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Re: New KX1 low power and 20m oscillation

Posted by Geoffrey Mackenzie-Kennedy-3 on May 09, 2012; 12:36am
URL: http://elecraft.85.s1.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133p7541196.html

But that requires the use of solder :-)

73,
Geoff
LX2AO


On May 09, 2012 at 02:02 +0200, Don Wilhelm wrote:


> Actually, there is an easier test - just put a temporary jumper between
> the connector and emitter of Q7.  Do not expect it to receive with that
> jumper in place, but observe what happens to the sidebands when you
> transmit.  If it cleans things up with the jumper in place, replace Q7
> and make certain R28 is well soldered.
>
> Stan reported a negative voltage on the base of Q7 - I trust that was
> while transmitting, and if that assumption is true, I suspect R28 has a
> problem.  One end of R28 should be near 6 volts when transmitting and
> the other end should be near 0.6 volts.
>
> 73,
> Don W3FPR

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