[Collins] 75A4 Alignment

[Dr. Gerald N. Johnson]

On Mon, 2007-04-23 at 17:15 -0300, Jose Vicente wrote:
> PSE help,
> 
> 75A4 manual page 5-2
> 
> VARIABLE IF AND 160 METER BAND ALIGNMENT
> 
> Connect signal generator to antenna input
> through a 100 Ohm dummy antenna.
> 
> How is this dummy antenna made, is it a
> 100 Ohm resistor In series or parallel with
> the generator output.
> 
> Thanks, Jose
> 
So long as you are not testing for absolute sensitivity to 1% accuracy,
its probably not critical. I think I'd use a 50 ohm signal generator
with a 50 ohm series resistor to make a 100 ohm source. Though unless
I'm proven wrong, I'd simply use the crystal calibrator signal with
maybe a 100 ohm termination on the antenna connector if I found that
termination affected the alignment.
-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer