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PostPosted: Fri Sep 09, 2016 9:54 pm 
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Rev C confirmed:

Image

...and, there certainly are differences. Details to follow.

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PostPosted: Sat Sep 10, 2016 11:33 am 
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Nice. I'm starting to see yet another revision hype coming up... :lol:

BTW, it would be nice if (detailed) photographs were taken of each PCB revisions and uploaded here so most of the differences could be deduced by comparison.


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PostPosted: Mon Sep 12, 2016 10:50 pm 
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Bottle Rocket

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New to the Forum, First post!
Saw this thread and thought I'd add what I have.

Dual Recto
Bought it off eBay, guy says he thinks it was around 2003 when he bought it new. 32xxx
I haven't opened it up but after reading this thread and a few others when i get a chance I will and take some pics.
It has some Mesa tubes in it and I have some extras he sent with it.
I thought it was pretty cool the guy sent the manual with all the tags taped in it.

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PostPosted: Mon Sep 12, 2016 10:55 pm 
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Welcome LouE! If you get a chance to open it up and check out the revision, that would be great. What you have is still in the grey area right now. The latest confirmed Rev C+ is in the 27,000 range, and the earliest confirmed Rev E is around 37,000. So, there should be a Rev D in that span. Your 32,000-ish amp could either narrow the range for us, or could be the first confirmed Rev D.

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PostPosted: Mon Sep 12, 2016 10:57 pm 
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Shemham wrote:
Nice. I'm starting to see yet another revision hype coming up... :lol:

BTW, it would be nice if (detailed) photographs were taken of each PCB revisions and uploaded here so most of the differences could be deduced by comparison.


I have info and detailed photos for Rev C and Rev C+ now. I have a buddy that has what I assume is a Rev E. I'm going to ask to borrow it to dissect and document this week. Lots of stuff to update, but I'm waiting until I get some more stuff documented first.

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PostPosted: Tue Sep 13, 2016 6:47 pm 
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Bottle Rocket

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Well, there ya go.

Image

Image

Image

MTV helped assemble my amp.

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PostPosted: Tue Sep 13, 2016 10:44 pm 
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Thanks LouE! This is a tremendous help. This dates Rev E down to the 32,000 range. With Rev C+ going to at least 27,000 or so, we've only got a 5,000 unit window for a Rev D to be made. So, it was either very short lived, or bypassed completely.

Anyone out there have a Recto in that range that can chime in (28000 - 31000 or so)?

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PostPosted: Tue Sep 20, 2016 12:51 pm 
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Mark II

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3ch Dual Rectifier 2002
S/N 031962
Rev E

Original Tubes:
6L6GC STR430
12AX7 Russian 2

I bought this amp brand new in factory sealed box from Steve @ Guitar Center in Seven Corners, VA.
No mods, still running original tubes. Great sounding example.


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PostPosted: Tue Sep 20, 2016 1:41 pm 
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3124+ wrote:
3ch Dual Rectifier 2002
S/N 031962
Rev E

Original Tubes:
6L6GC STR430
12AX7 Russian 2

I bought this amp brand new in factory sealed box from Steve @ Guitar Center in Seven Corners, VA.
No mods, still running original tubes. Great sounding example.


Awesome. This is great information, and helps narrow the gaps even further. I have a buddy with a Rev E. As soon as I get a chance to document it, I'll get the update made. I've got Rev C and Rev C+ documented and photographed.

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PostPosted: Tue Sep 20, 2016 1:43 pm 
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Is there anyone with a mid to late 40,000 serial 3 channel that can confirm what revision they have?

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PostPosted: Tue Sep 20, 2016 2:30 pm 
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Mark II

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Silverwulf wrote:
Is there anyone with a mid to late 40,000 serial 3 channel that can confirm what revision they have?


3ch Dual Rectifier 2007
S/N 048483
Rev E


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PostPosted: Tue Sep 20, 2016 3:20 pm 
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3124+ wrote:
Silverwulf wrote:
Is there anyone with a mid to late 40,000 serial 3 channel that can confirm what revision they have?


3ch Dual Rectifier 2007
S/N 048483
Rev E


You're on a roll! I'll grab the Rev E from my buddy this weekend and get a full update made. I think I've got enough to at least draw some educated assumptions now.

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PostPosted: Sat Sep 24, 2016 10:37 pm 
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Just start Version 1.0 of the guide and added the entry for Rev C! Now posted, will be requesting a sticky.

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PostPosted: Sun Sep 25, 2016 1:44 am 
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Mark III

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Silverwulf wrote:
Just start Version 1.0 of the guide and added the entry for Rev C! Now posted, will be requesting a sticky.


Just read the guide; really, really cool and interesting to read. Definatly sticky material! Great work Silverwulf! I look forward for more. Thanks for sharing your hard work, research, and years of knowledge!

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PostPosted: Sun Sep 25, 2016 5:49 am 
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Mark II

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Thanks for the effort. Also, those are some nice PCB shots. Some initial thoughs:

Compared to rev C+, there are some minor layout changes here and there on the clean channel. Other than that and the mentioned caps, it seems to be pretty much identical. Rev D seems to introduce some other changes, but I need more quality PCB shots to confirm.

Those larger filter caps Silverwulf mentioned are in the low voltage supply circuit and shouldn't have any effect on the tone - unless there was something considerably wrong with it to begin with. Are the B+ supply cap pairs 10uF/450V? If those would be 15uf, that would definitely make the amp more akin to the 2 channel model.


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