[AMRadio] mercury vapor tubes

[Rick]

Thanks, Jim. I have had little experience with diode substitutes. I always
heard they changed the voltages considerably. Thanks for the good news!
Rick 

-----Original Message-----
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net] On Behalf Of JAMES HANLON
Sent: Wednesday, June 08, 2011 12:02 PM
To: rickb at tx.rr.com
Cc: AMradio
Subject: Re: [AMRadio] mercury vapor tubes

Rick,

If your "diode substitutes" throw the voltages all off, something is wrong.
The forward drop across an 866 is only about 11 volts.  The drop across a
single silicon diode is about 0.7 volts.  Several in series would have
correspondingly more drop.  But the drop across a silicon diode substitute
should not be that different from the drop across an 866, and if it does
throw the voltages off then something else is going on.

Jim, W8KGI