[Hammarlund] HQ-180A alignment

[Richard Knoppow]

    I don't have an HQ-180 so have to go by the handbook. Does not the 
receiver have two selectivity switches, one for full response and one 
for sideband selection? The selection switch should result in a 
non-symmetrical pass band displaced from the center in the direction of 
the selected sideband with exception of the 1Khz position which is 
centered. The other position should yield a symmetrical passband 
centered on the IF frequency. It sounds like you are getting the 
non-symmetrical response all the time.

On 12/18/2023 11:45 AM, Bob Young wrote:
> 
> The frequency shift I'm getting when switching the selectivity knob is becoming objectionable to me and after reading I'm going to redo the 60 KHz alignment. It's right on at the 1 KHz position which is the position the manual told me to align it with, but need to adjust the dial 2 KHz lower when switching to 3 KHz using the vernier control (widest on this receiver).
> 
> Bob
> kb1okl
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-- 
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998