[Elecraft] FS: KX2 Package

[W0FK]

Selling the following KX2 package: 
   
KX2-F Transceiver
KXAT2-F KX2 ATU
KXBT2 Internal Battery pack
KXBC2 Battery Charger
KXIO2 Real Time Clock and General Purpose outputs
Lowepro CS60 Case
KX2ACBL Accessory Cable
KXUSB
12v power cord with Anderson Powerpoles
Pro Audio Engineering Kx22 Heat sink (with integrated harmonic level
reduction update) and SidekKX panels. Original side panels included.
Printed bound manual, factory box.
   
The added heat sink allows increased power output for long periods of FT8. 
   
$1049 shipped 48 States (AK and HI will have additional charges due to
distances; sorry, no International sales), PayPal fee included, Zelle and
personal checks accepted.
   
Please contact me at lladerman AT earthlink DOT net.

NOTE, I have a SPAM filter which will generate an automatic reply for you to
fill out a form. If I catch it, I'll add your email. Sorry for the
inconvenience. Some hate it to the point they won't communicate with me,
others (myself included) could care less about it. I get hundreds of SPAM
emails, and this is how I deal with it. 
 
73, Lou, W0FK 
 



-
St. Louis, MO

"The difference between stupidity and genius is that 
genius has its limits." Albert Einstein


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Re: [Elecraft] KPA1500 LOW GAIN FAULT

[Gwen Patton]

I don't know if you're talking about what I do, Bob, but I guess I should
have said that I do that with the outdoor connectors, where they might
encounter weather. Indoor connectors are just snugged down tight enough
that they don't wiggle loose, since I disconnect them whenever lightning is
in the area.

Gwen, NG3P

On Tue, Apr 30, 2019 at 7:18 PM Bob McGraw K4TAX 
wrote:

> A good approach for those PL-259 connectors outside or exposed to the
> weather.   For those inside, that's a might bit aggressive. I just
> prefer to snug them tight, a bit more than hand tight, using some small
> channel lock pliers.
>
> 73
>
> Bob, K4TAX
>
> On 4/30/2019 5:54 PM, Gwen Patton wrote:
> > I started using a corrosion-inhibiting lube on my PL-259s, and
> religiously
> > sealing them with Coax-Seal. I tighten them very tightly as well. Since I
> > started doing that, I have no odd failures or intermittent connections in
> > my feedlines.
> >
> > 73,
> > Gwen, NG3P
> >
>
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Re: [Elecraft] KPA1500 LOW GAIN FAULT

[Bob McGraw K4TAX]

A good approach for those PL-259 connectors outside or exposed to the 
weather.   For those inside, that's a might bit aggressive. I just 
prefer to snug them tight, a bit more than hand tight, using some small 
channel lock pliers.


73

Bob, K4TAX

On 4/30/2019 5:54 PM, Gwen Patton wrote:

I started using a corrosion-inhibiting lube on my PL-259s, and religiously
sealing them with Coax-Seal. I tighten them very tightly as well. Since I
started doing that, I have no odd failures or intermittent connections in
my feedlines.

73,
Gwen, NG3P



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Re: [Elecraft] KPA1500 LOW GAIN FAULT

[Gwen Patton]

I started using a corrosion-inhibiting lube on my PL-259s, and religiously
sealing them with Coax-Seal. I tighten them very tightly as well. Since I
started doing that, I have no odd failures or intermittent connections in
my feedlines.

73,
Gwen, NG3P

On Tue, Apr 30, 2019 at 5:13 PM Bob McGraw K4TAX 
wrote:

> I've found that  hams are notorious for plugging in a multi pin
> connector and not securing the connector to be tight with the provided
> thumb screws.   The "I'll do it later, but I've got to get it on the air
> now" seems to always take precedence . The connectors will wiggle
> and back out, often leaving an intermittent connection.
>
> Likewise with PL-259 connectors.  Finger tight is simply not good enough
> for a reliable RF connection.  I use a pair of 4" Channel lock pliers to
> snug the PL-259 connectors.   And I solved many RFI issues for others
> just by tightening the PL-259's in the path.
>
> 73
>
> Bob, K4TAX
>
>
>
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Re: [Elecraft] Appears that VFO is not tracking in diversity.

[Ken K6MR]

The B VFO doesn’t do anything in diversity receive.  Both receivers are driven 
by the A synth.  B VFO is only used for a split transmit frequency if you want.



You are thinking of the VFO LINK mode where B follows A with a given split.



Ken K6MR




From: elecraft-boun...@mailman.qth.net  on 
behalf of Rich 
Sent: Tuesday, April 30, 2019 2:41:01 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Appears that VFO is not tracking in diversity.

Have read the manual and the various postings here and can not find problem.

When I turn on Diversity the B VFO does not track, and stays at the same
freq. Know it was working 6 months ago. Is there an obvious setting that
could not be correct? KC dot is flashing, Diversity ON comes up and then
DIVERSITY flashes (sometimes).  Arrow is pointing  at A and SUB is on in
display. Both receivers are working as determined by adjusting RF and AF
Separately.  Can tell it is in diversity while listening to a QSO as one
seems louder in one ear and vs/vs.
Any help appreciated.




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[Elecraft] Appears that VFO is not tracking in diversity.

[Rich]

Have read the manual and the various postings here and can not find problem.

When I turn on Diversity the B VFO does not track, and stays at the same
freq. Know it was working 6 months ago. Is there an obvious setting that
could not be correct? KC dot is flashing, Diversity ON comes up and then
DIVERSITY flashes (sometimes).  Arrow is pointing  at A and SUB is on in
display. Both receivers are working as determined by adjusting RF and AF
Separately.  Can tell it is in diversity while listening to a QSO as one
seems louder in one ear and vs/vs. 
Any help appreciated.




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Re: [Elecraft] K3 - DVR installation question

[Bill Johnson]

Great idea to use on a freq with a schedule.  I will give that a try!

73,
Bill
K9YEQ

https://wrj-tech.com/

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Dick Dievendorff
Sent: Tuesday, April 30, 2019 9:17 AM
To: K8TE 
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 - DVR installation question

Bill: I use mine in DX pileups, as I tend to get enthusiastic and holler my 
call, which could become tedious to my wife. M1 has my call, M2 has “thanks, 
you’re also 59”.  CW memories for M1 and M2 have similar function.   

I tend to use M1 less often and M2 sooner since the arrival of my KPA1500.

Good to meet you in Visalia!

73 de Dick, K6KR

> On Apr 30, 2019, at 13:58, K8TE  wrote:
> 
> In addition to contesting, I use it to call friends for a pre-setup sked. 
> They often don't show-up on-time or can't make it.  I quit after five 
> minutes with no response.
> 
> During FD several years ago, I took over the 40m station after a 
> nearby lightning strike took out the primary K3.  The back-up had no 
> DVR.  That was the longest four hours of the event (not a contest)!
> 
> I have also used the DVR for Special Event Station operations when the 
> rates slow down.  I wouldn't be without a DVR in my K3's!
> 
> 
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Re: [Elecraft] Fw: KPA 500 HV Problem.

[Bob McGraw K4TAX]

That 270 volts you refer to is the  "270 VDC" from the power supply.   
Check to see the covers are on tight and aligned correctly such that the 
safety interlock is engaged as it should be.   Make sure a wire is not 
holding the cover off and thus not seating correctly.


73

Bob, K4TAX


On 4/30/2019 2:52 PM, Mike Streeter via Elecraft wrote:
  


- Forwarded Message - From: Mike Streeter To: 
elecraft@mailman.qth.net Sent: ‎Tuesday‎, ‎April‎ ‎30‎, 
‎2019‎ ‎02‎:‎50‎:‎12‎ ‎PM‎ ‎CDTSubject: KPA 500 HV Problem.
  My KPA 500 has been running ok for several years on 120 Volts. Today I turned it off on 
the back , unplugged it and opened the top because I thought I might need to change the 
voltage tap. I did not need to change it. I replaced the top cover, plugged it in and 
turned it on at the back. All ok, but when I turned it on with the front panel button the 
HV reads .1 in standby. If I tap OPER it shows a hard fault and "270V error" 
.The Manual says this is a 270V supply failure and to recycle the mains power KPA 500 
after it is corrected. I tried recycling the power but still faults. I don't have any 
270V power from the mains, if I did it would be 240ish, not 270. The fuse block on the 
back is set to 115V.Any advice would be welcome.Mike, WM5DX.

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Re: [Elecraft] KPA1500 LOW GAIN FAULT

[Bob McGraw K4TAX]

I've found that  hams are notorious for plugging in a multi pin 
connector and not securing the connector to be tight with the provided 
thumb screws.   The "I'll do it later, but I've got to get it on the air 
now" seems to always take precedence .     The connectors will wiggle 
and back out, often leaving an intermittent connection.


Likewise with PL-259 connectors.  Finger tight is simply not good enough 
for a reliable RF connection.  I use a pair of 4" Channel lock pliers to 
snug the PL-259 connectors.   And I solved many RFI issues for others 
just by tightening the PL-259's in the path.


73

Bob, K4TAX



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[Elecraft] Volunteer needed / Ham-Com Texas

[Madelyn Gomez]

Hello Elecraft enthusiasts.

We will have a booth June 7 & 8 in Plano, Texas for Ham-Com 2019.
If anyone has a bit of time to volunteer and knowledge of the KX-Line - I
would love to hear from you!
Please contact me directly at made...@elecraft.com.

Thank you!

Madelyn Gomez
Elecraft Sales
125 Westridge Drive, Watsonville, CA.
831-763-4211
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Re: [Elecraft] KPA 500 HV Problem

[Andy Durbin]

BTW - the top cover safety interlock switch controls 60 V and 270 V supplies.   
Is it adjusted properly so the top cover closes it?

73,
Andy k3wyc



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Re: [Elecraft] Fw: KPA 500 HV Problem.

[hawley, charles j jr]

The pin diode bias supply is 270dc. That is what is failing. Has nothing to do 
with your mains.
Generally you should look at the last thing(s) you did before it failed. That 
is where you opened it up and did something. How did you determine that the HV 
was ok as is? Unplug anything...inadvertently...?
Take a look where you were inside. Something with the interlock micro switch?

Chuck Hawley
 c-haw...@illinois.edu

 Amateur Radio, KE9UW



From: elecraft-boun...@mailman.qth.net  on 
behalf of Mike Streeter via Elecraft 
Sent: Tuesday, April 30, 2019 2:52 PM
To: Elecraft Reflector
Subject: [Elecraft] Fw: KPA 500 HV Problem.



   - Forwarded Message - From: Mike Streeter To: 
elecraft@mailman.qth.net Sent: ‎Tuesday‎, ‎April‎ 
‎30‎, ‎2019‎ ‎02‎:‎50‎:‎12‎ ‎PM‎ ‎CDTSubject: KPA 500 HV Problem.
 My KPA 500 has been running ok for several years on 120 Volts. Today I turned 
it off on the back , unplugged it and opened the top because I thought I might 
need to change the voltage tap. I did not need to change it. I replaced the top 
cover, plugged it in and turned it on at the back. All ok, but when I turned it 
on with the front panel button the HV reads .1 in standby. If I tap OPER it 
shows a hard fault and "270V error" .The Manual says this is a 270V supply 
failure and to recycle the mains power KPA 500 after it is corrected. I tried 
recycling the power but still faults. I don't have any 270V power from the 
mains, if I did it would be 240ish, not 270. The fuse block on the back is set 
to 115V.Any advice would be welcome.Mike, WM5DX.

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[Elecraft] KPA 500 HV Problem

[Andy Durbin]

The 270 V fault refers to the voltage that is used to bias the pin diodes in 
the T/R switch.   That voltage is derived from the same transformer tap as 
produces the nominal 60 V supply.  When I built my KPA500 kit I measured the 
voltage and found it was much lower than 270.  Customer support told me that 
was normal and I have never seen a 270 volt fault.

I'd have no problem removing the top cover and holding the micro switch closed 
while I measured the actual voltage on the 270 V connector.  I can't suggest 
that you do that.  Perhaps a careful visual inspection of everything you 
touched when you had the cover off?

73,
Andy, k3wyc
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[Elecraft] Fw: KPA 500 HV Problem.

[Mike Streeter via Elecraft]

 

   - Forwarded Message - From: Mike Streeter To: 
elecraft@mailman.qth.net Sent: ‎Tuesday‎, ‎April‎ 
‎30‎, ‎2019‎ ‎02‎:‎50‎:‎12‎ ‎PM‎ ‎CDTSubject: KPA 500 HV Problem.
 My KPA 500 has been running ok for several years on 120 Volts. Today I turned 
it off on the back , unplugged it and opened the top because I thought I might 
need to change the voltage tap. I did not need to change it. I replaced the top 
cover, plugged it in and turned it on at the back. All ok, but when I turned it 
on with the front panel button the HV reads .1 in standby. If I tap OPER it 
shows a hard fault and "270V error" .The Manual says this is a 270V supply 
failure and to recycle the mains power KPA 500 after it is corrected. I tried 
recycling the power but still faults. I don't have any 270V power from the 
mains, if I did it would be 240ish, not 270. The fuse block on the back is set 
to 115V.Any advice would be welcome.Mike, WM5DX.
   
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Re: [Elecraft] K2 VCO Alignment Issue

[John Wingard]

Hi Don,

No problem on the delay. OK, after removing 1 turn from T5, the freq. at
TP1 (at 4000) is now 8535.14, so it did come up from the previous value,
but clearly not enough. I have 4.19 V on pin 5 of U6 and I have 4.21 V on
pin 13 of U4.

I wasn't sure of your schedule so I also put in a support request to
Elecraft but have not received a reply as of yet. Hopefully between your
help and their help I can get this resolved.

73 de John, WB4GLJ

On Tue, Apr 30, 2019 at 2:48 PM Don Wilhelm  wrote:

> John,
>
> Where did the  TP1  frequency go after you removed a turn?
>
> It is possible that the VFO frequency is not getting back to U4 pin 4 --
> the signal goes from U3 pin 6 thru C62 and then to U4.
>
> Did we verify that U6 pin 5 is near 4 volts?  What is the voltage at U4
> pin 13?
>
> Sorry to go over things, but I just returned from a few days away and my
> memory is not yet focused.
>
> 73,,
> Don W3FPR
>
> On 4/28/2019 6:00 PM, John Wingard wrote:
> > Don,
> >
> > Finally got back to the K2 this afternoon. I have confirmed that T5 is
> > on the yellow core, with 16 turns through the center on the red and 4
> > turns on the green. I mentioned earlier that I got all the toroids
> > from the Toroid Guy, so I felt confident that it was correctly wound.
> > I checked all the relay pins on K13, K14, and K15 and did not see any
> > solder bridges on any of them. Next, I pulled T5 and removed one turn
> > and re-installed. Unfortunately, nothing has changed. I'm still
> > getting that same 8.37 V at R30. Incidentally, I'm getting the 8.37 V
> > on either side of R30. Is that normal? I can also pull T5 and wind a
> > new one with the parts that came with the kit if you think that might
> > help, but something tells me that the problem lies elsewhere. I also
> > thought about pulling C72 and replacing it with another one, but
> > unfortunately there was only one of that value in the kit and I don't
> > have anything like it it my parts stash. Any new thoughts?
> >
> > de John, WB4GLJ
> >
> >
> >
> > On Sat, Apr 27, 2019 at 6:00 PM Don Wilhelm  > > wrote:
> >
> > John,
> >
> > Both frequencies are too low.
> > You have either too much capacitance or too much inductance in the
> > VFO.
> > Count the number of times the red wire goes through the center of
> > the T5
> > core - it should be 16.
> >
> > Check relays K13, K14 and K15 for solder bridges.
> >
> > Make sure the core of T5 is yellow.
> > You might have to try removing a turn from T5 if you can find no
> > other
> > cause - there have been a few K2s in the long past where the
> > permeability if the T5 core was higher than expected, and removing 1
> > turn from T5 corrected things - I have not seen that recently, but
> > I do
> > mention it 'just in case'.
> >
> > If all else fails, you may have to "wind your way" through the relay
> > connections for the VFO Range Select area using the Relay Table on
> > the
> > Schematic Key page as your guide for the paths through the relays.
> >
> > 73,
> > Don W3FPR
> >
> > On 4/27/2019 5:37 PM, John Wingard wrote:
> > > Hi Don,
> > >
> > > Thanks for the quick response. I did check C72 again. It is a 271
> > > value. I then spread the red turns on T5 as far as I could. I'd say
> > > they cover about 90+% of the toroid. I put the L30 slug at
> > mid-point
> > > of travel and measured voltage at R30 and it is still right at 8.37
> > > V.  While there I checked the frequency at TP1 and it was 8247.90,
> > > which is considerably lower than the 8913 that you expected.
> > >
> > > Next I went up to 7100 and measured the voltage at R30. Still
> > right at
> > > 8.37 V, no change. Frequency at TP1 @ 7100 was 11558.11.
> > >
> > > So, it appears that the frequency at 4000 is not within the
> > expected
> > > range, and likely not at 7100 as well. Hope this tells you
> > something
> > > because I'm stumped.
> > > I've got some plans for this evening so I may not get back on it
> > until
> > > tomorrow afternoon, but if you've got any more things for me to
> > try I
> > > will do them then.
> > >
> > > John, WB4GLJ
> > >
> > > On Sat, Apr 27, 2019 at 1:57 PM Don Wilhelm
> > mailto:donw...@embarqmail.com>
> > > >>
> > wrote:
> > >
> > > John,
> > >
> > > That high voltage is trying to reduce the capacity of the
> > varactors.
> > > Which means there is either too much capacity or too much
> > > inductance in
> > > the circuit.
> > >
> > > Check the value of C72 first - it should be marked "271".
> > Then set
> > > the
> > > L30 slug to about mid-position and spread the red turns of T5
> > > enough so
> > > the starting and 

Re: [Elecraft] KPA1500 LOW GAIN FAULT

[Victor Rosenthal 4X6GP]

Great, there is nothing that is more fun than an intermittent problem!
But there could have been dirt on one of the pins of the cables, and it 
may never happen again.

Maybe Elecraft engineers can give you some hints.
See you in the CWTs tomorrow!

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/

On 30/04/2019 20:55, Ed gilliland wrote:

Hi Vic, thanks.

That's the first thing I tried, should have included my checks in the
 first message.  Here is what I've done so far.

Put a dummy load on the antenna 1 port

Confirmed that the amp was on antenna port one

Checked the SWR between the K3 and the amp 1.1 without the K3 tuner

Re-seated all the cables on the KPA1500 rear panel

Tried the amp again and it works.  I have no idea what cable fixed
the problem.  I am using a back to back cable between the K3 and the
KPA1500 AUX ports but it's been installed for months and I've
experienced no problems.  We'll find out in tomorrow's CWT.  I think
I'll run the amp at 900 watts until I gain confidence.

WOW! WHAT A RELIEF!

Ed



On 4/30/2019 01:21, Vic Rosenthal wrote:

The first thing to do with any amplifier failure is to try it with
a dummy load. If the problem still occurs, you can rule out SWR or
RF feedback problems. It doesn’t seem like any of the above if it
occurs on all bands, but it’s easy and a good start to a systematic
diagnosis.

Victor 4X6GP


On 30 Apr 2019, at 5:35, Ed gilliland  wrote:

My KPA1500 is faulting with a low gain alarm ration 6.  This is
with 23 watts input 160-10 meters.  Any advice?

Thanks, Ed W5TM

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Re: [Elecraft] K2 VCO Alignment Issue

[Don Wilhelm]

John,

Where did the  TP1  frequency go after you removed a turn?

It is possible that the VFO frequency is not getting back to U4 pin 4 -- 
the signal goes from U3 pin 6 thru C62 and then to U4.


Did we verify that U6 pin 5 is near 4 volts?  What is the voltage at U4 
pin 13?


Sorry to go over things, but I just returned from a few days away and my 
memory is not yet focused.


73,,
Don W3FPR

On 4/28/2019 6:00 PM, John Wingard wrote:

Don,

Finally got back to the K2 this afternoon. I have confirmed that T5 is 
on the yellow core, with 16 turns through the center on the red and 4 
turns on the green. I mentioned earlier that I got all the toroids 
from the Toroid Guy, so I felt confident that it was correctly wound. 
I checked all the relay pins on K13, K14, and K15 and did not see any 
solder bridges on any of them. Next, I pulled T5 and removed one turn 
and re-installed. Unfortunately, nothing has changed. I'm still 
getting that same 8.37 V at R30. Incidentally, I'm getting the 8.37 V 
on either side of R30. Is that normal? I can also pull T5 and wind a 
new one with the parts that came with the kit if you think that might 
help, but something tells me that the problem lies elsewhere. I also 
thought about pulling C72 and replacing it with another one, but 
unfortunately there was only one of that value in the kit and I don't 
have anything like it it my parts stash. Any new thoughts?


de John, WB4GLJ



On Sat, Apr 27, 2019 at 6:00 PM Don Wilhelm > wrote:


John,

Both frequencies are too low.
You have either too much capacitance or too much inductance in the
VFO.
Count the number of times the red wire goes through the center of
the T5
core - it should be 16.

Check relays K13, K14 and K15 for solder bridges.

Make sure the core of T5 is yellow.
You might have to try removing a turn from T5 if you can find no
other
cause - there have been a few K2s in the long past where the
permeability if the T5 core was higher than expected, and removing 1
turn from T5 corrected things - I have not seen that recently, but
I do
mention it 'just in case'.

If all else fails, you may have to "wind your way" through the relay
connections for the VFO Range Select area using the Relay Table on
the
Schematic Key page as your guide for the paths through the relays.

73,
Don W3FPR

On 4/27/2019 5:37 PM, John Wingard wrote:
> Hi Don,
>
> Thanks for the quick response. I did check C72 again. It is a 271
> value. I then spread the red turns on T5 as far as I could. I'd say
> they cover about 90+% of the toroid. I put the L30 slug at
mid-point
> of travel and measured voltage at R30 and it is still right at 8.37
> V.  While there I checked the frequency at TP1 and it was 8247.90,
> which is considerably lower than the 8913 that you expected.
>
> Next I went up to 7100 and measured the voltage at R30. Still
right at
> 8.37 V, no change. Frequency at TP1 @ 7100 was 11558.11.
>
> So, it appears that the frequency at 4000 is not within the
expected
> range, and likely not at 7100 as well. Hope this tells you
something
> because I'm stumped.
> I've got some plans for this evening so I may not get back on it
until
> tomorrow afternoon, but if you've got any more things for me to
try I
> will do them then.
>
> John, WB4GLJ
>
> On Sat, Apr 27, 2019 at 1:57 PM Don Wilhelm
mailto:donw...@embarqmail.com>
> >>
wrote:
>
>     John,
>
>     That high voltage is trying to reduce the capacity of the
varactors.
>     Which means there is either too much capacity or too much
>     inductance in
>     the circuit.
>
>     Check the value of C72 first - it should be marked "271".
Then set
>     the
>     L30 slug to about mid-position and spread the red turns of T5
>     enough so
>     the starting and ending turns are adjacent.  What is the
voltage when
>     tuned to 4000 kHz?  Measure the frequency at TP1 - it should
be near
>     8913 kHz.
>
>     Then change to 40 meters - 7100 kHz - What is the R30
voltage and
>     what
>     is the VFO frequency measured at TP1.
>
>     The answer to those questions will help in determining what
to do
>     next.
>
>     73,
>     Don W3FPR
>
>     On 4/27/2019 1:32 PM, John Wingard wrote:
>     > Working on my 2nd K2 (S/N 7869) and have run into a
problem with
>     the VCO
>     > alignment. I'm getting a constant 8.37 V at R30 at 4.000 MHz..
>     I cannot
>     > change it with the full range of L30. Correct type inductor is
>     installed at
>     > L30.  Dropping the VFO down to 3.500 doesn't change it
either. I
>     

[Elecraft] K2 Tuneup, Rescue, Build; Service Legacy

[Alan D. Wilcox]

Hello,

Does your K2 need repair? Tuneup?
Want to sell it, but it needs some attention before offering it for sale? 

In addition to tuning your rig, I can also rescue a building project you might 
have started some time ago.

See what my clients have said about my construction and service work at 
http://www.eham.net/reviews/detail/6768 

Photos of the popular "Twins" -- the KPA100 and KAT100 in EC2 enclosure --  are 
at
https://wilcoxengineering.com/kpa100-in-ec2/ 

Cheers,
Alan

Alan D. Wilcox, W3DVX (K2-5373, K3-40)
570-916-9590 (cell, text)
http://amazon.com/author/alandwilcox
Williamsport, PA 17701

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Re: [Elecraft] KPA1500 LOW GAIN FAULT

[Ed gilliland]

Hi Vic, thanks.

That's the first thing I tried, should have included my checks in the 
first message.  Here is what I've done so far.


Put a dummy load on the antenna 1 port

Confirmed that the amp was on antenna port one

Checked the SWR between the K3 and the amp 1.1 without the K3 tuner

Re-seated all the cables on the KPA1500 rear panel

Tried the amp again and it works.  I have no idea what cable fixed the 
problem.  I am using a back to back cable between the K3 and the KPA1500 
AUX ports but it's been installed for months and I've experienced no 
problems.  We'll find out in tomorrow's CWT.  I think I'll run the amp 
at 900 watts until I gain confidence.


WOW! WHAT A RELIEF!

Ed



On 4/30/2019 01:21, Vic Rosenthal wrote:

The first thing to do with any amplifier failure is to try it with a dummy 
load. If the problem still occurs, you can rule out SWR or RF feedback 
problems. It doesn’t seem like any of the above if it occurs on all bands, but 
it’s easy and a good start to a systematic diagnosis.

Victor 4X6GP


On 30 Apr 2019, at 5:35, Ed gilliland  wrote:

My KPA1500 is faulting with a low gain alarm ration 6.  This is with 23 watts 
input 160-10 meters.  Any advice?

Thanks, Ed W5TM

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Re: [Elecraft] KPA1500 LOW GAIN FAULT

[Eric Swartz - WA6HHQ, Elecraft]

Hi Ed,

Please email supp...@elecrat.com and they will dig into it immediately to help 
you resolve the problem.


If you can use the KPA1500 utility to download the 1500's config file and attach 
it to that email that will also be helpful.  (They can walk you through that 
procedure if needed.) that file includes both the amps full configuration and 
its detailed fault log.)


73,
Eric
/elecraft.com/

On 4/29/2019 7:35 PM, Ed gilliland wrote:
My KPA1500 is faulting with a low gain alarm ration 6.  This is with 23 watts 
input 160-10 meters.  Any advice?


Thanks, Ed W5TM

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Re: [Elecraft] K3 - DVR installation question

[Bob McGraw K4TAX]

I use AUDACITY which is a free software, record my own messages, set it 
to  play a loop and let it feed the radio.  It can be used for most all 
modes, SSB and CW. I have several pre-recorded messages which I can 
easily choose.   All that is needed is the free software, and a single 
USB cable between the computer and my K3S. Set the input to MIC + LIN 
and turn on the VOX.  A few level tweaks and one is off and running.


73

Bob, K4TAX


On 4/30/2019 9:17 AM, Dick Dievendorff wrote:

Bill: I use mine in DX pileups, as I tend to get enthusiastic and holler my 
call, which could become tedious to my wife. M1 has my call, M2 has “thanks, 
you’re also 59”.  CW memories for M1 and M2 have similar function.

I tend to use M1 less often and M2 sooner since the arrival of my KPA1500.

Good to meet you in Visalia!

73 de Dick, K6KR


On Apr 30, 2019, at 13:58, K8TE  wrote:

In addition to contesting, I use it to call friends for a pre-setup sked.
They often don't show-up on-time or can't make it.  I quit after five
minutes with no response.

During FD several years ago, I took over the 40m station after a nearby
lightning strike took out the primary K3.  The back-up had no DVR.  That was
the longest four hours of the event (not a contest)!

I have also used the DVR for Special Event Station operations when the rates
slow down.  I wouldn't be without a DVR in my K3's!



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Re: [Elecraft] K3 - DVR installation question

[Dick Dievendorff]

Bill: I use mine in DX pileups, as I tend to get enthusiastic and holler my 
call, which could become tedious to my wife. M1 has my call, M2 has “thanks, 
you’re also 59”.  CW memories for M1 and M2 have similar function.   

I tend to use M1 less often and M2 sooner since the arrival of my KPA1500.

Good to meet you in Visalia!

73 de Dick, K6KR

> On Apr 30, 2019, at 13:58, K8TE  wrote:
> 
> In addition to contesting, I use it to call friends for a pre-setup sked. 
> They often don't show-up on-time or can't make it.  I quit after five
> minutes with no response.
> 
> During FD several years ago, I took over the 40m station after a nearby
> lightning strike took out the primary K3.  The back-up had no DVR.  That was
> the longest four hours of the event (not a contest)!
> 
> I have also used the DVR for Special Event Station operations when the rates
> slow down.  I wouldn't be without a DVR in my K3's!
> 
> 
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Re: [Elecraft] K3 - DVR installation question

[K8TE]

In addition to contesting, I use it to call friends for a pre-setup sked. 
They often don't show-up on-time or can't make it.  I quit after five
minutes with no response.

During FD several years ago, I took over the 40m station after a nearby
lightning strike took out the primary K3.  The back-up had no DVR.  That was
the longest four hours of the event (not a contest)!

I have also used the DVR for Special Event Station operations when the rates
slow down.  I wouldn't be without a DVR in my K3's!

73, Bill, K8TE



--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] KPA1500 LOW GAIN FAULT

[Vic Rosenthal]

The first thing to do with any amplifier failure is to try it with a dummy 
load. If the problem still occurs, you can rule out SWR or RF feedback 
problems. It doesn’t seem like any of the above if it occurs on all bands, but 
it’s easy and a good start to a systematic diagnosis.

Victor 4X6GP 

> On 30 Apr 2019, at 5:35, Ed gilliland  wrote:
> 
> My KPA1500 is faulting with a low gain alarm ration 6.  This is with 23 watts 
> input 160-10 meters.  Any advice?
> 
> Thanks, Ed W5TM
> 
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