Re: [Elecraft] Remoting the KPA500 & KAT500?

2017-05-04 Thread Ken K6MR 
One thing to watch is the length of the USB cable. Over about 15 feet or so (I 
believe the spec is 5 meters) you’ll need an active repeater cable or some 
alternate connection method. I use an Ethernet to serial port server with a 
fiber link between the desk and the closet. Two KPAs and two KATs.

Ken K6MR

From: Harry Yingst via Elecraft
Sent: Thursday, May 4, 2017 8:02 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Remoting the KPA500 & KAT500?

More and more I'm considering remoting my KPA500 out of the shack,mostly becuse 
of the heat and secondly because of the fan noise.
In doing so it would proably make sense to move the KAT500 along with it.
Then it would be a matter of routing  one coax from the K3 to th amp, and a USB 
cable with a hub for the two usb to serial adapters for the amp and tuner to 
plug into.
I already use the control programs to oprrate the amp andtjner and rarely touch 
them.

I figured I'd ask first, since I'm pretty sure others have done this and could 
let me know if there is anything I should watch out for.

Thank you

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Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread Matt Zilmer 
That's what seemed like a normal language difference to me too.  Thanks, 
Bill.


73,

matt W6NIA


On 5/4/2017 7:11 PM, Bill Johnson wrote:

Matt, a difference in the language.  I would take them to be the same.

73,
Bill
K9YEQ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Matt 
Zilmer
Sent: Thursday, May 4, 2017 11:44 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

Sorry to be thick  Is a dry joint same as a cold joint?

Thanks and 73,

matt W6NIA


On 5/4/2017 9:12 AM, Alan. G4GNX wrote:

FWIW we thought that a relay was failing on our club's KAT500. I
bought a new one from Elecraft and replaced it without thinking about
it. They're quite cheap and it wasn't worth chancing an intermittent
relay.
Whilst I was re-assembling the tuner, I discovered that the tag washer
connecting Ant 1 to its screw terminal had developed a dry joint,
which was the real cause of the intermittency. I don't know whether it
was a manufacturing fault or someone had been heavy handed when
assembling it.

It would be worth checking soldered joints and other connections
before replacing a relay. You may need to use a magnifying glass as it
may not show up on a meter test. Another thing to try is what we used
to do as service technicians; use an aerosol freezer spray in small
areas around the suspected area and possibly a hair dryer on a warm
setting (not hot) and observe for changes under test.

73,

Alan. G4GNX

-Original Message- From: Victor Rosenthal 4X6GP
Sent: Thursday, May 4, 2017 3:07 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 with subrx - intermittent main RX problem
and pwr out

Well, I had a relay fail on my KAT3 board. I don't remember which one.
Elecraft sent me a replacement. It wasn't hard to replace, but it
happens.

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 4 May 2017 16:46, Don Wilhelm wrote:

Olaf,

The relays used by Elecraft are quite reliable, so I suspect that is
not a reasonable source of the problem.  In more than 12 years of
repairing the Elecraft legacy gear (more than 1200 repairs), I have
had to replace only a small handful of relays due to failure.  I have
replaced several where the builder has distorted the case with a soldering iron.

I would double and triple check the SUBIN and SUBOUT connectors.  A
connector failure is much more likely than a relay failure.

You might contact K3support to see if they have encountered a
situation like yours before.

73,
Don W3FPR

On 5/4/2017 3:31 AM, la3rk wrote:

I have a K3 approx 8 years old. Fully equipped with subrx, 100W PA,
antenna tuner and in/out module.

When I connect the subrx, the main rx sometimes loses signal and at
the same time power out goes to zero.

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--
"A delay is better than a disaster."
-- unknown

Matt Zilmer, W6NIA
[Shiraz]

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--
"A delay is better than a disaster."
-- unknown

Matt Zilmer, W6NIA
[Shiraz]

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[Elecraft] Remoting the KPA500 & KAT500?

2017-05-04 Thread Harry Yingst via Elecraft 
More and more I'm considering remoting my KPA500 out of the shack,mostly becuse 
of the heat and secondly because of the fan noise.
In doing so it would proably make sense to move the KAT500 along with it.
Then it would be a matter of routing  one coax from the K3 to th amp, and a USB 
cable with a hub for the two usb to serial adapters for the amp and tuner to 
plug into.
I already use the control programs to oprrate the amp andtjner and rarely touch 
them.

I figured I'd ask first, since I'm pretty sure others have done this and could 
let me know if there is anything I should watch out for.

Thank you 

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Re: [Elecraft] Can I overcharge the batteries in my KX3

2017-05-04 Thread Bill Johnson 
Matt, thank you for the refresher.  I had forgotten the info you espoused even 
though I was an FT back in the KX3 earliest days!

72 & 73,
Bill
K9YEQ, FT'er for K2, KX1, KX3, KXPA100,  KAT500, W2, etc. 

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Matt 
Zilmer
Sent: Thursday, May 4, 2017 6:07 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Can I overcharge the batteries in my KX3

The KX3's internal charger is intended to charge _NiMH_ batteries.  Its output 
is a constant 200 mA.  At that current level, you are unlikely to overcharge 
the AA cells, and all that will happen is that they'll stay warm.

Theway I handle mobile ops with batteries is to run the charger in 4 hour 
durations, and periodically check the BT voltage on the DISPlay. 
For NiMH, if the voltage is 10.8V or higher, I just disable the charger.  10.8V 
is very close to 100%. Others recommend charging up to 11.1V, which is 100% for 
most formulations (e.g., Tenergy).  Not sure what Sanyo recommends for 
Eneloops.  You might wan to read up on that.

Specifically for Eneloops - they hold their charge quite well, so there is 
little need to top them off as youmotor alongunless you'redrawing current from 
them all the time.  If the 13.8V input is connected, it is diode steered with 
the battery output and any current you draw will be from the external power 
connection. In this arrangement, the highest voltage wins.

73,

matt W6NIA


On 5/4/2017 3:38 PM, Jerry wrote:
> Hello,
>
>   
>
> I am about to take a month long trip to California and then back to 
> Virginia starting this Sunday. I am taking my KX3 along with some 
> accessories so I would like to know - is it possible to overcharge the 
> NiCads or Enloops. I have a system set up on my motorcycle that will 
> provide 13.8vdc at 3 amps clamped.  for charging some 12 v sealed lead 
> batteries and I am wondering if I use this output voltage and set the 
> timer to 8 hours on the KX3 charging system, can I overcharge the 
> batteries and ruin them or worse the internals of the KX3?
>
>   
>
> Thank you.
>
>   
>
> Best regards,
>
>   
>
> Jerry, W1IE
>
> __
> Elecraft mailing list
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>
> This list hosted by: http://www.qsl.net Please help support this email 
> list: http://www.qsl.net/donate.html Message delivered to 
> mzil...@roadrunner.com

--
"A delay is better than a disaster."
-- unknown

Matt Zilmer, W6NIA
[Shiraz]

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Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread Bill Johnson 
Matt, a difference in the language.  I would take them to be the same.

73,
Bill
K9YEQ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Matt 
Zilmer
Sent: Thursday, May 4, 2017 11:44 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

Sorry to be thick  Is a dry joint same as a cold joint?

Thanks and 73,

matt W6NIA


On 5/4/2017 9:12 AM, Alan. G4GNX wrote:
> FWIW we thought that a relay was failing on our club's KAT500. I 
> bought a new one from Elecraft and replaced it without thinking about 
> it. They're quite cheap and it wasn't worth chancing an intermittent 
> relay.
> Whilst I was re-assembling the tuner, I discovered that the tag washer 
> connecting Ant 1 to its screw terminal had developed a dry joint, 
> which was the real cause of the intermittency. I don't know whether it 
> was a manufacturing fault or someone had been heavy handed when 
> assembling it.
>
> It would be worth checking soldered joints and other connections 
> before replacing a relay. You may need to use a magnifying glass as it 
> may not show up on a meter test. Another thing to try is what we used 
> to do as service technicians; use an aerosol freezer spray in small 
> areas around the suspected area and possibly a hair dryer on a warm 
> setting (not hot) and observe for changes under test.
>
> 73,
>
> Alan. G4GNX
>
> -Original Message- From: Victor Rosenthal 4X6GP
> Sent: Thursday, May 4, 2017 3:07 PM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3 with subrx - intermittent main RX problem 
> and pwr out
>
> Well, I had a relay fail on my KAT3 board. I don't remember which one.
> Elecraft sent me a replacement. It wasn't hard to replace, but it 
> happens.
>
> 73,
> Victor, 4X6GP
> Rehovot, Israel
> Formerly K2VCO
> http://www.qsl.net/k2vco/
>
> On 4 May 2017 16:46, Don Wilhelm wrote:
>> Olaf,
>>
>> The relays used by Elecraft are quite reliable, so I suspect that is 
>> not a reasonable source of the problem.  In more than 12 years of 
>> repairing the Elecraft legacy gear (more than 1200 repairs), I have 
>> had to replace only a small handful of relays due to failure.  I have 
>> replaced several where the builder has distorted the case with a soldering 
>> iron.
>>
>> I would double and triple check the SUBIN and SUBOUT connectors.  A 
>> connector failure is much more likely than a relay failure.
>>
>> You might contact K3support to see if they have encountered a 
>> situation like yours before.
>>
>> 73,
>> Don W3FPR
>>
>> On 5/4/2017 3:31 AM, la3rk wrote:
>>> I have a K3 approx 8 years old. Fully equipped with subrx, 100W PA, 
>>> antenna tuner and in/out module.
>>>
>>> When I connect the subrx, the main rx sometimes loses signal and at 
>>> the same time power out goes to zero.
>
> __
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> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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>
> This list hosted by: http://www.qsl.net Please help support this email 
> list: http://www.qsl.net/donate.html Message delivered to 
> mzil...@roadrunner.com

--
"A delay is better than a disaster."
-- unknown

Matt Zilmer, W6NIA
[Shiraz]

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Re: [Elecraft] Can I overcharge the batteries in my KX3

2017-05-04 Thread Mark Petiford via Elecraft 
First of all, forget the Nicads.  The KX3 isn't really designed for Nicads, and 
they have a lot of problems such as excessive self discharge, and leakage.  If 
you want rechargeable cells, use modern low self discharge (LSD) nickle-metal 
hydride (NiMH) cells.  Eneloops are one example, and probably the most popular. 
 The KX3 manual discusses the use of them in the Internal Batteries section.  
Usually LSD NiMH cells are sold in a charged condition.  Once installed, they 
can sit in your radio for long periods losing very little of their charge.  I 
have never seen a modern NiMH cell leak, unless they are discharged to less 
than 1.0 volts per cell.  The KX3 prevents this with its adjustable battery 
warning and automatic shutdown.


Assuming you are using LSD NiMh cells of at least 2000mah in size.  The KXBC3 
charger is a 200ma - 250 ma (approx.) constant current charger which is about 
0.1 times the capacity of the cells.  That is a perfect constant current charge 
for 2000mah cells or larger.  Cell manufacturers' guidelines for these cells 
state that is isn't likely that you will overcharge using this method but they 
suggest you not leave the charge on constantly like you would when using a 
trickle charger.  (A trickle charge rate would be about 1/4th of the KXBC3 
charge rate, if my memory is correct).  Since the KXBC3 also monitors cell 
temperature, it complies with the manufacturers' recommendations.  It will only 
charge while the cell temperature is within limits, and will suspend charging 
until the temperature returns to normal.

In reality, MiMH cells work best when charged somewhat longer than necessary.  
That allows the lowest charged cells to be brought up to a fully charged 
condition.  They are self-leveling.


Mark
KE6BB   

On Thursday, May 4, 2017 3:40 PM, Jerry  wrote:
 

 Hello,

 

I am about to take a month long trip to California and then back to Virginia
starting this Sunday. I am taking my KX3 along with some accessories so I
would like to know - is it possible to overcharge the NiCads or Enloops. I
have a system set up on my motorcycle that will provide 13.8vdc at 3 amps
clamped.  for charging some 12 v sealed lead batteries and I am wondering if
I use this output voltage and set the timer to 8 hours on the KX3 charging
system, can I overcharge the batteries and ruin them or worse the internals
of the KX3?

 

Thank you.

 

Best regards,

 

Jerry, W1IE

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Re: [Elecraft] Can I overcharge the batteries in my KX3

2017-05-04 Thread Matt Zilmer 
The KX3's internal charger is intended to charge _NiMH_ batteries.  Its 
output is a constant 200 mA.  At that current level, you are unlikely to 
overcharge the AA cells, and all that will happen is that they'll stay 
warm.


Theway I handle mobile ops with batteries is to run the charger in 4 
hour durations, and periodically check the BT voltage on the DISPlay. 
For NiMH, if the voltage is 10.8V or higher, I just disable the 
charger.  10.8V is very close to 100%. Others recommend charging up to 
11.1V, which is 100% for most formulations (e.g., Tenergy).  Not sure 
what Sanyo recommends for Eneloops.  You might wan to read up on that.


Specifically for Eneloops - they hold their charge quite well, so there 
is little need to top them off as youmotor alongunless you'redrawing 
current from them all the time.  If the 13.8V input is connected, it is 
diode steered with the battery output and any current you draw will be 
from the external power connection. In this arrangement, the highest 
voltage wins.


73,

matt W6NIA


On 5/4/2017 3:38 PM, Jerry wrote:

Hello,

  


I am about to take a month long trip to California and then back to Virginia
starting this Sunday. I am taking my KX3 along with some accessories so I
would like to know - is it possible to overcharge the NiCads or Enloops. I
have a system set up on my motorcycle that will provide 13.8vdc at 3 amps
clamped.  for charging some 12 v sealed lead batteries and I am wondering if
I use this output voltage and set the timer to 8 hours on the KX3 charging
system, can I overcharge the batteries and ruin them or worse the internals
of the KX3?

  


Thank you.

  


Best regards,

  


Jerry, W1IE

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--
"A delay is better than a disaster."
-- unknown

Matt Zilmer, W6NIA
[Shiraz]

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[Elecraft] Can I overcharge the batteries in my KX3

2017-05-04 Thread Jerry 
Hello,

 

I am about to take a month long trip to California and then back to Virginia
starting this Sunday. I am taking my KX3 along with some accessories so I
would like to know - is it possible to overcharge the NiCads or Enloops. I
have a system set up on my motorcycle that will provide 13.8vdc at 3 amps
clamped.  for charging some 12 v sealed lead batteries and I am wondering if
I use this output voltage and set the timer to 8 hours on the KX3 charging
system, can I overcharge the batteries and ruin them or worse the internals
of the KX3?

 

Thank you.

 

Best regards,

 

Jerry, W1IE

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Re: [Elecraft] XV 432 For sale

2017-05-04 Thread George Cortez via Elecraft 


  Sold to Dave AD6A in record time!
Thanks Dave!
George NE2I




From: Dave AD6A 
 To: George Cortez  
 Sent: Thursday, May 4, 2017 4:46 PM
 Subject: Re: [Elecraft] XV 432 For sale
   
I'll buy it from you George!

Dave
AD6A

Sent from my  iPhone 7 Plus

On May 4, 2017, at 2:42 PM, George Cortez via Elecraft 
 wrote:

Hello Folks, I found my inoperative 432 and figured I'd pass it on to someone 
who might be able to fix it up and use it.I never got it to work from the start 
so it has no time on the finals. Asking 265 plus the shipping paypal.
George NE2I
845 489 8563



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[Elecraft] XV 432 For sale

2017-05-04 Thread George Cortez via Elecraft 
Hello Folks, I found my inoperative 432 and figured I'd pass it on to someone 
who might be able to fix it up and use it.I never got it to work from the start 
so it has no time on the finals. Asking 265 plus the shipping paypal.
George NE2I
845 489 8563 



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Re: [Elecraft] For Sale, unbuilt K2 with many options

2017-05-04 Thread Ken Allen via Elecraft 
Thanks to all who offered comments or offered to buy the kits.  The kits
have been sold.

Ken KB8KE

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken
Allen via Elecraft
Sent: Wednesday, April 26, 2017 2:14 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] For Sale, unbuilt K2 with many options

I'm embarrassed to admit that I purchased my K2 kit, #5534, at Hamvention in
2006 and it is still not completed.  I worked on it right after the purchase
and then life got in the way when I was about to do the first power on
testing at the end of Part 1 assembly.   I built most of the added modules
first thinking I would start with the smaller, less complex boards.  After I
retired two years later, I picked up the kit again only to realize tremors
in my hands would not allow me to do the soldering any longer.  At this
point I have the following for sale:
 
Basic K2 - built to Part 1 of the assembly manual pg 42 but not tested
KSB2 - built - untested
K60XV - built - untested
KNB2 - built - untested
K160RX - built - untested
KIO2 - built - untested
KDSP2 - un-built still in box
KAT100-2 - un-built still in box
 
I also have the Rework Eliminators with appropriate changes made to the K2
assembly to this point.
 
EC2 - assembled - intended to have the KAT100 and KPA100 in the EC2. The
KPA100 kit is not included.
 
Also have the KRC2 - assembled and  used with my K3.
 
I have over $2000 invested. For all the above including shopping within the
continental US, I am asking $1000, but will consider reasonable offers.
 
Contact Ken Allen at kb...@yahoo.com with any questions or offers. I can
supply photos of the assembled item on request.

 

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Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread Alan Baker 

Solder lug/solder tag/tag washer all the same thing. :-)

Perhaps instead of dry joint I should have said "broken joint". The bond 
between the solder lug and the connecting wire had become broken, 
resulting in the effect of a dry joint. This could have been caused by 
someone being over enthusiastic with a screwdriver, resulting in the lug 
being put under great strain by the securing screw being turned and 
breaking the solder joint by force rather than by movement whilst the 
solder was cooling at manufacture.


73,

Alan. G4GNX

On 04/05/2017 18:28, Fred Jensen wrote:
"Two countries separated by a common language."  I believe "tag 
washer" is a "solder lug" on our side of the Atlantic.  I think Alan 
might mean the screw connection on that lug becoming intermittent due 
to oxidation and/or inadequate tightening.  Generally speaking, cold 
solder joints are "cold" immediately after the soldering process and 
don't develop later, although I've seen that happen due to very minor 
extended vibration of the joint.


73,

Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn


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Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread Alan. G4GNX 

Matt.

You are not at all thick. We all have to learn somewhere. The only time you 
could be considered thick is if you never asked the question. :-)


The wiki/dictionary description of dry and cold joints describes slightly 
different observable effects but to all intents and purposes a dry or cold 
solder joint will produce the same result. Both usually result in a breakage 
of the bond between the two components that are soldered. The simple 
solution is to re-solder the joint using sufficient heat to melt the old 
solder. You can either remove the old solder and apply new solder, or you 
can add a little flux when you heat the joint. I would prefer to remove the 
old solder and replace it with new flux cored solder. If you haven't done 
much of this type of work, probably the easiest way to remove old solder is 
with some "solder wick" which you can purchase for pennies on eBay. Place 
the wick braid on the solder to be removed and apply a hot soldering iron. 
The wick will soak up the solder and if it doesn't remove it all first time, 
re-apply the wick a 2nd or 3rd time.


One thing you ABSOLUTELY MUST do before you start ANY work inside your rig, 
is to observe ANTI-STATIC precautions. Use a wrist strap specially made for 
the job and preferably use an anti-static mat. DO NOT EVER connect yourself 
directly to any anti-static ground source - you could DIE!


73,

Alan. G4GNX

-Original Message- 
From: Matt Zilmer

Sent: Thursday, May 4, 2017 5:43 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr 
out


Sorry to be thick  Is a dry joint same as a cold joint?

Thanks and 73,

matt W6NIA 


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Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread Fred Jensen 
"Two countries separated by a common language."  I believe "tag washer" 
is a "solder lug" on our side of the Atlantic.  I think Alan might mean 
the screw connection on that lug becoming intermittent due to oxidation 
and/or inadequate tightening.  Generally speaking, cold solder joints 
are "cold" immediately after the soldering process and don't develop 
later, although I've seen that happen due to very minor extended 
vibration of the joint.


73,

Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn

On 5/4/2017 9:43 AM, Matt Zilmer wrote:

Sorry to be thick  Is a dry joint same as a cold joint?

Thanks and 73,

matt W6NIA


On 5/4/2017 9:12 AM, Alan. G4GNX wrote:
FWIW we thought that a relay was failing on our club's KAT500. I 
bought a new one from Elecraft and replaced it without thinking about 
it. They're quite cheap and it wasn't worth chancing an intermittent 
relay.
Whilst I was re-assembling the tuner, I discovered that the tag 
washer connecting Ant 1 to its screw terminal had developed a dry 
joint, which was the real cause of the intermittency. I don't know 
whether it was a manufacturing fault or someone had been heavy handed 
when assembling it.


It would be worth checking soldered joints and other connections 
before replacing a relay. You may need to use a magnifying glass as 
it may not show up on a meter test. Another thing to try is what we 
used to do as service technicians; use an aerosol freezer spray in 
small areas around the suspected area and possibly a hair dryer on a 
warm setting (not hot) and observe for changes under test.


73,

Alan. G4GNX


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Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread GRANT YOUNGMAN 
I had this happen with the 2M module, too.  What I do now with these is try to 
support the little teflon insulator in the socket from the rear with a small 
flat-blade screwdriver — at least the ones I get to that way.

Took a while to figure out what the problem was, since everything looks 
“normal" from the outside …


> On May 4, 2017, at 1:05 PM, Ron D'Eau Claire  wrote:
> 
> An intermittent or open circuit problem that has occurred on occasion is
> caused by misaligning TMP male and pressing it too hard into the socket.
> ...
> 
> The solution is to visually inspect the various TMP connectors on the KRX3
> board as well as those on the KREF3 and Aux KSYN3 board. Looking into the
> socket you should see the metal receptacle inside the white plastic
> (Teflon?). IF all you can see is plastic, you may have pushed the metal
> socket back out of the connector. 
> 
> 

Grant NQ5T
K3 #2091, KX3 #8342



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Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread Ron D'Eau Claire 
An intermittent or open circuit problem that has occurred on occasion is
caused by misaligning TMP male and pressing it too hard into the socket.
What can happen is that the male pin hits the metal edge of the female
socket inside the connector and actually pushes the metal socket out of its
housing. The result is that the female socket edge is just resting against
the male pin rather than having the male pin inside the socket even though
the connector appears properly mated. This results in an intermittent
contact. 

The solution is to visually inspect the various TMP connectors on the KRX3
board as well as those on the KREF3 and Aux KSYN3 board. Looking into the
socket you should see the metal receptacle inside the white plastic
(Teflon?). IF all you can see is plastic, you may have pushed the metal
socket back out of the connector. 

You can get access to the back of the connector and push the metal
receptacle back in place but it will likely tend to bend again more easily
now that it has been pushed out of place once. Be especially careful of it
when plugging in the TMP cable.

73, Ron AC7AC 

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of la3rk
Sent: Thursday, May 4, 2017 12:32 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

I have a K3 approx 8 years old. Fully equipped with subrx, 100W PA, antenna
tuner and in/out module.

When I connect the subrx, the main rx sometimes loses signal and at the same
time power out goes to zero.

Looking at the diagrams, I suspect there is an intermittent contact problem
in relay K1 shown on the SUBIN schematic. This relay is responsible for
sending antenna signals to the splitter when using the subrx and also
connects the splitter output back to the main rx. The same contacts on the
relay is also a path for the low level tx signal. An intermittent contact on
this relay and particularly contacts 3-4 could explain the behaviour I see.

Has anybody experience relay failures and if yes have they managed to change
out the relay?

Sending the K3 back to Elecraft is not a preferred option as shipping
charges to/from Norway will be fairly expensive.

Regards
LA3RK - Olaf Devik



-
73 de LA3RK Olaf
--
View this message in context:
http://elecraft.365791.n2.nabble.com/K3-with-subrx-intermittent-main-RX-prob
lem-and-pwr-out-tp7630294.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread Matt Zilmer 

Sorry to be thick  Is a dry joint same as a cold joint?

Thanks and 73,

matt W6NIA


On 5/4/2017 9:12 AM, Alan. G4GNX wrote:
FWIW we thought that a relay was failing on our club's KAT500. I 
bought a new one from Elecraft and replaced it without thinking about 
it. They're quite cheap and it wasn't worth chancing an intermittent 
relay.
Whilst I was re-assembling the tuner, I discovered that the tag washer 
connecting Ant 1 to its screw terminal had developed a dry joint, 
which was the real cause of the intermittency. I don't know whether it 
was a manufacturing fault or someone had been heavy handed when 
assembling it.


It would be worth checking soldered joints and other connections 
before replacing a relay. You may need to use a magnifying glass as it 
may not show up on a meter test. Another thing to try is what we used 
to do as service technicians; use an aerosol freezer spray in small 
areas around the suspected area and possibly a hair dryer on a warm 
setting (not hot) and observe for changes under test.


73,

Alan. G4GNX

-Original Message- From: Victor Rosenthal 4X6GP
Sent: Thursday, May 4, 2017 3:07 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 with subrx - intermittent main RX problem 
and pwr out


Well, I had a relay fail on my KAT3 board. I don't remember which one.
Elecraft sent me a replacement. It wasn't hard to replace, but it 
happens.


73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 4 May 2017 16:46, Don Wilhelm wrote:

Olaf,

The relays used by Elecraft are quite reliable, so I suspect that is not
a reasonable source of the problem.  In more than 12 years of repairing
the Elecraft legacy gear (more than 1200 repairs), I have had to replace
only a small handful of relays due to failure.  I have replaced several
where the builder has distorted the case with a soldering iron.

I would double and triple check the SUBIN and SUBOUT connectors.  A
connector failure is much more likely than a relay failure.

You might contact K3support to see if they have encountered a situation
like yours before.

73,
Don W3FPR

On 5/4/2017 3:31 AM, la3rk wrote:

I have a K3 approx 8 years old. Fully equipped with subrx, 100W PA,
antenna
tuner and in/out module.

When I connect the subrx, the main rx sometimes loses signal and at
the same
time power out goes to zero. 


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--
"A delay is better than a disaster."
-- unknown

Matt Zilmer, W6NIA
[Shiraz]

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Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread Alan. G4GNX 
FWIW we thought that a relay was failing on our club's KAT500. I bought a 
new one from Elecraft and replaced it without thinking about it. They're 
quite cheap and it wasn't worth chancing an intermittent relay.
Whilst I was re-assembling the tuner, I discovered that the tag washer 
connecting Ant 1 to its screw terminal had developed a dry joint, which was 
the real cause of the intermittency. I don't know whether it was a 
manufacturing fault or someone had been heavy handed when assembling it.


It would be worth checking soldered joints and other connections before 
replacing a relay. You may need to use a magnifying glass as it may not show 
up on a meter test. Another thing to try is what we used to do as service 
technicians; use an aerosol freezer spray in small areas around the 
suspected area and possibly a hair dryer on a warm setting (not hot) and 
observe for changes under test.


73,

Alan. G4GNX

-Original Message- 
From: Victor Rosenthal 4X6GP

Sent: Thursday, May 4, 2017 3:07 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr 
out


Well, I had a relay fail on my KAT3 board. I don't remember which one.
Elecraft sent me a replacement. It wasn't hard to replace, but it happens.

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 4 May 2017 16:46, Don Wilhelm wrote:

Olaf,

The relays used by Elecraft are quite reliable, so I suspect that is not
a reasonable source of the problem.  In more than 12 years of repairing
the Elecraft legacy gear (more than 1200 repairs), I have had to replace
only a small handful of relays due to failure.  I have replaced several
where the builder has distorted the case with a soldering iron.

I would double and triple check the SUBIN and SUBOUT connectors.  A
connector failure is much more likely than a relay failure.

You might contact K3support to see if they have encountered a situation
like yours before.

73,
Don W3FPR

On 5/4/2017 3:31 AM, la3rk wrote:

I have a K3 approx 8 years old. Fully equipped with subrx, 100W PA,
antenna
tuner and in/out module.

When I connect the subrx, the main rx sometimes loses signal and at
the same
time power out goes to zero. 


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Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread brian 
Also make sure TMP connectors to and from synthesizer/KREF/Subrx boards 
are secure.


Brian/K3KO

On 5/4/2017 13:46 PM, Don Wilhelm wrote:

Olaf,

The relays used by Elecraft are quite reliable, so I suspect that is not
a reasonable source of the problem.  In more than 12 years of repairing
the Elecraft legacy gear (more than 1200 repairs), I have had to replace
only a small handful of relays due to failure.  I have replaced several
where the builder has distorted the case with a soldering iron.

I would double and triple check the SUBIN and SUBOUT connectors.  A
connector failure is much more likely than a relay failure.

You might contact K3support to see if they have encountered a situation
like yours before.

73,
Don W3FPR

On 5/4/2017 3:31 AM, la3rk wrote:

I have a K3 approx 8 years old. Fully equipped with subrx, 100W PA,
antenna
tuner and in/out module.

When I connect the subrx, the main rx sometimes loses signal and at
the same
time power out goes to zero.


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Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread Victor Rosenthal 4X6GP 
Well, I had a relay fail on my KAT3 board. I don't remember which one. 
Elecraft sent me a replacement. It wasn't hard to replace, but it happens.


73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 4 May 2017 16:46, Don Wilhelm wrote:

Olaf,

The relays used by Elecraft are quite reliable, so I suspect that is not
a reasonable source of the problem.  In more than 12 years of repairing
the Elecraft legacy gear (more than 1200 repairs), I have had to replace
only a small handful of relays due to failure.  I have replaced several
where the builder has distorted the case with a soldering iron.

I would double and triple check the SUBIN and SUBOUT connectors.  A
connector failure is much more likely than a relay failure.

You might contact K3support to see if they have encountered a situation
like yours before.

73,
Don W3FPR

On 5/4/2017 3:31 AM, la3rk wrote:

I have a K3 approx 8 years old. Fully equipped with subrx, 100W PA,
antenna
tuner and in/out module.

When I connect the subrx, the main rx sometimes loses signal and at
the same
time power out goes to zero.

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Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread Guy Olinger K2AV 
Must underscore what Don said. Busted BNC connector/coax wiring is so
very common. If they were hand-done with soldering iron and NOT RG400
coax (teflon, won't melt) or were not crimped with specific tool
required for the specific connector and specific coax, they are more
likely to go bad over time. This is because BNC connections get moved
and moved and moved

The basic rule is never open up the Elecraft case until braine phartes
and *all* external connections are *ruled out*, and in extreme cases
the manual is read.  Save yourself tons of time in the long run.

73, Guy K2AV

On Thu, May 4, 2017 at 9:46 AM, Don Wilhelm  wrote:
> Olaf,
>
> The relays used by Elecraft are quite reliable, so I suspect that is not a
> reasonable source of the problem.  In more than 12 years of repairing the
> Elecraft legacy gear (more than 1200 repairs), I have had to replace only a
> small handful of relays due to failure.  I have replaced several where the
> builder has distorted the case with a soldering iron.
>
> I would double and triple check the SUBIN and SUBOUT connectors.  A
> connector failure is much more likely than a relay failure.
>
> You might contact K3support to see if they have encountered a situation like
> yours before.
>
> 73,
> Don W3FPR
>
> On 5/4/2017 3:31 AM, la3rk wrote:
>>
>> I have a K3 approx 8 years old. Fully equipped with subrx, 100W PA,
>> antenna
>> tuner and in/out module.
>>
>> When I connect the subrx, the main rx sometimes loses signal and at the
>> same
>> time power out goes to zero.
>>
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Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread Don Wilhelm 

Olaf,

The relays used by Elecraft are quite reliable, so I suspect that is not 
a reasonable source of the problem.  In more than 12 years of repairing 
the Elecraft legacy gear (more than 1200 repairs), I have had to replace 
only a small handful of relays due to failure.  I have replaced several 
where the builder has distorted the case with a soldering iron.


I would double and triple check the SUBIN and SUBOUT connectors.  A 
connector failure is much more likely than a relay failure.


You might contact K3support to see if they have encountered a situation 
like yours before.


73,
Don W3FPR

On 5/4/2017 3:31 AM, la3rk wrote:

I have a K3 approx 8 years old. Fully equipped with subrx, 100W PA, antenna
tuner and in/out module.

When I connect the subrx, the main rx sometimes loses signal and at the same
time power out goes to zero.


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[Elecraft] [OT] A Podcast Star is Born, or My 30 Seconds of Fame

2017-05-04 Thread Ian Kahn 
All,

Good morning. I had the great pleasure, earlier this week, of being a guest
on the Everything Ham Radio podcast. I shared my knowledge (I am very
hesitant to use the work "expertise") on PSK31 with podcast host Curtis,
K5CLM. The podcast is now available, and I encourage everyone to give it a
listen at:

Http://www.everythinghamradio.com/podcast/67


As a sidebar, if you ever have the opportunity to be on a podcast, give it
a shot. I was worried that I wouldn't be able to fill 45 minutes to an hour
on PSK31, and was pleasantly surprised when Curtis told me we filled 90
minutes, and I probably could have kept going (big surprise, I know! :-)
). Recording the podcast was no different than having a phone conversation
with an old friend, talking about topics we both enjoy. I had a great time,
and hopefully made a new friend in Curtis Mohr, K5CLM, the podcast's host.

73 de,

--Ian
Ian Kahn, KM4IK
Roswell, GA  EM74ua
km4ik@gmail.com
10-10 #74624  North Georgia Chapter #2038
PODXS 070 #1962
K3 #281, P3 #688 KAT500 #860, KPA500 #1468
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[Elecraft] Artifacts in headphones when monitoring my transmitted CW

2017-05-04 Thread kevino z 
I just got my Heil Pro 7 iC hooked up to my KX3. I made sure the Mic Bias was 
on, and set my monitor level to 5. Whenever I transmit CW (even with 0 W out), 
there is a strange artifact that happens as the Dit and Da's finish, kind of 
like they have a very short burst of a chirp or similar sound as they are 
finishing the transition from on to off.
Sorry, it's quite hard to describe. As I change the WPM to about 25 or so, the 
effect appears to go away, I am assuming because the time between the 
transmitted CW is reduced. However, it is quite noticeable and annoying around 
15-20 wpm, where I am hoping to be at.

I tried it with a simple pair of earbuds and the artifact is there too, so I do 
not believe it to be related to the choice of headphones. 

Does anyone have any ideas or suggestions on what it may be?
And more of importantly, how to minimize / get rid of it?

Thank you 
-Kevin (KK4YEL) 

No trees were killed in the sending of this message. However, a large number of 
electrons were terribly inconvenienced !
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[Elecraft] K3 with subrx - intermittent main RX problem and pwr out

2017-05-04 Thread la3rk 
I have a K3 approx 8 years old. Fully equipped with subrx, 100W PA, antenna
tuner and in/out module.

When I connect the subrx, the main rx sometimes loses signal and at the same
time power out goes to zero.

Looking at the diagrams, I suspect there is an intermittent contact problem
in relay K1 shown on the SUBIN schematic. This relay is responsible for
sending antenna signals to the splitter when using the subrx and also
connects the splitter output back to the main rx. The same contacts on the
relay is also a path for the low level tx signal. An intermittent contact on
this relay and particularly contacts 3-4 could explain the behaviour I see.

Has anybody experience relay failures and if yes have they managed to change
out the relay?

Sending the K3 back to Elecraft is not a preferred option as shipping
charges to/from Norway will be fairly expensive.

Regards
LA3RK - Olaf Devik



-
73 de LA3RK Olaf
--
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