[AMRadio] diode substitute for 866

[Rick]

I was of the same opinion, so, I disconnected the filament winding
completely and still have the arc. 

Rick

-----Original Message-----
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net] On Behalf Of Larry Szendrei
Sent: Wednesday, June 08, 2011 3:09 PM
To: Discussion of AM Radio in the Amateur Service
Subject: Re: [AMRadio] diode substitute for 866

On 6/8/2011 2:46 PM, Rick wrote:
> My question is, what is
> attached to pin 4 in the diode that it would arc to or from? My
> understanding is the anode is on the plate cap and pin 1 is the only one
> used in the socket. Why would it arc to pin 4?

Pin 4 is connected to pin 1 through the secondary of the 866 filament 
xfmr, so it has +HV on it as well as pin 1.

73,
-Larry/NE1S