HW-101 help needed

[Ed Richards]

John;
Some thoughts:

On Wed, 7 Apr 1999 20:15:16 -0600 "Clark, John" <john.clark at STATE.CO.US>
writes:
>I have worked thru
>the Alignment procedures and am left with a couple of
>problems.
>
>
>
>
>1.
>I can't get the Crystal Calibrator down to 100 kHz, only 104.  Is
>there
>a
>mod for this problem?
>
>ER: Some trimmer capacitors loose capacity over time due to the silver
plating oxidizing away. Try a new trimmer capacitor. If no help, try a
larger trimmer capacitor as the crystal may have aged.
>
>
>2.
>Going to the end of the Receiver Alignment procedure, it states that I
>should
>see
>
>S9 + 20 dB at 3700
>KHz with the calibrator.  I can only get S4.  The receiver works as
>well as my TenTec RX320.
>
>The crystal calibrator may have low output, espically since you are
having trouble with it ; or, the receiver may have lost some gain due to
aging or component tolerences. Most "S" meters are more relative reading
than absolute. Find a good signal just above the noise and adjust it to
read S-9.
>
>
>Where should I start
>to bring this meter reading up?
>
>ER: See above.
>
>
>3.
>Also, at the start of the procedure I adjusted the "Bias" CCW but I
>don't see
>anywhere in the alignment to adjust it for.... ?
>
>ER: I dont have a manual for your model, but the bias sets the point on
th Eg/Ip curve hat the tube(s) operate at. i.e. the class of operation:
A, AB, B, C,etc. It should tell you somewhere. If not, set it for the
recommended plate current at idle.
>
>ER: Best regards,
Ed Richards
>
>
>
>All ideas and help
>will be appreciated.
>
>
>
>
>73
>
>
>
>John
>
>
>N0URE
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