[R-390] Staggertuned IF Question

[Roy Morgan]

At 11:46 AM 9/14/2006, Cecil Acuff wrote:
>... As I remember there is a capacitor involved on each can that sets the 
>Q for the coil...I can't remember if the cap needs to be there when you 
>are to stagger tune or vice versa....


I seem to remember that the R-390A has resistors in each can that are the 
"Q spoilers".  A capacitor is normally of such low loss that it will not 
affect the Q by much.

One (BAD) modification was to cut out the resistors in the -A IF cans to 
get extra gain.. your receiver got real "HOT".  Trouble is, the IF bandpass 
went to hell, and there was too much gain. NOT a good modification.


Roy


- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing
13033 Downey Mill Road, Lovettsville, VA 20180
Phone 540-822-5911   Cell 301-928-7794
Work: Voice: 301-975-3254,  Fax: 301-975-6097
roy.morgan at nist.gov --