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Post subject: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RECTIF
Posted: Sun May 20, 2012 9:25 am
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Ithought I was gettin very knowlegable about these FENDER AMPS well the VINTAGE FENDER AMPS ,Ihave this great book I bought off amazon called"60 YEARS OF FENDER AMPS" "THE SOUL OF TONE" Inside the book are 2 cds ONE CD DEMONSTRATES VINTAGE FENDER AMPS AND THE OTHER CD DEMONSTRATES MODERN FENDER AMPS,The CD IS HOSTED AND NARRATED BY GUITAR GURU "GREG KOCH" I think he is fantastic!!! Irecently Aquired a 1966 FENDER SUPER REVERB IT DOES NOT HAVE A SOLID STATE RECTIFER IT TAKES A GZ34 RECTIFIER TUBE,GREG KOCH Like I mentioned performed and VERBALLY described EACH BLACKFACE ON THE CD,When it got to the VINTGE SUPER REVERB,He was demonstrating a 1966 SUPER REVERB just like mine,But this is what he said and I quote"THE 1966 SUPER REVERB IS A DELICIOUS AMPLIFIER AND MY FAVORITE OUT OF ALL THE FENDER AMPS,I LIKE IT BECAUSE OF ITS SOLID STATE RECTIFIER WHICH KEEPS THE AMP CLEANER AT HIGHER VOLUMES" Well my 1966 super reverb is not SOLID STATE ,It holds a GZ34 RECTIFIER TUBE LIKE I MENTIONED.OBVIOUSLY THIS IS NOT A TYPE OUT BY MR KOCH AS THIS WAS ON CD ,ARE THEIR 2 VERSIONS OF THE 1966 SUPER REVERB ONE WITH A SOLID STATE RECTIFIER AND THE OTHER WITHOUT,OR HAS THE EXPERT MR KOCH MADE AN ERROR ABOUT HIS FAVORITE AMP THAT HE USES EXCLUSIVELY?? (SO HE SAYS!!!) THANKS!!


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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Sun May 20, 2012 9:43 am
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Ever SR I seen which were made from 1964 through 1980... had either GZ34 or %u$GB rectifier tubes. Now, there could made been a one-off or post production mod where the socket postion for the tube rectifier with plated-off and soild-state diode substituted.

If i were you I'd try going back to the AB763 circuit with the GZ34 rectifier. This animal lives and breathes in another zone, compared to may other dual 6L6GC Fender amps. IMHO, of course.


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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Sun May 20, 2012 9:49 am
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The Fender Field Guide - which is now run by ampwares.com - has been the go to on-line guide for Fender amps for years. It has every vintage amp listed with the general specs for the amp and photos. You can also find schematics for a lot of the amps.

The Guide says the Super Reverb uses a GZ34

The Guide does note that the Rectifier became a solid state in later Silverface models

Maybe Greg Koch is more entertaining than knowledgeable when it comes to vintage Fender amps. :wink:


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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Sun May 20, 2012 9:55 am
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BMW2002Ti wrote:
Ever SR I seen which were made from 1964 through 1980... had either GZ34 or %u$GB rectifier tubes.


Ahem......

The 1978 and subsequent ultra-linear 70-watt "Super Reverb" platform (and I use that phrase only for the purposes of this discussion since the amp bore little resemblance to a "real" Super Reverb) had a solid-state diode stack replace the previous tube rectifier (either a GZ34 or a 5U4GB).

The OP's assertion re a 1966 Super Reverb is, of course, correct.

Arjay

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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Mon May 21, 2012 2:30 pm
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Arjay, I stand corrected, again. I meant mid 1960-mid 1970's. Too much "poossy" on the mind this weekend. Fuzzy-ups the thougt processes.

It won't happen again (Fender error).


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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Mon May 21, 2012 2:36 pm
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BMW2002Ti wrote:
Too much "poossy" on the mind this weekend. Fuzzy-ups the thougt processes.


That's the only acceptable excuse, Steve.

:mrgreen:

Arjay

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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Mon May 21, 2012 6:43 pm
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And a Darn fine one it is...guarenteed to make most of us have fuzzy thoughts!

T2

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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Mon May 21, 2012 10:51 pm
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koocho wrote:
Ithought I was gettin very knowlegable about these FENDER AMPS well the VINTAGE FENDER AMPS ,Ihave this great book I bought off amazon called"60 YEARS OF FENDER AMPS" "THE SOUL OF TONE" Inside the book are 2 cds ONE CD DEMONSTRATES VINTAGE FENDER AMPS AND THE OTHER CD DEMONSTRATES MODERN FENDER AMPS,The CD IS HOSTED AND NARRATED BY GUITAR GURU "GREG KOCH" I think he is fantastic!!! Irecently Aquired a 1966 FENDER SUPER REVERB IT DOES NOT HAVE A SOLID STATE RECTIFER IT TAKES A GZ34 RECTIFIER TUBE,GREG KOCH Like I mentioned performed and VERBALLY described EACH BLACKFACE ON THE CD,When it got to the VINTGE SUPER REVERB,He was demonstrating a 1966 SUPER REVERB just like mine,But this is what he said and I quote"THE 1966 SUPER REVERB IS A DELICIOUS AMPLIFIER AND MY FAVORITE OUT OF ALL THE FENDER AMPS,I LIKE IT BECAUSE OF ITS SOLID STATE RECTIFIER WHICH KEEPS THE AMP CLEANER AT HIGHER VOLUMES" Well my 1966 super reverb is not SOLID STATE ,It holds a GZ34 RECTIFIER TUBE LIKE I MENTIONED.OBVIOUSLY THIS IS NOT A TYPE OUT BY MR KOCH AS THIS WAS ON CD ,ARE THEIR 2 VERSIONS OF THE 1966 SUPER REVERB ONE WITH A SOLID STATE RECTIFIER AND THE OTHER WITHOUT,OR HAS THE EXPERT MR KOCH MADE AN ERROR ABOUT HIS FAVORITE AMP THAT HE USES EXCLUSIVELY? (SO HE SAYS!) THANKS!


Fender unique amp?
Fender mistake?
Later third party upgrade?
Writer mistake?
Koch mistake?
Tube rectifiers (vs) solid state rectifiers?
Another "puiblished" Fender mystery! :shock:

Toppscore 8)

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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Tue May 22, 2012 6:33 am
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Retroverbial wrote:
BMW2002Ti wrote:
Too much "poossy" on the mind this weekend. Fuzzy-ups the thougt processes.


That's the only acceptable excuse, Steve.

:mrgreen:

Arjay

:lol: :lol: :lol: :lol: :lol:


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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Mon Jun 25, 2012 8:45 am
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Hey Dudes,

I was speaking of the specific 1966 Super Reverb I was using that had a solid state rectifier. This is something that folks put in to give them more clean headroom. I didn't mean to imply that all of them have them or that it was a feature they originally came with. That apparently got lost in translation. Sorry about that;-)

G


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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Mon Jun 25, 2012 11:39 am
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You know, it's that GZ34 that gives a lot of the unique tone to the SR's AB 763 circuit. A good GZ34/5AR4 has nice headroom, but still has the internal impedance unique to a tube rectifier (as solid-state has near zero impedance).

If those solid-state diodes are wired across the tube rectifier's socket, you may want to try a good used Mullard GZ34 or Sylvania/GE 5AR4--- removing & insulating one leg of each SS diode. My bet is you are going to like the tube rectifier better.

Check the output tubes bias, if you go for this change.


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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Mon Jun 25, 2012 12:12 pm
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gristleman wrote:
Hey Dudes, I was speaking of the specific 1966 Super Reverb I was using that had a solid state rectifier. This is something that folks put in to give them more clean headroom. I didn't mean to imply that all of them have them or that it was a feature they originally came with. That apparently got lost in translation. Sorry about that;-) G


Hey, Greg. Nice book!
"Lost In Translation" is a perfect slogan for some of Fender's "Transitional" amps :lol:

Please share about the solid state rectifier used in the 1966 Super Reverb?
Manufacturer or which amp did it come from?
Where was it installed?
How big is it?
Were any modifications done to the rectifier tubes?

Thanks, Toppscore 8)

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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Mon Jun 25, 2012 5:26 pm
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I understand what you're saying Gristle. For any solid state rectifiers I prefer the FRED diodes, very low switching noise. Art

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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Mon Jun 25, 2012 5:42 pm
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aclempoppi wrote:
I understand what you're saying Gristle. For any solid state rectifiers I prefer the FRED diodes, very low switching noise. Art


So, Art ~ new info for me . . . .
What are the modified SS rectifiers like?
Any pictures?
Where are the the SSR's installed within the chassis area?
or are they installed near the speakers?
What happens to the normal rectifier tubes when substituting with SS rectifiers?

Thanks for the info. Toppscore 8)

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Post subject: Re: GREG KOCH SAYS A 1966 SUPER REVERB HAS A SOLID STATE RE
Posted: Mon Jun 25, 2012 10:09 pm
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I was referring to Fender's with a stock solid state rectifier section. FREDs are just a type of diode. So no mod is happening. It's just a component choice, akin to tube choices. Art

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