[Heathkit] HW/SB Filter info - Schematic added.

[Kenneth G. Gordon]

I have uploaded an updated HW/SB filter info PDF WITH an added 
schematic. It is still on the Glowbugs web site at:

http://www.mines.uidaho.edu/~glowbugs/

Click on 15) Modifications (etc) at the bottom of the main page. 

I will also include another PDF file soon of a fairly easy method of 
testing crystal filters for their characteristics. It will be near the same 
place on the web site.

Ken Gordon W7EKB