Guess the amp.....

[SteveP]

We haven't done this in a while and I got a new amp this weekend, so......... let's see who can figure out what it is.

ps. those with 'inside' information shouldn't play


Here's the 'business end'

 

[gyusher]

Hint

We haven't done this in a while and I got a new amp this weekend, so......... let's see who can figure out what it is.

ps. those with 'inside' information shouldn't play Here's the 'business end'

Got to give us a hint. . .

1)- Integrated??
2)- Vintage?
3)- Japenese?
4)- Americal
5)- Nelson Pass design??
6)- Adcom GFA-????


Here's the 'business end'[/QUOTE]

 

[SteveP]

Hints....

-not an integrated,
-Japanese,
~25 yrs old,
not Adcom or Nelson Pass design,


Here's a top view:


-dual mono (actually 4 transformers total)
-power supply caps covered by the square shield center back
-(green tape only there temporarily)

 

[SteveP]

And a bottom view:

4 x 22,000 uF power supply caps

 

[Charivari]

Ya know, SteveP, if you want us to try to guess it, perhaps you shouldn't show a top shot that one can read the name tag on? Or at least cover up that portion of the face plate?

- JP

 

[Jon S]

Sony TA-F77es? the one with the BIG vue meters on the front....

 

[bigphil]

Looks like one serious amp.

 

[SteveP]

Closer...

It is a Sony, but not that model, and no vu meters.

 

[wualta]

Gotta be the TA-N7b.

 

[SteveP]

Bingo! TA-N7B. 100wpc V-Fet

I'll start a separate thread about it (and the matching preamp) tonight. I don't have any photos here at work.

Steve.

 

[wualta]

Interestingly, it's a hybrid BJT / VFET design, which is mysterious and intriguing. I'm very curious to hear how it sounds.

 

[SteveP]

Yes, it is a hybrid design. If you look in the first picture at the top of this thread you can see the V-FETs and the BJTs. On the heatsink for each channel there are 6 V-FETs ( the large T0-3 devices) and 6 BJTs ( smaller T0-220s beneath the V-FETs). I've only listened to it on my crappy workshop speakers so far, but the results are very promising. I believe mine also has a small biasing issue and may not be showing its full potential, but I will drag it in and do a comparison on my full system soon.

btw, here is a scan of the output stage showing the hybrid arrangement.

Steve.

 

[Manitoulin]

Steve, how about a pic of the front for those of us that are Sonyically :lmao: challenged?

 

[SteveP]

Sorry, I don't have any more pictures with me right now---I'll post more in a new thread tonight.

But for now, you can get an idea what it looks like by going to Axel's excellent site:

http://www.thevintageknob.org/VFET/TAN7/TAN7.html