Monarch STA-100X Refurb

wrenchone · 31st August 2009, 02:19 AM

I recently grabbed on to a Monarch STA-100X AM-FM stereo receiver. It's a fairly simple, low end mid-60's metal box using a 6AQ8 and 2 X 6BQ5 single ended outputs. You know how a lot of Fleabay adds talk about their items being used in a non-smoking environment? Not this one... After a session with Mr. Simple Green and a brush and soft cloth, the thing will shed its nicotine haze and look fairly decent.The top needs to be wire brushed and repainted, as it's a bit scratched up.

Obvious other measures are a re-cap, as the electrolytics are older than a lot of the members of this forum. Anyway, does anyone have a lead as to where I could look for a manual? I want to cast a beady eye on the phono amp, the tone controls, and the power amp, as I can likely do a few things to improve them. An RH-84 type output amp comes to mind, for example. I suspect the same people made this as made my Lafayette amplifier, as the components and construction look similar.

I'll probably set this one aside for awhile after I clean it up, as I have a host of projects ahead of it. However, I want to be thinking about what I can do for it. Schematics?

planet10 · 31st August 2009, 04:11 AM

Calrad . i believe was also by the same maker.

If it is SE it can't be all that hard to trace the circuit.

dave

wrenchone · 31st August 2009, 04:20 AM

I'm not worried so much about the power amp as to the rest of the receiver. I haven't opened the bottom cover, but I'm expecting the usual point-to point hodgepodge. There is one PCB, I think devoted to the FM demux.

wopontour · 17th September 2009, 02:37 AM

Did you find a schematic or alignment data by chance?
I found one of these this summer at a yard sale as well
WOT

wrenchone · 17th September 2009, 07:12 PM

There is an entity in Manila that purports to stock a soft copy of the manual, but I don't trust them enough to give them my CC number. If they took Paypal, I'd go for it.

wopontour · 18th September 2009, 04:23 PM

Quote:

Originally Posted by wrenchone

There is an entity in Manila that purports to stock a soft copy of the manual, but I don't trust them enough to give them my CC number. If they took Paypal, I'd go for it.

I hear ya. Maybe one of the download services have a copy. Plus I'll try Tom Bavis over at AK to see if there was ever a SM printed by SAMS. I'll find you if I find one and vice-versa??
Thanks
WOT

wrenchone · 18th September 2009, 05:21 PM

Sams was the first place I looked - no joy so far.

kevinkr · 19th September 2009, 06:33 PM

You can try Tom Bavis here too...

31st August 2009, 02:19 AM	#1
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	Monarch STA-100X Refurb I recently grabbed on to a Monarch STA-100X AM-FM stereo receiver. It's a fairly simple, low end mid-60's metal box using a 6AQ8 and 2 X 6BQ5 single ended outputs. You know how a lot of Fleabay adds talk about their items being used in a non-smoking environment? Not this one... After a session with Mr. Simple Green and a brush and soft cloth, the thing will shed its nicotine haze and look fairly decent.The top needs to be wire brushed and repainted, as it's a bit scratched up. Obvious other measures are a re-cap, as the electrolytics are older than a lot of the members of this forum. Anyway, does anyone have a lead as to where I could look for a manual? I want to cast a beady eye on the phono amp, the tone controls, and the power amp, as I can likely do a few things to improve them. An RH-84 type output amp comes to mind, for example. I suspect the same people made this as made my Lafayette amplifier, as the components and construction look similar. I'll probably set this one aside for awhile after I clean it up, as I have a host of projects ahead of it. However, I want to be thinking about what I can do for it. Schematics?

31st August 2009, 04:11 AM	#2
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Calrad . i believe was also by the same maker. If it is SE it can't be all that hard to trace the circuit. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

19th September 2009, 06:33 PM	#8
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	You can try Tom Bavis here too... __________________ www.kta-hifi.net

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31st August 2009, 04:20 AM	#3
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	I'm not worried so much about the power amp as to the rest of the receiver. I haven't opened the bottom cover, but I'm expecting the usual point-to point hodgepodge. There is one PCB, I think devoted to the FM demux.

17th September 2009, 02:37 AM	#4
wopontour diyAudio Member Join Date: Jun 2003 Location: .CA	Did you find a schematic or alignment data by chance? I found one of these this summer at a yard sale as well WOT

17th September 2009, 07:12 PM	#5
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	There is an entity in Manila that purports to stock a soft copy of the manual, but I don't trust them enough to give them my CC number. If they took Paypal, I'd go for it.

18th September 2009, 05:21 PM	#7
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	Sams was the first place I looked - no joy so far.

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