Just some notes for future folks reading this.
I always replace D1 and Q6 together.
Other notes re Q6 and D1;
1. Poor RX on 24 and 28Mhz 12m 10M only and TX gain is OK. Q6 a 2N7002,
OR D1 on the LPA can Suck the RX down on these two bands!!
2. Slow ramp up of TX power output. Typically worse on
Hi all,
just wanted to let you know that my K3 is back again with full output power.
We found the Diode D1 on the LPA board. On the anode side, it had shown full
power, on the other side, nothing. When unsoldering it, it was already very
loose. The diode itself was intact, but had no contact at
Chris;
Since you EE INIT-ed your radio, you MUST re-load a known-good saved
configuration!
Or setup all options, filters etc and do the transmit gain calibrations.
An EE INIT reset blanks the radio and sets it to ONE filter, (a 2.7,
with no offset, in slot 1).
Keith WE6R Elecraft K3/K4 Tech
_
Hello,
together with Harald DD0VS, we narrowed it down to the diode D1 on the LPA
board. I will now order the diode and some probably affected parts around the
diode and start replacing and testing again.
I will report again.
Many thanks to all others with giving different hints!
73s Chris DL
On 3/24/2021 9:28 PM, Christian Janssen DL1MGB wrote:
I don't have a spectrum analyzer, but I will look with my eyes if there is
something noticeable.
A frequency counter can also be a useful RF probe for your own TX
73, Jim K9YC
__
;>>
>>> DD0VS
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> Gesendet von Mail <https://go.microsoft.com/fwlink/?LinkId=550986> für
>>> Windows 10
>>>
>>>
>>>
>>> *Von: *Chr
t;
>>
>> Gesendet von Mail <https://go.microsoft.com/fwlink/?LinkId=550986> für
>> Windows 10
>>
>>
>>
>> *Von: *Christian Janssen DL1MGB <mailto:ch...@dl1mgb.com>
>> *Gesendet: *Mittwoch, 24. März 2021 21:05
>> *An: *elec
gt;
>
> *Von: *Christian Janssen DL1MGB <mailto:ch...@dl1mgb.com>
> *Gesendet: *Mittwoch, 24. März 2021 21:05
> *An: *elecraft@mailman.qth.net <mailto:elecraft@mailman.qth.net>
> *Betreff: *[Elecraft] K3 - no output power
>
>
>
> Hello,
>
>
>
&
ay, March 24, 2021 1:49 PM
> *To: *Harald Fritzsche (DD0VS) <mailto:harald.fritzs...@dd0vs.de>;
> elecraft@mailman.qth.net <mailto:elecraft@mailman.qth.net>
> *Subject: *Re: [Elecraft] K3 - no output power
>
>
>
> Hi Harald,
>
>
>
> spectrum analyzer
@mailman.qth.net
Subject: Re: [Elecraft] K3 - no output power
Hi Harald,
spectrum analyzer and more space on the table would be the best, but both not
available :-)
Additional information:
- internal voltage / current (DISP)
Standby: 13.8 V / 0.86 A
Tune: 13.4 V / 3.20 A
And still no power output on the
Does it receive?
Wes N7WS
On 3/24/2021 1:03 PM, Christian Janssen DL1MGB wrote:
Hello,
it happened during the Russian DX Contest last Saturday, from one second to
another. No output. When I tune the display looks like this:
http://dl1mgb.com/temp/k3_no_power.jpg
Following conditions:
- se
l1mgb.com>
> *Gesendet: *Mittwoch, 24. März 2021 21:05
> *An: *elecraft@mailman.qth.net <mailto:elecraft@mailman.qth.net>
> *Betreff: *[Elecraft] K3 - no output power
>
>
>
> Hello,
>
>
>
> it happened during the Russian DX Contest last Saturday, from one seco
Hello,
it happened during the Russian DX Contest last Saturday, from one second to
another. No output. When I tune the display looks like this:
http://dl1mgb.com/temp/k3_no_power.jpg
Following conditions:
- sending into a 50 ohm dummy load
- no matter how many watts are set with PWR knob
- Tes
Back in volume 117, issue 39 there was some chatter about having no output
power from a K3. Whatever became of that issue? I have seen nothing since.
I have a K3 that has no output power. If I key the rig while listening
with an external receiver, I can hear what I am keying on the frequency th
Some things to check...
- Check: Config TX INH needs to be set to "false"
- Be sure that you are not in the test mode (TX is blinking) -- Press and
Hold "Mode Up/test" to toggle
- Connect dummy load, and press & hold "XMIT/Tune" -- if this works, then
the hardware is probably OK.
- If in CW, P
My newly assembled K3 has no power output. I have tried all the
configuration "settings" that might affect output. I have checked all the
assembly procedures to assure I did all correctly. The 100 watt amp is not
yet installed. I am convinced I have a hardware problem. I have sent a
request for hel
I have not yet determined the exact series of events, but something strange
happens to both of my K3s. This weekend I have been participating in the
Texas QSO Party. As it is both a CW and SSB event and multi-band I am doing
jumps from band to band and mode to mode. Many times I get to the
desti
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