On Sat, 24 Mar 2012 15:12:55 -0400, Edward Knobloch
wrote:

ND4jS wrote:
I am attempting to amplify a newly acquired multi elmac transmitter with
a henry 2kw. The power of the elmac is too high and i have tried
swamping it with a 50ohm dummy load in parallel with the amp. This
helped but the input is still a little too high. Any suggestions?

Hi,

Assuming the linear requires 80W input to produce 1500W,
you need 20W carrier input to the linear in AM mode.
I would replace the 6146 with a 2E26 (same base pin-outs)
and lower the screen voltage in the exciter
for 20W carrier output. Then, no need for an attenuator
and the exciter will run cool. Monitor the ALC output
voltage from the linear and adjust your modulation
for just below a trace of ALC on voice peaks.

The final tuning and loading adjustment of the linear
should be at full modulated input, not with just the 20W
carrier and no modulation, or the linear will not
be set up for full output. If you don't have an audio
oscillator to drive the Elmac, you might want to use
an 80W CW input level from another exciter,
and note the tune and load settings of the linear
for max output. Then keep those settings with the Elmac
exciter as input to the linear.

73,
Ed Knobloch

Ummm why not just lower the screen voltage on the existing 6146 ?

peter