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Old 6th March 2005, 04:09 PM   #1
n0plb is offline n0plb  United States
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Question Monarch SA-30 Schematic

I have a Monarch SA-30 tube amp that I am trying to rebuild. If I fire it up everything plays but volumne starts dropping quickly and two of the 6BM8 tubes, one in each channel start glowing like light bulbs. If I remove those two tubes the next in the series start glowing.
The tubes used in the amp are two 12ax7's, four 6bm8's and one 6ca4.
I have ordered new caps for it but would still kike to come up with a schematic for it.
If anyone has a idea of where to start looking for the problem at I sure would appreciate the help.
All tubes have checked good on a Sencore TC-142 and the filter capacitors checked weak on a EICO model 950 capacitor checker.

Thanks
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Old 18th March 2005, 07:28 AM   #2
n0plb is offline n0plb  United States
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Talking Found Schematic

I notice that 48 people looked at my request for a schematic for my Monarch SA-30 amp and would like to thank everyone for trying. I finally located a copy, got the amp recapped and am now listening to it.
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Old 31st March 2009, 02:30 AM   #3
imsky is offline imsky  Malaysia
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this is going to be my first tread in this forum after joining.
i need your help for my Monarch SA-40A tube amps.

it was previously own by my grandpa. i plan to rebulid the amps but there was nothing i can do without the schematic diagram.

i was happy that you can find the schematic diagram for your SA-30A. i ve been searching but can find it. i have been asking people who repair here in Malaysia but even the hardcore or the repair shops also say that they can do it.

hope you can help me....
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Old 31st March 2009, 03:35 PM   #4
imsky is offline imsky  Malaysia
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Default sorry, since i can't edit my previous post.

i was happy that you can find the schematic diagram for your SA-30A. i ve been searching but can find it. i have been asking people who repair here in Malaysia but even the hardcore or the repair shops also say that they can do it.

it was supposed to be like this...

i was happy that you can find the schematic diagram for your SA-30A. i ve been searching but can't find it. i have been asking people who repair here in Malaysia but even the hardcore or the repair shops also say that they can't do it.

sorry for the typo
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Old 25th May 2009, 04:07 AM   #5
imsky is offline imsky  Malaysia
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anybody can help me here????

PLEASE......
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Old 1st November 2009, 08:12 PM   #6
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Quote:
Originally Posted by n0plb View Post
I finally located a copy, got the amp recapped and am now listening to it.
Hi,

Would you mind to share the schematic?

Thanks

Fraser
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Old 21st March 2010, 01:29 PM   #7
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Hi,

Found a Monacor STA-300X and I'm not sure, but the schematic of your amp could be similar to the amp section of my receiver.

So, is it possible for you to share the schematic?

Thanks.

Patrice
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