Re: A question about vacuum tubes

["A. Joseph Ross" <lawyer@attorneyross.com>]

On 2 Sep 2002 at 16:02, SteveOrdinetz wrote:

> Dan Strassberg wrote:
> >A 50C5 should be safe in a socket meant for a 35C5 and should not damage
> >the radio, _provided_ that the tube filaments are not in series. Many
> >radios of that day had the filaments in series and the series string was
> >connected directly across the 115V rms ac line.
> 
> 
> Pretty safe bet that the filaments are in series in this radio.  Most
> radios with a power transformer had 6 V or 12 V filaments (1st digit in
> tube would be a 6 or 12).  I've never seen a radio with 35 or 50 V
> filaments where it was off a transformer.  My guess is that this radio is
> a 6 tube model...the 50C5s tended to be in 5 tube units (All-American 5).

This is a 7-tube radio, and there's no transformer.  It's essentially an 
AM-FM version of an All-American 5.  I don't notice any difference in the 
way the radio sounds, except that the problems from the defective tube 
are gone.

-- 
A. Joseph Ross, J.D.                           617.367.0468
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