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 Post subject: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 12:40 pm 
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Hello everyone. I'm new to the forum and have owned Fender equipment since the early 80's. This amp has just come to me under interesting circumstances that would take a lot longer to explain than you would want to read. The short version is that it was used and gigged by a national touring act in the 70's...now retired. I assisted the individual that was hired to liquidate the equipment in valuing most of it for sale/auction. This particular item caught my eye and was offered to me at a very reasonable price. This is my first vintage tube amp and I have tried to do some research on it before posting here and asking too many dumb questions.

The chassis code is A50839 which is 1973
All 6 speakers are the original CTS(137) dated 46th week of 1972 and are in exceptional condition. All ohm out ok and are undamaged.
Large transformer code is 606-2-40 which is 40th week of 1972
Small transformer code is 606208 which is 8th week of 1972
The mid size transformer has me a bit baffled....code is 606-3812 which I am having trouble deciphering. Any thoughts?

The power tubes all seem to light and are a mixed bag. The 4 power tubes are all 6L6GC's and left to right looking into the back of the amp are TRAM (Japan, short), REALISTIC LIEFTING (Japan,short) and then the two remaining ones are PHILIPS (USA, long). I'm assuming these aren't the greatest of tubes so I am definitely thinking of replacing them. Your thoughts?

The other 6 small tubes have me baffled for sure. I don't see any rhyme nor reason for their positioning and the differences in them. I could use some education here. These tubes, again continuing from left to right are.....
RCA 7025
RCA 12AT7
PHILIPS 12AX7A (also numbers ECC83 and 7025)
RCA 12AX7A
RCA 7025
No name visible 12AT7 (probably RCA rubbed off)

I have cleaned the tubes/sockets with contact cleaner and also taken out the chassis and cleaned all the pots and switches and I think I am ready to plug in and see what happens. I have read that maybe some caps/resistors should be attended to but I think, depending on the amps performance, I may just take it in to somebody to be service. I do have rudimentary electrical skill but not really sure what to do. I have a number of pics that i will also post just in case anyone is interested by I'm sure you've all seen it before. Thanks for reading this far. Looking forward to getting this beast up to it's full potential.


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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 12:55 pm 
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Welcome runnerman! As you will soon learn, pictures or GTFO is the watch word. Amp porn rules. Sounds like an interesting find, I'm sure Arjay or another of the gurus will have some insights on it. Have fun!

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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 1:14 pm 
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Thanks for the warm welcome Twang.
Here are some pics. I am sorry I can't get the overall pic rotated for some reason...I'll keep working on that!

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I've noticed I had the code wrong on the mid-transformer, it's 606-3872...so maybe 38th week of 1972?


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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 3:18 pm 
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Runnerman wrote:
Hello everyone. I'm new to the forum and have owned Fender equipment since the early 80's. This amp has just come to me under interesting circumstances that would take a lot longer to explain than you would want to read. The short version is that it was used and gigged by a national touring act in the 70's...now retired. I assisted the individual that was hired to liquidate the equipment in valuing most of it for sale/auction. This particular item caught my eye and was offered to me at a very reasonable price. This is my first vintage tube amp and I have tried to do some research on it before posting here and asking too many dumb questions.

The chassis code is A50839 which is 1973
All 6 speakers are the original CTS(137) dated 46th week of 1972 and are in exceptional condition. All ohm out ok and are undamaged.
Large transformer code is 606-2-40 which is 40th week of 1972
Small transformer code is 606208 which is 8th week of 1972
The mid size transformer has me a bit baffled....code is 606-3812 which I am having trouble deciphering. Any thoughts?

The power tubes all seem to light and are a mixed bag. The 4 power tubes are all 6L6GC's and left to right looking into the back of the amp are TRAM (Japan, short), REALISTIC LIEFTING (Japan,short) and then the two remaining ones are PHILIPS (USA, long). I'm assuming these aren't the greatest of tubes so I am definitely thinking of replacing them. Your thoughts?

The other 6 small tubes have me baffled for sure. I don't see any rhyme nor reason for their positioning and the differences in them. I could use some education here. These tubes, again continuing from left to right are.....
RCA 7025
RCA 12AT7
PHILIPS 12AX7A (also numbers ECC83 and 7025)
RCA 12AX7A
RCA 7025
No name visible 12AT7 (probably RCA rubbed off)

I have cleaned the tubes/sockets with contact cleaner and also taken out the chassis and cleaned all the pots and switches and I think I am ready to plug in and see what happens. I have read that maybe some caps/resistors should be attended to but I think, depending on the amps performance, I may just take it in to somebody to be service. I do have rudimentary electrical skill but not really sure what to do. I have a number of pics that i will also post just in case anyone is interested by I'm sure you've all seen it before. Thanks for reading this far. Looking forward to getting this beast up to it's full potential.




Does this Super Six amp have the same circuit as the Twin Reverb
or Showman Reverb or Fender Quad Reverb or Vibrosonic Reverb?
All in The Family :shock:
Thanks. Toppscore

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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 3:19 pm 
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By the way. Welcome :!:
Have fun. Lots of interesting Forums.
Toppscore 8)

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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 4:02 pm 
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Welcome to the Forum. Nice amp, but a bit on the heavy side! Ok, that was probably and understatement since it wieghs 98 pounds. And yes take it to a good amp tech familiar with the arcitecture of the amp. Just because the Power tubes are a mismatch of different companies, if they are matched, it won't matter much...of course a quad of NOS RCA Blackplates would probably sound the best in there, as long as the bias is good and you get no cracking and popping or buzzing, those tubes might be just fine. But as I stated, take it to a good tech and have it checked.

Here is a link to more info on it.

http://ampwares.com/amplifiers/fender-super-six-reverb/

HTH

T2

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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 5:27 pm 
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From what I understand it's the same circuitry as the Super Quad Reverb and the Super Twin Reverb silver faces. Someone on here may know more.

After some wise input from another member here, I checked the electrolytics and load line resistors before going any further. The caps looked good with possibly only a minor bit of leakage on one or it could have been where it touched the cover. The resistors looked as new...clean and bright color bands. I will also get the power tubes tested in the next few days.

That done, I decided to power it up. I let it idol for about 15 minutes and tuned up a couple of guitars. She kicked right in and my pot cleaning was effective as there was no scratchiness at all. I just noodled around at fairly low output gradually getting her cranked into the nasty zone. Tubiness out the wazoo without any pops. The amp seemed to get stronger and more responsive as I went along. I don't know if this was because it sat for so long or if it is a symptom of a problem. Reverb works although I don't know how good it is...seems a bit dull esp. at lower volume. Not sure how to test the reverb tank. All the tone knobs do their thing. After about 15 min it started to get a bit poppy so I backed her down. As I said, everything works except the tremelo which I did not test as I did not have a shorted plug ready. So obviously, I'm very happy that there is nothing big wrong.

It is a heavy beast and not something I will gig with. As you can see from the pics, I will need to probably re-tolex the unit at some point and get some new chrome corners. The grill is probably 8/10 and good enough for me. I will probably take it in next week for a tune up (if I can convince my wife). It's a good thing I have a pickup truck. Here is a couple of pics of the back for the record....sorry they are upside down. My picture hosting site will not let me flip them for some reason. Oh well....just turn your monitor upside down or do some contortions.

Image

Image

Image

Thanks everyone for the warm welcome :D


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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 5:46 pm 
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I believe your "small transformer" is the Reverb Transformer.
Should have three transformers and one choke.

The choke is in-line between the Power transformer and the Output transformer.

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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 5:51 pm 
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Looks clean & clear of corrosion & rust.

Good deal.
All the speakers original?
Toppscore :)

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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 6:37 pm 
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Runner...if the Reverb is a bit weak, try replacing the pre-amp tubes with a known good one. Haven't found a schematic to tell me which one it is, but the old replacing one at a time always works to find it.

By the way those CTS Alnico 10's look sweet and clean, they should give ya some nice tones, they are great speakers. I replaced my 64 Princetons Oxford with one of those and it sure opened up the amp considerably and tone for days!

By the way, thanks for the amp porn, don't see many of these and we Love amp pics here!

HTH

T2

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Last edited by T2Stratman on Wed Sep 05, 2012 7:23 pm, edited 1 time in total.

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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 6:51 pm 
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Welcome to the forums and thanks for showing us your amp. That thing looks like it'd fill an arena with sound. Nice score!

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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 7:35 pm 
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Huge Momma! Does that amp have a push-pull master switch pot?

BTW... 7025, 12AX7, 12AX7A, ECC83 are interchangeable.

The socket you must use a 12AT7 is the reverb driver (V3).

Very nice find. Bet that thing is loud.

http://www.webphix.com/schematic%20heav ... strvol.pdf


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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 8:06 pm 
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BMW, thanks for the tip on the pre-tube ID. That clears a lot up for me because visually they all looked similar and I was thinking that might be the case because of the one tube with all 3 nos on it. I believe the V3 tube was the one that did not light up right away on power up so this might explain the weak reverb. I will replace that one for sure and see what happens. The amp does not have the master pot push-pull which I believe was on the last few years of production only.

Topps, I believe the speakers are all original as they share the same date code which is also consistent with the other dates on the amp components. I believe everything is original except the tubes. The amp sat in storage for many years....probably 20 or more.

This amp + a humbucker in the neck position is ooey gooey good. Unfortunately I have a broken string on my strat so that test is yet to come.


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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Wed Sep 05, 2012 8:08 pm 
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And thanks also BMW for the schematic. I just had a look at it. That is wonderful!


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 Post subject: Re: New (old) amp - Fender Super Six Reverb
PostPosted: Thu Sep 06, 2012 1:31 am 
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I like your amp.
Supposed to be 100 pounds with Oxfords.
1972's are supposed to be 100w of power = four power tubes, right?
The 1972 is supposed to carry a 4-ohm load.
What wattage and ohm values do your speakers have?
How does it all divide out towards each speaker's own share?

I'm interested towards how the amp & speakers handshake
their values to divide with the six speakers?
Thanks ahead of time for the info.
Toppscore :)

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Last edited by Toppscore on Thu Sep 06, 2012 4:38 am, edited 1 time in total.

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