[Collins] preselector position

[Dr. Gerald N. Johnson]

Each band has its own set of trimmer capacitors generally increasing in 
capacity from 10 m down to 80 m. My handy 32S-1 manual shows that band D 
exciter tuning peaks at a reading of 5.8 for 18.1 MHz. Same for the 
75S-3B manual that shows 18.1 peaking at 6.05.

Because of the separate capacitors, Band D would peak at a setting of 
about 4 for 15 MHz with the dial pointer pointing to 40 meters.

Check out those tuning charts in the manuals.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association.

On 6/22/2011 6:02 PM, yash at aol.com wrote:
>
>   Using a 17 meter crystal in the 21.0 position,was wondering why the pre selector peaks at apx 6 on the scale. I would think it would peak around 7 to 8 position. the 75s-3/32s-3 combo work just fine on 17 meters while transceiving .Just curious why it peaks where it does.
> thanks'
> dale wt4t
>
>
>