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Old 8th January 2017, 07:13 PM   #1
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Default Need a new output transformer, checkmate 50!

Hello all,
I am new to this forum, and am looking for some help.
I purchased a checkmate 50 amp a few years back, and stupidly ruined the output transformer...

anyways, im looking to replace it, and trying to figure out what to replace it with!

attached are pictures of my amp, and the schematic. any help would be great!

Thanks.

15943494_10208153739788572_918610534_o.jpg

15967060_10208153739148556_1581427349_o.jpg

15943058_10208153739188557_1546297973_o.jpg

teisco_checkmate_50.png
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Old 8th January 2017, 09:19 PM   #2
Ketje is offline Ketje  Belgium
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Depends where you live, transport is expensive (weight !).
In Europe you could try this one,
Ogonowski.eu - profesjonalne transformatry do wzmacniaczy lampowych
Mona
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Old 8th January 2017, 09:23 PM   #3
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I live in the us. Im wondering how i can select what to replace it with.
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Old 8th January 2017, 09:24 PM   #4
TheGimp is offline TheGimp  United States
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In the USA, I recommend Antique Electronic Supply. They carry a lot of guitar amplifier components.

https://www.tubesandmore.com/product...formers_chokes
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Old 9th January 2017, 01:36 AM   #5
PRR is offline PRR  United States
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"Fender 50 Watt" will be electrically functional.

The power end is a copy of the big Fenders.

Whether it has the original Japanese Sound, I do not know. It sure will look different.
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Old 9th January 2017, 01:48 AM   #6
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From that schematic, does it seem to you that its a 50 watt amp? People seem to think its 100 watts...
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Old 9th January 2017, 02:05 AM   #7
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Trust me. I have squeezed 100 watts through a pair of 6L6GC's. They don't like it, and won't live long. Your amp makes about 50 watts, as do most other amps with a pair of 6L6GC's.

You need a transformer rated for 50 watts, 6600 ohms, and a secondary to match you speaker cabinet, usually 8 ohms. A Bandmaster replacement OPT will work, as will several others.
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Old 9th January 2017, 02:09 AM   #8
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thanks so much. its all starting to make sense now... any suggestions for brands? Ive been looking at mojotone, clasic tone, and mercury magnet. My budget is pretty tight...
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Old 9th January 2017, 06:29 AM   #9
Enzo is offline Enzo  United States
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Then look at the prices on Mercury, I suspect you won't afford them. I agree, a classic 50 watt pair of 6L6 style amp - which many Fenders are. Also try at www.tubesandmore.com
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Old 10th January 2017, 09:42 PM   #10
PRR is offline PRR  United States
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Let them think it is 100W.

(The "50" in the model is the price??)

50 Watts. Maybe 35, maybe 56, and on today's high wall voltages you may test-out 60W at high THD. Not 100W anything like a Sine.

It is a Japanese version of Fender.

I believe the core is smaller than many 2-6L6 Fenders. I would not over-buy this iron. The generic 40W and 50W Fender Replacements won't be exact right, but won't be wrong, and are about the lowest-price OTs around this power zone. Tubelab may be right that a 6.6K Bandmaster is more the right spirit than the 4K jobs for the Dick Dale inspired monsters.
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