Trouble with K2

[Luc Favre]

Godd evvening,
My K2 suddently got mute. I suspect it get a too large RF signal from my
other transmitter, but when ?
Now in Rx mode, no signal comes in. A signal generator in the 7 Mhz band can
be geard but not moved with the main knob. The frequency display changes
from band to band varies with the main knob.
For I suspected a SW trouble I reinitialized the K2 (4-5-6). OK. I then
proceeded to a call pll on 40 with the probe lead in TP1 : info 232.

Any idea ?
Thank for your help + 73
Luc/F6HJO/HB9ABB

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[Masleid, Michael A.-2]

Hello Luc

As a quick test, don't adjust C22 or L30, just verify the tests on page
60 and 61 of manual F still give reasonable values:

Do the PLL Reference Oscillator Range Test to make sure the PLL still works.

Do the VCO Test to make sure the VCO still works.

If both of those are working, make sure that the Table 6-1 VCO Voltage Readings
haven't changed much.  A poor solder joint in the Phase Lock Circuits might be
the problem.

The K2 is pretty tough, it isn't likely to get killed by a near by transmitter.

Michael
AB9GV
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[Don Wilhelm-3]

Luc,

The steps in Appendix F (Troubleshooting) of the manual that are listed
under 'Receiver Signal Tracing' should identify the failing stage - once you
have identified that, we can help further should you not be able to locate
the failing component.

Initially, it would seem that your VCO is not properly  oscillating from you
initial comments - the VCO is one of the initial checks in the Receiver
Signal Tracing section.

73,
Don W3FPR

> -----Original Message-----

> Godd evvening,
> My K2 suddently got mute. I suspect it get a too large RF signal from my
> other transmitter, but when ?
> Now in Rx mode, no signal comes in. A signal generator in the 7
> Mhz band can
> be geard but not moved with the main knob. The frequency display changes
> from band to band varies with the main knob.
> For I suspected a SW trouble I reinitialized the K2 (4-5-6). OK. I then
> proceeded to a call pll on 40 with the probe lead in TP1 : info 232.
>
> Any idea ?
> Thank for your help + 73
> Luc/F6HJO/HB9ABB
>
>

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com