"Albert & Btittany Spear" wrote in message
...

"Gary Schafer" wrote in message
...
A check for proper neutralization can be done with full drive and the
final tuned properly. Watch the power output and the plate current as
you change the final plate tuning capacitor. Minimum plate current
should occur at exactly the point of maximum output. If it does not
the neutralization is off.

If you can observe grid current, the grid current should peak at
exactly plate current dip also.

You can rotate the neutralization cap slightly and try the above
again. It will get worse with one direction of rotation of the plate
tune with a particular direction of rotation of the neutralization
cap. A little diddling and you will be able to determine which way to
go.

73
Gary K4FMX


I have never heard of a neutralization procedure like this you mention.

I have always done a neutralization WITHOUT excitation.

Is this procedure you describe from an owners manual for a commercial
rig?



Gary is correct. Those procedures go back as far as I remember,
and are not necessarily found in owners manuals.

From a safety standpoint, the manufacturer would rather have the
B+ removed for adjustments. But,
if the neutralization is set correctly, the maximum output and minimum
plate current should coincide.

Pete k1zjh

Behold, Uncle Peter scribed on tube chassis:

snip

From a safety standpoint, the manufacturer would rather have the B+
removed for adjustments.

Also pull g2, lest you cook your screens.

--
Gregg "t3h g33k"
http://geek.scorpiorising.ca
*Ratings are for transistors, tubes have guidelines*