Re: Topband: RE: Butternut HF2V Configuration

["George & Marijke Guerin" <gmguerin@voyager.net>]

Javier, Osten, etc.

Reference the Capacitor that heats up, it is due to high current in the 
configuration.

If possible, find three or four smaller value door knob capacitors and put 
them in parallel to make the same value as the original Butternut capacitor, 
then the over heating may go away and one may be able to operate without 
taking a break and may be able to push a KW instead of 600 watts.  Heavy 
duty disc ceramics may also work.. that is what Array Solutions does for 
some of their phasing units... about 6 or 8 small values in parallel to get 
the capacity wanted.  In this case it might be across a ceramic insulator to 
replace the door knob.

For example the Collins 180U L-network antenna tunner uses 5 x 100 pfd in 
parallel instead of one 500 pfd capacitor to pad the air variable in the 
tuning unit for lower frequencies and low impedances.

Good luck,

George    K8GG


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