[Boatanchors] HQ-180 Alignment Issues

[MICHAEL TALLENT]

Did you set the IF bandwidth and the sideband selector switch according to 
the manual.  You cannot adjust the 60 Khz properly without the correct 
settings.  I would have to look them up to tell you, but the HQ-180 manual 
should list them.  The HQ-170 manual does not give the correct 60 KHz 
alignment instructions. BTDT

Mike W6MXV

-----Original Message----- 
From: Ron.K3PID
Sent: Monday, January 01, 2018 7:30 PM
To: Boatanchors at mailman.qth.net
Subject: [Boatanchors] HQ-180 Alignment Issues

Perhaps the members of this august group can offer some advice. I have been 
working on an HQ-180 ( non A ) that at some point in the past had been 
“adjusted” and “rewired” leaving somewhat of a mess. I have it working (?) 
and have been trying to go through the alignment. I started of course with 
the 60 KHz IF section thru the demodulator as prescribed in the manual 
injecting an unmodulated 60 KHz sine wave at the junction of T5 & C28 and 
measuring the negative DC voltage at the junction of L8 and C44. I proceeded 
to peak T5 thru T11 with apparent success however I note that the manual 
alerts me to the need to reduce the input signal to keep the reading at or 
below –5 VDC. It never gets above –4 VDC with a 25 V P-P sine wave input. Is 
that a simple matter of insufficient drive voltage? If 25 V P-P isn’t enough 
what is the recommended value? NOW moving on to the 3035 KHz alignment, I 
injected an unmodulated 3035.00 KHz signal at the grid of V2 ( pin 7 ) and 
tried to peak L4 and T5 thru T1 as prescribed BUT I can not get a peak! in 
all of the cans the maximum reading occurs with the adjustment all the way 
bottomed out (max inductance). My first thought was that the frequency is 
not centered but as far as I can tell all of the frequencies are spot on.

Any suggestions will be appreciated as usual...

Ron K3PID

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