On Tue, 25 Mar 2008 23:40:39 -0400, afcsman
wrote:

Chuck James wrote:
I'm a VERY new Ham, so please bear with me. The instructions for the
Kenwood TS-820 say to tune the radio for a dip in the meter, as partially
described from the manual below.

PLATE TUNING
Turn the METER switch back to IP, leave the MODE switch at TUN and flip the
stand-by switch to SEND Quickly adjust the PLATE control to dip the plate
current (a minimum meter reading) Return the stand-by switch to REC
NOTE: The TUNE position permits tuning of the final tank circuit at reduced
power without danger to the tubes. With the MODE switch to the TUNE
position, the screen voltage of the finals is reduced to approximately 50%
and the keying circuit is shorted.

The problem is, that once I have completed all of the previous (not listed)
steps, and finally try to adjust the Plate control for a dip in the meter,
the meter completely pegs to the left when I flip the stand-by switch to
SEND. I have installed new final tubes, and can still tune the rig so the
power shows to be putting out 100 watts. I can make contacts with this rig,
but I'm worried about not being able to properly dip the plate current.
Has anyone else had this problem, or can anyone point me to the "cure"?
Thanks in advance!

73's
KE5GEO


No Guar-un-teeze, but you might get
additional advice from the fellows in
the Yahoo Interest group concerned with
this rig. I don't mean to cast
aspersions on the worthy inhabitants of
the newsgroup, but a "seeker of truth"
should use all avenues...
http://groups.yahoo.com/group/TS-520_820_530_830/

I once had this problem with an old SB 401 xmitter. It turned out to
be the meter shunt resistors in the final amplifier tube cathode were
burned to near zero resistance. This caused zero indicated plate
current but a normally functioning xmitter otherwise. The plate
current was actually normal but the shorted resistors produced no
voltage for the plate meter.

Glenn