[R-390] More Filter Options

[Perry Sandeen]

List,

It appears from Cuck Felton’s ad in ER that he has obtained crystal filters as well as new meters for the R -390A’s that he re-mans.  I don’t any details. 

On page 113 of Chapter 9 of the R2KR3 there is an article by Dallas Lankford on how to install a 6 KHz Collins low cost filter in the R-390A IF strip.  It includes the details for winding the matching torrid coils that are needed.

If the Collins filter is too much for your wallet $$$ of Nebraska has ceramic filters in the $16 range but one would still have to have matching torrid’s.  I don’t know if the values Dallas used for the Collins filter would apply. 

Shameless Plug:  Many questions asked on the reflector list have been answered in the Y2KR3 chapters 9 thru 13.  Roger’s tutorials can take ANYONE with the willingness, who has basic mechanical skills, a minimal amount of test equipment and patience through all the steps to have a first rate “A”.

There are a plethora of other articles for making your  “A” better than when it came new from the factory.  Best of all it’s a free download.

Regards,

Perrier