[NJARC] Re: Philco 70 Question Re: AC/DC & More

[John Ruccolo]

Hi Lisa,

There should be *no* B+ there, if this is the RF input
coupling coil. Or are we talking about something else?

Just my two cents,

JR

PS -- Marty, I really enjoyed your Philco 70 diary. It
was terrific!

--- radiomf at comcast.net wrote:

> Visit our web site - See http://www.njarc.org
> _______________________________________________
> 
> That was celluloid. It probably was used in the
> original manufacture and can be discarded. I would
> not use paper, but maybe some wide scotch tape. but
> that would be slippery and make winding more
> difficult.either leave it be, or remove it and not
> replace it.
> -------------- Original message -------------- 
> From: <oleradiogal at verizon.net> 
> 
> > Ok - coupling...resonant secondary - that all
> makes sense. Thanks! 
> > 
> > Yes, 64 turns looks about right - I stopped
> counting at 50!! So, that makes 
> > 20.1' of wire plus several inches for the leads.
> Lots of wire in such a tiny 
> > space. 
> > 
> > Here's my next challenge: The plastic insulating
> shield between the coils is 
> > yellowed and badly split (probably contributed to
> the open circuit). I want to 
> > cut a strip of heavy paper to replace it (plain
> notepad). How does paper stand 
> > up to 250V of B+ ? Should I be considering a
> different material? 
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