[R-390] More C709 info

[n4buq at knology.net]

On Wed, 3 May 2006 00:10:17 -0400 (EDT), John Lawson <jpl15 at panix.com> 
wrote :

> 
> 
> 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

I've been wanting something to check capacitors for a long time, but just 
haven't found anything I'm willing to pay what the seller wants.  I've been 
outbid on a few, but just haven't found the "right" one yet.

Hopefully I'll get to go to our big hamfest this year (I've had to miss it 
the last two years!).  Maybe something will turn up there.  My 'scope is 
just about to the point of being nothing more than a "relative indicator".  
I need a much better 'scope too, but those get expensive in a hurry!

I'm going to get a 510pF 5% today and see what effect it has on the circuit.

Thanks,

Barry - N4BUQ