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[AMPS] 572b's as a robust oscillator

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Subject: [AMPS] 572b's as a robust oscillator
From: W8JI@contesting.com (Tom Rauch)
Date: Sat, 24 Jul 1999 12:35:31 -0400
> >I need the approximate input impedance for a pair of 572-B's??  I am
> >working on the input matching on an SB-200 to six meters.  Abt 60ohms??
> 
> Not sure, Can not find any data here on the 572-b in regards to this. I'm
> sure it's writen down some where, I just haven't found the hiding place...
> 
> But I can tell you that 8000pf and it shunted by a .1µh inductor then
> placed across the input to ground works on 160m. 

Not a chance it will be the same on 50 MHz, the stray 
capacitances and lead inductances will change it greatly.


73, Tom W8JI
w8ji@contesting.com

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