More info about about my Dual Rectifier

[zerot0lerance]

I need some more information about my Dual Rectifier.

Outside pictures:
http://imageshack.us/a/img209/1660/2r37.jpg
http://imageshack.us/a/img34/1025/gx25.jpg
http://imageshack.us/a/img23/6822/fp7c.jpg
http://imageshack.us/a/img17/9320/fmpk.jpg
http://imageshack.us/a/img585/8783/1qs4.jpg

Transformers:
http://imageshack.us/a/img703/6746/ppfp.jpg
http://imageshack.us/a/img802/1839/4m0n.jpg
http://imageshack.us/a/img834/9759/fdo6.jpg

...and photos of the inside:
http://imageshack.us/a/img853/9947/tkc9.jpg
http://imageshack.us/a/img96/6540/wp68.jpg
http://imageshack.us/a/img198/2664/h92p.jpg

So far I know it's a Rev F, it's written on the board inside. It's probably from the 1992. It's obviously 230V :mrgreen: I managed to find that these transformers (coded EIA 606) are Schumacher transformers, is this true? Checked it on these sites:

Antique Speaker Repair and Recone Services from The Speaker Shop
Vintage Guitars Info - dating vintage guitars, amps by date source code
EIA Codes
Commonly Seen EIA Codes
Transformer EIA codes

Is there something more I need to know? I'm curious about these transformers, because I read that Schumachers are some kind of holy grail. Are these Mark III transformers?

Any info welcomed.

 

[screamingdaisy]

Schumacher makes Mesa's trannys. It's not a big deal.

The one marked 562100 is a Mark III output transformer. They used them until they ran out, then switched to the transformer from the Mark IV. There used to be a lot of hype around those transformers because people believed there were only 500 of them and that they were the secret to the Pre-500 sound. Since it's been confirmed the first 2200 amps had them and that a Rev F sounds like a Rev F regardless of whether it has a Mark III or IV tranny in it or it's kind of killed the hype behind them.

Long story short, play loud and enjoy your amp.

 

[zerot0lerance]

Schumacher makes Mesa's trannys. It's not a big deal.

The one marked 562100 is a Mark III output transformer. They used them until they ran out, then switched to the transformer from the Mark IV. There used to be a lot of hype around those transformers because people believed there were only 500 of them and that they were the secret to the Pre-500 sound. Since it's been confirmed the first 2200 amps had them and that a Rev F sounds like a Rev F regardless of whether it has a Mark III or IV tranny in it or it's kind of killed the hype behind them.

Long story short, play loud and enjoy your amp.

Thank you. Well, I'm actually selling this amp and potential buyers say that I'm trying to scam them because it's impossible that this amp has Schumacher transformers *facepalm*. Is there any other source which I can show them to prove that I'm right? Or source that number 562100 means it's a Mark III transformer? It's a good amp, but totally not my thing...

 

[screamingdaisy]

It shouldn't be hard to prove since it has the numbers stamped on the transformers. Like I said, Schumacher made Mesas transformers so I don't see it as being a big deal unless they're trying to hard-ball your price down.

Google Recto 562100 and pick a link that talks about it being in the early Rectos and how great it is.

 

[Shemham]

I don't know if you've noticed, but that particular unit seems to be modified a bit. I find at least one extra capacitor on V3 preamp tube and some strange connection on one LDR that aren't there on your typical RevF. Some of the traces on the outer sides of the PCB has also been replaced with a green wire which might be related to worn traces. You could ask a qualified tech or Mesa to revert them as they will impact the sales.

 

[Silverwulf]

Technically the 562100 was first used in some late production 100W IIC+ models, but people tend to associate it with the III. It was just thr default Mesa 100W model at the time. There's virtually no sonic difference in that transformer versus what you see in Rev G. However, it's speculated that the 562100 is actually less reliable. Personally, I'd rather have the "IV" transformer any day.

 

[YellowJacket]

Schumacher makes Mesa's trannys. It's not a big deal.

The one marked 562100 is a Mark III output transformer. They used them until they ran out, then switched to the transformer from the Mark IV. There used to be a lot of hype around those transformers because people believed there were only 500 of them and that they were the secret to the Pre-500 sound. Since it's been confirmed the first 2200 amps had them and that a Rev F sounds like a Rev F regardless of whether it has a Mark III or IV tranny in it or it's kind of killed the hype behind them.

Long story short, play loud and enjoy your amp.

No kidding, guys here have basically disproven the transformer myth by modding their rectos to sound like the early ones. (As I understand it, changing the cap value on the gain pot is largely responsible) The sound isn't so different between a Rev F and a Rev G. The Rev G is darker / warmer and more gutteral sounding. I bet you could approximate the same sound on both by adjusting the EQ settings slightly!

http://www.youtube.com/watch?v=5FFB3JsYMiw