"Pat Richardson" wrote in message
...
Hi,

I'm restoring a Heathkit SB-400 transmitter, and need some info on how
to realign the LMO (Linear Master Oscillator). Currently, it is
running about 75 KHz high at the lower end of it's range (i.e., on the
40M band, it will not tune below 7.075 MHz), and is out of linearity
by 16 KHz at the top of its range.

There is an adjustment on the LMO sealed with red paint - adjusting
this brings the frequency range down to where it should be (not sure
if this causes any other problems, though - it was sealed for a
reason??), but the linearity problem remains.

Does anyone have any suggestions or literature on this unit? (the LMO
is Heath Part No. 110-32)


Pat -

First go to K4XL BAMA web site and download the tutorial for Heathkit LMO
Repair by Ed Kotkiewicz
ftp://bama.sbc.edu/downloads/heath/lmo/

You will need the DjVu reader -- if you do not already have it
http://bama.sbc.edu/viewers.htm

I may want to try the HeathKit reflector of owners and former engineers.

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
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Archives - http://interactive.tempe.gov/archives/HEATH.html

Greg
w9gb