monarch 614

Bakotube · 24th July 2012, 06:36 PM

I've got a Monarch 614 se. Any suggestions for upgrades?

Osvaldo de Banfield · 24th July 2012, 06:41 PM

The only suggestion I can do is o use a UL output, and too replace the first resistor in PS by an inductor.

planet10 · 24th July 2012, 06:43 PM

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.

Pictures?

dave

TheGimp · 24th July 2012, 06:43 PM

Increase the value of the (25uF) cathode bypass cap.

Bakotube · 24th July 2012, 08:48 PM

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.

24th July 2012, 06:41 PM	#2
Osvaldo de Banfield diyAudio Member 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. __________________ LW1DSE

24th July 2012, 06:43 PM	#3
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 5	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. Pictures? dave __________________ community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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24th July 2012, 06:43 PM	#4
TheGimp diyAudio Member Join Date: Aug 2009 Location: Johnson City, TN	Increase the value of the (25uF) cathode bypass cap.