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Old 24th July 2012, 06:36 PM   #1
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Default monarch 614

I've got a Monarch 614 se. Any suggestions for upgrades?
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Old 24th July 2012, 06:41 PM   #2
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Join Date: Dec 2011
Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina
The only suggestion I can do is o use a UL output, and too replace the first resistor in PS by an inductor.
Osvaldo F. Zappacosta. Electronic Engineer UTN FRA from 2001.
Argentine Ham Radio LW1DSE since 1987.
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Old 24th July 2012, 06:43 PM   #3
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All the caps likely need replacing,

I'd add a power supply choke and convert it to an RH84.

If anything like the ECL82 versions i have, it will have very nice iron.


community sites,, ........ commercial site planet10-HiFi
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Old 24th July 2012, 06:43 PM   #4
TheGimp is offline TheGimp  United States
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Increase the value of the (25uF) cathode bypass cap.
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Old 24th July 2012, 08:48 PM   #5
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Default monarch 614

Found this amp a few years ago in an antique store. Hardly any use.
Trying larger coupling caps(.22), not sure if they make any difference.
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