My first YAMAHA

Sony, Yamaha, Sansui & JVC/Victor V-FET

My first YAMAHA

Postby pat66 » Thu Jul 08, 2010 2:29 pm

Hello,



I'm glad to fire up this new thread with some pictures of  the inside of my first YAMAHA  :P




Image
User avatar
pat66
Knobber
 
Posts: 13
Joined: Thu Jul 08, 2010 8:50 am
Location: Perpignan - France

Re: My first YAMAHA

Postby Stoffie » Sat Jul 10, 2010 9:00 am

Nice! And in the background an ESPRIT TA-E901 and an ELCAset deck! You lucky man! :mrgreen:
User avatar
Stoffie
Knobber
 
Posts: 99
Joined: Tue Jun 29, 2010 9:10 pm
Location: Belgium

Re: My first YAMAHA

Postby pat66 » Sat Jul 10, 2010 9:20 am

Hi Stoffie,

Yes you are right for the background  :mrgreen:

Image

 Just for compare : the B2 heat sink and the SONY's TA-F7
User avatar
pat66
Knobber
 
Posts: 13
Joined: Thu Jul 08, 2010 8:50 am
Location: Perpignan - France

Re: My first YAMAHA

Postby Stoffie » Sun Jul 11, 2010 10:10 am

Yep, Sony units never seem to have big enough heatsinks in comparison.
User avatar
Stoffie
Knobber
 
Posts: 99
Joined: Tue Jun 29, 2010 9:10 pm
Location: Belgium

Re: My first YAMAHA

Postby the-real-mandak » Mon Jul 12, 2010 5:19 pm

Stoffie wrote:Yep, Sony units never seem to have big enough heatsinks in comparison.

Now that must be why I am hooked on the Yamaha models  ;)

BTW. Pat66, that is a really nice and clean B-2 you got there.
User avatar
the-real-mandak
Knobber
 
Posts: 11
Joined: Mon May 31, 2010 12:59 am
Location: Denmark

Re: My first YAMAHA

Postby roger456 » Wed Jul 14, 2010 10:33 am

i also have yamaha B-2, i already re-new all E-CAp inside, the sound was superb, sweet and clear, also have tube taste, nice bass as well, highly recommand you renew this AMP, you will know the B-2 engineer, what they want you listen, what is original sound 
roger456
 
Posts: 1
Joined: Wed Jul 14, 2010 10:09 am
Location: Hong Kong

Re: My first YAMAHA

Postby Unda Maris » Wed Jul 14, 2010 3:43 pm

As I know, the B-2 runs as hot as the hottest Sonys ...  :mrgreen: And: Only a hot V-FET amp is a good one ... :mrgreen:
User avatar
Unda Maris
Knobber
 
Posts: 29
Joined: Tue Apr 13, 2010 7:08 pm
Location: Germany

Re: My first YAMAHA

Postby pat66 » Thu Jul 15, 2010 3:32 pm

Unda Maris wrote:As I know, the B-2 runs as hot as the hottest Sonys ...  :mrgreen: And: Only a hot V-FET amp is a good one ... :mrgreen:

Happy to read you again Unda Maris  :D  A V-FET amp must be as hot as tubes are, otherwise it sounds like a ... transistor amp  :mrgreen:
User avatar
pat66
Knobber
 
Posts: 13
Joined: Thu Jul 08, 2010 8:50 am
Location: Perpignan - France

Re: My first YAMAHA

Postby pat66 » Thu Jul 15, 2010 3:42 pm

The heat sinks are really big but some other parts are undersized like those "power" resistors on the power supply board.

Too close to the printed board and too weak  :cry:



Image
User avatar
pat66
Knobber
 
Posts: 13
Joined: Thu Jul 08, 2010 8:50 am
Location: Perpignan - France

Re: My first YAMAHA

Postby Unda Maris » Fri Jul 16, 2010 2:58 pm

The not-so-smart use of power resistors seem to plague many Yamahas of this time, especially the C-I and B-I. Even the resistors themselves seem to be pretty small for their rating (optimistic supplier) ...
Sometimes (in order to further disimprove things) they even wrapped a small piece of glass fiber hose around the power resistor, which heats the resistors even more at wire leads (melting the solder joints).
Pretty stupid from an engineering point of view ... Nevertheless this is not as much "brown engineering" as the notoriously wrong (upside down) mounted power resistors on the Epoxy PCB of the TA-N88 PLPS  :oops:
User avatar
Unda Maris
Knobber
 
Posts: 29
Joined: Tue Apr 13, 2010 7:08 pm
Location: Germany

Next

Return to V-FET

Who is online

Users browsing this forum: No registered users and 2 guests

cron