"cliff wright" wrote in message
...
Good day all!
Have replaced the finals with 12 volt 6146B's (putting the heaters in
parallel of course). However although it now works, its effeciency is
damned awful.

That should work fine.

When it is loaded up to give 60 watts RF into a dummy load
the dissappation in 6146 anodes makes then glow cherry red!!!

Does maximum power out perfectly coincide with the dip in plate
current? What is the quiescient plate idle current in SSB? What
is the grid drive current when tuning? Are you using a terminating
type dummy load wattmeter, or an inline wattmeter to an antenna?

What is the plate current when tuned for 60 watts output?

Yes, I have replaced the anode coupling cap (with an appropriate 3Kv rf
type)

That wouldn't be a likely cause.,,

checked all the tube voltages set up the neutralisation and tried
the rig on all bands to ensure that the padding caps are OK.

Double check you coax jumper cables for problems, unsoldered
shields, etc. Sometimes simple solutions to difficult problems
elude us.

Peter k1zjh