the list but 
Elecraft tech support is apparently really backed up because I've 
gotten zero response to my emails and voicemails beyond one email with 
the hum mitigation tech note I mentioned before. I thought perhaps the 
larger community had a specific solution. Judging from the widely 
varied responses I've gotten ovciously not. I've tightened, loosened, 
and moved the transformer around multiple times with no change. I'll 
go get a torque wrench and try that but I cant imagine it resolving 
the problem given how loud it is. Ill take it all apart first and try 
the procedure once and see if it helps. I just dont like having to 
solve problems through expermention on a $2k+ amplifier.

Jim N4KH


Sent from my Verizon, Samsung Galaxy smartphone


 Original message 
From: Eric Norris 
Date: 10/19/20 11:37 PM (GMT-06:00)
To: Bert 
Cc: "elecraft@mailman qth. net" 
Subject: Re: [Elecraft] KPA500 Transformer

The torque spec is called out in the manual.  Why not use a torque wrench?
Can we please not resurrect the KPA500 hum thread already beat to death
multiple times years ago?  Or does everyone need to chime in yet again?

55 inch-pounds.

73 Eric WD6DBM

On Mon, Oct 19, 2020, 9:15 PM Bert  wrote:

> Toroidal transformers cause very little acoustic hum, unless the core
> is not tightly wound or the copper wire windings are loose!
>
> If you have to tighten the mounting bolt with a torque wrench
> to get the transformer quiet, something is wrong!
>
> Bert VE3NR
>
>
>
>
> On 2020-10-19 19:59, Jim Spikes N4KH wrote:
> > Looking for details from anyone who resolved issues with excessive
> > transformer hum during transmit on a KPA-500.
> >
> >
> >
> > I have a hum mitigation application note sent from Elecraft tech 
support.

> > But the procedure recommended is pretty involved - removing front/side
> > panels, un-plugging connections, removing the transformer, changing
> > positions of the rubber discs, and putting it back together. Possibly
> more
> > than once, depending on the results.
> >
> >
> >
> > There is a risk of breaking something, and I'm not sure its going to
> solve
> > the problem if I'm successful. This is a new out of the box KPA500 
kit.

> >
> >
> >
> > If anybody has any lessons learned I would appreciate hearing them.
> >
> >
> >
> > Jim, N4KH
> >
> > __
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Re: [Elecraft] k2 cw filter settings

[Don Wilhelm]

Carlos,

If you change the filter width, you will also have to change the BFO 
settings to keep the passband centered at your desired sidetone pitch.


73,
Don W3FPR

On 10/20/2020 3:35 AM, carlos popelier wrote:

for the cw filter values in cw like fl2 0.70 is this 700hz?
and if you make a change to fl2 0.50 most one updating bf2 as well  to
other values
carlos on6cn


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Re: [Elecraft] KPA500 Transformer

[David Christ]

Torque wrenches are used for two reasons:

1) to make sure things are tight enough

2) to make sure things are not tightened too much.

Stating the proper torque is good engineering practice.  For common screws and 
bolts one can find the suggested torque in reference books and online.  For 
special circumstances the manufacturer should publish the proper values.

David K0LUM

> On Oct 20, 2020, at 5:31 AM, Alan - G4GNX  wrote:
> 
> Then perhaps someone needs to educate Elecraft not to specify use of a torque 
> wrench, in their assembly instructions. ;-)
> 
> 73,
> 
> Alan. G4GNX
> 
> 
> -- Original Message --
> From: "Bert" 
> To: elecraft@mailman.qth.net
> Sent: 20/10/2020 05:15:21
> Subject: Re: [Elecraft] KPA500 Transformer
> 
>> Toroidal transformers cause very little acoustic hum, unless the core
>> is not tightly wound or the copper wire windings are loose!
>> 
>> If you have to tighten the mounting bolt with a torque wrench
>> to get the transformer quiet, something is wrong!
>> 
>> Bert VE3NR
>> 
> 
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Re: [Elecraft] k2 cw filter settings

[Robert G Strickland via Elecraft]

Carlos...

The numerical values associated with the K2 filter settings are 
approximations, used mostly for reference when adjusting the filters. 
They do not indicate the "exact" filter bandwidths, etc.


Aligning the K2 filters is best accomplished following the instructions 
on Don Wihelm's site, http://www.w3fpr.com/. Look at the bottom of the 
main page for "K2 Filter Alignment." Don is an expert authority on the 
K2, and his instructions are just about the standard for aligning the 
filters.


...robert  KE2WY

On 10/20/2020 07:35 AM, carlos popelier wrote:

for the cw filter values in cw like fl2 0.70 is this 700hz?
and if you make a change to fl2 0.50 most one updating bf2 as well  to
other values
carlos on6cn



--
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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Re: [Elecraft] K3S - Alpha 87a combo - loss of keying amp

[E.H. Russell]

Kimo,

In order to keep my 87a from tripping into fault on band change, I sometimes
need to lower the drive power. About 10w seems ideal.

On my 6700 and 890s I am able to configure a low drive power for the TUNE
function. I'm not sure but think the K3 has a similar function. Of course
make sure the antenna is matched before TUNE is activated.

TKS,
73 ED W2RF





-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Kimo Chun
Sent: Tuesday, October 20, 2020 7:22 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3S - Alpha 87a combo - loss of keying amp

In a K3S tested with two Alpha 87a amps using RF sensing to change band and
tuning the K3S appears to easily trip the amp into Fault mode. When amp is
cycled between Operate and Standby to clear the Fault, K3s can no longer key
the amp unless you cycle power to the radio. Then it works properly again.

1. Manually change bands on the radio, with amp still sitting on prior band
and with the drive turned down to 5 to 8 W to try to ensure we won't trip
the amp while possibly transmitting into a momentarily high SWR of the wrong
band input circuitry? When keyed on the new band to have the amp auto-tune
it trips into Fault.
2. After cycling the amp from Standby back to Operate the K3S can no longer
key the amp. It is transmitting in apparent bypass mode as indicated by the
low RF level still indicating on the built in Watt meter of the amp.
3. This was tested with two 87a amps. Same issue.
4. Pulling the key line and shorting RCA plug at radio end does successfully
key the amp.
5. Another K3 radio with updated syn) doesn't do this.
6. I believe the pertinent default settings of the two radios were set to be
the same, though perhaps the band by band default drive setting or limit may
not have been mapped (If I understand correctly).

I am the new owner of the K3S and I have zero experience with the radio or
type. I've not set up my station yet (working on rebuilding tower and
antennas) since buying the radio.  It is about 3 years old but only used for
6 months by the prior owner and once by my group at last year's Field Day.
The radio and P3 are being loaned to a friend to use in an SO2R entry in a
contest.

Has anyone experienced this? Any ideas on what may be wrong?
Can my K3S be sending a spike of power, anyway, to cause the trip? We
haven't gotten further into verifying this or other things as we only
started this today.Thank you for any help you may provide.

Kimo Chun, KH7U
k...@lava.net
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[Elecraft] 2m internal transverter PTT out

[Rajiv Dewan via Elecraft]

Dear Elecrafters,

   I have a K3 with an internal 2m transverter that I use with an external amp. 
 Initially I had the amp connected to PTT-out but that would key the 2m amp if 
I transmitted on any band.  To help with this, I put the optional jumper on P8 
in the transverter so that it put out 5v on ant3 (2m out) while transmitting.  
I then built a simple NPN grounded emitter circuit to key the 2m amp by 
grounding its PTT-in when 5v show up on output of the transverter.  Here is the 
shocker:  5v show up on 2m transverter out whenever I transmit on ANY band.  
How disappointing.  Am I missing something?  Is there a simple fix?

Raj, N2RD
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[Elecraft] Off Topic but Funny

[Steven Stuckey]

I was getting dressed this morning with the tv on. There was a
commercial on and I was not paying attention too closely. All of sudden
they say the new K5 is available. First thing I thought of when did
Elecraft come out with a K5? Then I looked at the tv and it was for a KIA
car. Air went out of my balloon as I thought Elecraft was advertising on
tv. hihi

-- 73
Steven Stuckey - AC9GK - Indiana
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Re: [Elecraft] KPA500 Main Power - ON 24/7/365?

[Macy monkeys]

What surge protector are you using? 

John K7FD

> On Oct 20, 2020, at 6:04 AM, KE8G  wrote:
> 
> Hi Jack,
> I've had both my KAT500 and KPA500 powered on 24/7 for the last several
> years, as I operate them remotely from my second home in Texas.  The
> KPA500's AC power is connected through a dedicated line, surge protector
> and battery backup.  The KAT500, which is DC powered, is connected to an
> Astron RS-35M, which is on a dedicated line, surge protector and battery
> backup.
> 
> As Tony, N2TK, stated, they need to be powered on if wanting to run
> remotely.
> 
> 73 de Jim - KE8G
> 
> On Tue, Oct 20, 2020 at 8:27 AM N2TK via Elecraft 
> wrote:
> 
>> Hi John,
>> Both my KPA500 and KPA1500 are on a shelf in the basement, literally right
>> under my feet. The last time I shut them off was when I went to KP2M last
>> February.
>> If the power switch isn't on I can't tun them on from Elecraft's remote
>> software.
>> N2TK, Tony
>> 
>> -Original Message-
>> From: elecraft-boun...@mailman.qth.net 
>> On Behalf Of Jack W9JH
>> Sent: Tuesday, October 20, 2020 12:17 AM
>> To: elecraft@mailman.qth.net
>> Subject: [Elecraft] KPA500 Main Power - ON 24/7/365?
>> 
>> Is there any harm in leaving the KPA500 rear MAIN Power Switch ‘ON',
>> 24/7/365? (not the front panel power button).
>> 
>> I have done that with my KPA500 at the home station with no problem, but
>> wondered about doing it at the remote site? I can operate the front panel
>> “ON” button and “OPER/STBY” switch remotely so the amp is not running
>> full-time, just the internal power supply.
>> 
>> 73,
>> Jack W9JH
>> __
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Re: [Elecraft] KPA500 Main Power - ON 24/7/365?

[KE8G]

Hi Jack,
I've had both my KAT500 and KPA500 powered on 24/7 for the last several
years, as I operate them remotely from my second home in Texas.  The
KPA500's AC power is connected through a dedicated line, surge protector
and battery backup.  The KAT500, which is DC powered, is connected to an
Astron RS-35M, which is on a dedicated line, surge protector and battery
backup.

As Tony, N2TK, stated, they need to be powered on if wanting to run
remotely.

73 de Jim - KE8G

On Tue, Oct 20, 2020 at 8:27 AM N2TK via Elecraft 
wrote:

> Hi John,
> Both my KPA500 and KPA1500 are on a shelf in the basement, literally right
> under my feet. The last time I shut them off was when I went to KP2M last
> February.
> If the power switch isn't on I can't tun them on from Elecraft's remote
> software.
> N2TK, Tony
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net 
> On Behalf Of Jack W9JH
> Sent: Tuesday, October 20, 2020 12:17 AM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] KPA500 Main Power - ON 24/7/365?
>
> Is there any harm in leaving the KPA500 rear MAIN Power Switch ‘ON',
> 24/7/365? (not the front panel power button).
>
> I have done that with my KPA500 at the home station with no problem, but
> wondered about doing it at the remote site? I can operate the front panel
> “ON” button and “OPER/STBY” switch remotely so the amp is not running
> full-time, just the internal power supply.
>
> 73,
> Jack W9JH
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Re: [Elecraft] KPA500 Main Power - ON 24/7/365?

[Rich NE1EE]

On 2020-10-20 08:25:-0400, N2TK via Elecraft wrote:
>Hi John,
>Both my KPA500 and KPA1500 are on a shelf in the basement, literally right 
>under my feet. The last time I shut them off was when I went to KP2M last 
>February.
>If the power switch isn't on I can't tun them on from Elecraft's remote 
>software.
>N2TK, Tony

I have been looking into remote switches. While I have not settled on anything, 
I am looking at remote controlled high power handling relays. Not saying that 
they are needed in this situation, but they are an option. Then you could leave 
the power switches on, close the relay, and use remote software to turn them 
on. If you are remote already, you prolly have the capability.

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Re: [Elecraft] KPA500 Main Power - ON 24/7/365?

[N2TK via Elecraft]

Hi John,
Both my KPA500 and KPA1500 are on a shelf in the basement, literally right 
under my feet. The last time I shut them off was when I went to KP2M last 
February.
If the power switch isn't on I can't tun them on from Elecraft's remote 
software.
N2TK, Tony

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Jack W9JH
Sent: Tuesday, October 20, 2020 12:17 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500 Main Power - ON 24/7/365?

Is there any harm in leaving the KPA500 rear MAIN Power Switch ‘ON', 24/7/365? 
(not the front panel power button).

I have done that with my KPA500 at the home station with no problem, but 
wondered about doing it at the remote site? I can operate the front panel “ON” 
button and “OPER/STBY” switch remotely so the amp is not running full-time, 
just the internal power supply. 

73,
Jack W9JH
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[Elecraft] K3S - Alpha 87a combo - loss of keying amp

[Kimo Chun]

In a K3S tested with two Alpha 87a amps using RF sensing to change band and
tuning the K3S appears to easily trip the amp into Fault mode. When amp is
cycled between Operate and Standby to clear the Fault, K3s can no longer
key the amp unless you cycle power to the radio. Then it works properly
again.

1. Manually change bands on the radio, with amp still sitting on prior band
and with the drive turned down to 5 to 8 W to try to ensure we won't trip
the amp while possibly transmitting into a momentarily high SWR of the
wrong band input circuitry? When keyed on the new band to have the amp
auto-tune it trips into Fault.
2. After cycling the amp from Standby back to Operate the K3S can no longer
key the amp. It is transmitting in apparent bypass mode as indicated by the
low RF level still indicating on the built in Watt meter of the amp.
3. This was tested with two 87a amps. Same issue.
4. Pulling the key line and shorting RCA plug at radio end does
successfully key the amp.
5. Another K3 radio with updated syn) doesn't do this.
6. I believe the pertinent default settings of the two radios were set to
be the same, though perhaps the band by band default drive setting or limit
may not have been mapped (If I understand correctly).

I am the new owner of the K3S and I have zero experience with the radio or
type. I've not set up my station yet (working on rebuilding tower and
antennas) since buying the radio.  It is about 3 years old but only used
for 6 months by the prior owner and once by my group at last year's Field
Day. The radio and P3 are being loaned to a friend to use in an SO2R entry
in a contest.

Has anyone experienced this? Any ideas on what may be wrong?
Can my K3S be sending a spike of power, anyway, to cause the trip? We
haven't gotten further into verifying this or other things as we only
started this today.Thank you for any help you may provide.

Kimo Chun, KH7U
k...@lava.net
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[Elecraft] K310 - F is sold

[Jim Spears]

A lucky ham stated that "this is just what he wanted" so it is on its way to
South Carolina.

 

Jim 

N1NK

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Re: [Elecraft] KPA500 Transformer

[Alan - G4GNX]

Then perhaps someone needs to educate Elecraft not to specify use of a 
torque wrench, in their assembly instructions. ;-)


73,

Alan. G4GNX


-- Original Message --
From: "Bert" 
To: elecraft@mailman.qth.net
Sent: 20/10/2020 05:15:21
Subject: Re: [Elecraft] KPA500 Transformer


Toroidal transformers cause very little acoustic hum, unless the core
is not tightly wound or the copper wire windings are loose!

If you have to tighten the mounting bolt with a torque wrench
to get the transformer quiet, something is wrong!

Bert VE3NR



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Re: [Elecraft] K2 Firmware & Software

[Ray Spreadbury via Elecraft]

Thank you Don
73 Ray G3XLG

-Original Message-
From: Don Wilhelm  
Sent: 19 October 2020 23:18
To: Ray Spreadbury ; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K2 Firmware & Software

Ray,

I don't know about any software, but the latest firmware is available - the 
most recent is MCU 2.04, IOC 1.09  They must go together - order as FWK2MCIO.  
If you have trouble finding it on the website, just email sa...@elecraft.com to 
order.

To find your currently installed K2 firmware level, hold any button while 
powering the K2 on, the firmware level will be briefly displayed.

73,
Don W3FPR

On 10/19/2020 5:25 PM, Ray Spreadbury via Elecraft wrote:
> I can't find the link to the last versions of firmware & software for 
> the K2.
> 
> I know it was some years ago, but thought it would still be available 
> on the Elecraft site.
> 

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[Elecraft] k2 cw filter settings

[carlos popelier]

for the cw filter values in cw like fl2 0.70 is this 700hz?
and if you make a change to fl2 0.50 most one updating bf2 as well  to
other values
carlos on6cn

-- 
mvg carlos popelier
regards carlos popelier
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