Topband: SB-1000

[Herbert Schoenbohm]

If you can't find the exact value of 170pf  the ceramic 5KV door knobs 
at 200pf will work.  Better yet even a couple of 500pf door knobs in 
series will give you 250 pf which will just mean a little less on your 
variable will tune.  Another common ceramic door knob value is 500pf and 
three in series will put you in the ball park. Also RKR Designs 
(formerly Alpha of RF Concepts) has a little "blue" 170 pf at 15KV that 
is off the shelf and is the exact value.  R.L. Drake used a double sided 
copper clad board to make 160 tuning capacitors for their L7 and also 
for their ATU.  This could be an easy DIY project  and I have seen this 
method instructions posted on the web somewhere.


Herb Schoenbohm, KV4FZ

On 12/21/2015 8:34 AM, Don Lynch wrote:
> One missing connection is 10M mod. 160M Padding cap (170pf,
> >7500V doorknob) is shot.