[R-390] More C709 info

[John Lawson]

On Tue, 2 May 2006, Barry wrote:

> doubles in amplitude.  Is this expected behavior or is the capacitor most
> likely leaky?


  One of my very-frequently-used bench instruments is a little (old:50s) 
Cornell Dubilier capacitor bridge - with a tuning eye indicator.  Checks 
from a few 10s of pF to about 100 mF - you know the general type.

  It was on the "FREE" pile at a swapmeet some years back, and it cried out 
to me, so I rescued it.  I have several much newer, more 'sophisticated' 
devices to do this - but for vintage tube gear - the little CD bridge does 
an easy, perfect job every time - and puts enough voltage accross a cap to 
"wake it up"...  ;}

   So my oblique answer to your Question above is: "Ellifino, whyncha 
checkit an see?" And to do that - there are a lot of older, cheaper 
capacitance bridges and meters out there - I get so much use out of mine 
it's amazing. Can't bitch over the 'price', either...


Just another 200 millidollar for a Tuesday evening...


Cheers

John  KB6SCO