FW: HW-101 step 4

[WB2TBB]

It is the output of an oscillator that is going to beat and mix with another
signal. Too much and it will swamp the other signal. Too little and it will
be
swamped by the other signal.
I suggest you do as the book suggests.
...Dave
-----Original Message-----
From: Clark, John <john.clark at STATE.CO.US>
To: HEATH at LISTSERV.TEMPE.GOV <HEATH at LISTSERV.TEMPE.GOV>
Date: Monday, May 10, 1999 10:23 PM
Subject: FW: HW-101 step 4


>Second call.
>
>No replies?
>
>
>
>
>Receiver Alignment heterodyne oscillator.
>Page 120
>
>Other than "because the book said so", why am I setting
>these heterodyne values on "TP" to a "DC" level of
>" -.5 to -2" ?
>
>I set all of mine to -1.5 to start.
>
>Looking at the schematic I could see that I should be able
>to see the fixed LO values for each band to the values on chart
>page 162 Figure 2-2.
>
>Imagine my disappointment when I found that not one of my settings
>resulted
>in an "ON point" setting.
>The first three were close, but I was not able to adjust them exact on.
>The rest were way off.
>I re-did the procedure going for correct frequency,  Not the DC
>voltages that now are way off ?
>I have my frequency counter over at the Denver shop to build a
>correction
>chart.  I don't want to off again.
>
>Can anyone explained what I'm seeing here?
>
>Do I add small ( 100pf )cap to the crystals to bring them up?
>
>What is the relationship between the -.5 to -2 vdc setting and the
>peeking of the coils to the crystal frequencies?
>
>Any reason why the -1.5 vdc setting did not result in a good frequency?
>
>
>
>Later
>73
>John
>N0URE
>
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