[Elecraft] 15 meters high vco voltage

[W3FPR - Don Wilhelm]

Roland,

Bands from 14 mHz and up typically have plenty of excess range - you
certainly have something wrong.

If things seem to change on you, you can be certain you have a bad solder
connection somewhare in the VCO area.

Concentrate on C73 - that is the only capacitor added for 15 meters, and
relay K13 which controls whether it is in or out of the circuit.

While you are checking things, take a look at D23 through D26 - they should
be MV209 type - that is the larger of the 2 varactor types and if you look
down on the top of them they will look like a full semicircle - the 1SV149
type is the smaller body and looks like a flattened semicircle when viewed
from the top.  If the varactors are not correct, the fixed capacitors will
not provide the proper tuning range.

73,
Don W3FPR

> -----Original Message-----
>
> I was doing the VCO voltage readings.  I got one voltage out of
> range and it won't tune down with L30.  On 15 meters it reads
> 8.49 at 25000.  It goes out of range at 22.159.
> I checked C71-C74 and D21-D26.  Manual said  to also check C70
> through C74.
> Is there a C70?  Thanks.
> Roland in Stockton
>
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