[Amps] Using door knob caps as padders/blockers

[Richard]

>Phil Clements wrote:
>> 
>> I do know that every SB-1000 I have tuned up on 160 meters
>> has the same drift problem. 
>
>My SB-1000 did, too.  Recently I thought I could get away with using a 
>Sprague
>1000 pf 6KV doorknob in my 160 meter antenna tuner.  This one is about 1" 
>dia,
>5/8" high (2.5cm x 1.5cm), significantly larger than the ones in the 
>SB-1000. At
>the 800 watt level (QRP for many in this audience), the SWR drifted up as I
>keyed the transmitter.  The doorknob was warm, but not what I would call 
>hot. 
>Replacing it with a big fat mica (I don't know the designation, but it's 
>about
>2" x 2" x 1" in size [5cm x 5cm x 2.5cm]) put an end to this behavior.
>
Amen, Vic.  Mica dielectric works well at 2MHz,

-  R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, 
www.vcnet.com/measures.  
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