[Amps] Doorknob quality

[Mike McCarthy, W1NR]

Take a look at http://www.qsl.net/i0jx/capacit.html for some advice.
Too bad I just sold a 500pf type 859 at a flea market recently...
I would try and find a surplus vacuum capacitor and a vacuum relay to 
switch it in as I did for 160M in my 4-1000 amp.

Mike, W1NR

Evert Bakker (PA2KW) wrote:
> Hello Jim en Colin,
>
> Thanks for info.
>
> It will be an extra capacitor switched in parallel with the variable plate
> capacitor (so within the tuning circuit)
> I "cooked" already two of these (different) doorknobs in just a few minutes.
>
>
> I guess Colin is right, it must be the high currents.
>
> I have no idea what the currents are, and often they are not stated on the
> websites which makes selecting the proper device difficult.
>
> I looked at
> http://www.surplussales.com/capacitors/Trans_Coup_Caps/cap_trans.html
> And saw the TDK and Murata capacitors are labeled as high current.
>
> Any suggestion before making an "investment"?
>
> 73's, Evert PA2KW  
>
>