[R-390] Roofing Filters

[Perry Sandeen via R-390]

GM List,
 
I have thought for a long time of adding roofing
filters to my R390A*s as done by Dallas Lankford in the Y2KR3 manual.
 
Unless one buys five or more the price is about
+$200 ea IIRC.
 
I’m considering doing a group buy if enough people
are interested AND are willing to put the money up front.  I would need to charge about $15 more to the bulk
filter price so I’d break even.
This is serious money and effort as one needs to
wind torroid transformers for input and output impedance matching.
 
Look at the article in the Y2KR3 manual and think if
the remuneration will exceed the aggravation.
 
Please reply off list.  Expected time for the purchase would be mid
to late September at the earliest.
 
Regards,
 
Perrier