[AMRadio] 4D32 rig testing

[K9MUF at aol.com]

In a message dated 1/23/4 9:59:58 AM, brett.gazdzinski at mci.com writes:

<< Collins runs them at over 700 volts in class C plate
modulated service (32V series).
If they don't arc over, and you don't exceed the plate dissipation,
what would be the problem?
 >>
Brett,

I have a 32V-3. I can't find anywhere in the manual where they specifically 
say wherher to use 600 or 700 volts except to use 600 volts for initial 
adjustments.
They do say in the description of the HV supply "The tube manufacturer 
recommends no more than 600 plate volts for phone operation, but this is for CCS 
rating". So without saying it I guess they are implying that 700 volts is 
allright for amateur use. 
The 4D32 is probably pretty conservatively rated. I have been running mine at 
600 volts, but perhaps now I will try the 700 volt position. Still, I would 
not run the 4D32 at over 700 volts.

Don