[Elecraft] K2 BFO Test fails

Don Wilhelm w3fpr at embarqmail.com
Sun Dec 5 08:40:41 EST 2010


  Benny,

R116 is supposed to be a very high value resistor - in fact, it would be 
best if it were actually an insulator, but 5.1 megohms is sufficiently 
high to serve that purpose.  The only reason the resistor is provided is 
that it produces both a mounting anchor for L33 and its leads provide a 
place to solder the fine wires.

It sounds like you have a bad L33 or one end that is not actually 
soldered.  Make certain the tinned part of the very fine wire is 
actually soldered to the lead of R116.
If it is well soldered, request a replacement L33 from 
parts(at)elecraft(dot)com.

73,
Don W3FPR

On 12/4/2010 8:03 PM, kruegerbenny wrote:
> Hi,
>
> grounding of L33 doesn't bring the expected signal (7.xMHz). D37 seems to be
> mounted the right way (round caps in direction to front panel).
> If I put a resistor parallel to R116(it should be the right one:
> grn-brw-grn-(gold)), i get the 4.9MHz oscillation, but still no signal at
> TP2 (in this case, i get the following frequencies by contacting the int.
> probe to U11-P7: 4918.75 and 4916.12).
>
>


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