[Johnson] 866A vs 1N26737

[Paul, N6EV]

I have done this swap in my Valiant too.  Works fine.  The only thing 
I would amplify from what others have said is the removal of the 
filament wires must be done to protect the LV transformer.  Here is a 
snippet from Rodger, WQ9E which is contained in the 
"valiantnotes.txt" file that circulated a while back:

"One of the saddest transformer failures I have seen was the low 
voltage unit in a Valiant that I fixed for a friend many years 
ago.  The early production Valiants were built with standard hookup 
wire from the low voltage transformer (which supplies the 866A 
heaters) to the 866A sockets; of course this wire also has the DC 
plate voltage imposed upon it.  Arcing and shorting to ground is 
common, particularly as this wire ages and the result is a dead LV 
transformer. This particular unit had solid state rectifiers 
installed in the HV section but the owner left the heater wiring 
intact; unfortunately Murphy did not leave the insulation or the LV 
transformer intact."

73
Paul  N6EV
http://www.N6EV.com/