ReVox B750MK2 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 30th June 2004, 09:38 PM   #1
diyAudio Member
 
Join Date: Feb 2004
Location: Argentina
Default ReVox B750MK2

Itīs good in sound quality????
all info abut this vintage amplifier is welcome!!!!
  Reply With Quote
Old 1st July 2004, 07:03 PM   #2
lucpes is offline lucpes  Europe
diyAudio Member
 
Join Date: Dec 2003
Location: Iasi
Send a message via Yahoo to lucpes
Depends, it might need a full checkout to see if there are no oxidized connectors or leaky old Elkos.

I listened to the following old Revox stuff (amps): A50, A78, A722, B780, B251 and the sound was great for their age. The A50 was 30 y/o, had no replaced parts inside and sound was good; maybe a bit hissy & vintage though

Mail me at lucpes79_at_fastmail_dot_fm if you need the B750 service manual - in german unfortunately. Lots of info in there and oh, beware! these things have a whole religion going around them )

How much were you asked for it? Better take it down to your place and give it a run on your own speakers if possible.
__________________
Deep down inside.
  Reply With Quote
Old 1st July 2004, 09:04 PM   #3
diyAudio Member
 
Join Date: Jun 2003
Location: Wroclaw
I know most of the Revox amps.

The wooden case A50 and much bigger alu/steal B750MKII were my favourites.Especially the first one.

From wooden amps more powerfull A 78MKII sounded worse.

The 250/251 series really sucks.
In case of Revox one can say "the newer it is the worst it sounds".

B750MKII was my second favourite and the last good sounding amp from Revox.Give it a nice preamp and it will sound much better.

But I always changed all electrolitics.

Bartek
  Reply With Quote
Old 12th January 2012, 08:48 AM   #4
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
Quote:
Originally Posted by zygibajt View Post
I know most of the Revox amps.

The wooden case A50 and much bigger alu/steal B750MKII were my favourites.Especially the first one.

From wooden amps more powerfull A 78MKII sounded worse.

The 250/251 series really sucks.
In case of Revox one can say "the newer it is the worst it sounds".

B750MKII was my second favourite and the last good sounding amp from Revox.Give it a nice preamp and it will sound much better.

But I always changed all electrolitics.

Bartek
ohh this a dead thread but jus for the hell of it
i repair a B251 i will agree that is terrible equipment what attracts me though is the power supply

its a high power shelf oscillating psu ..inverter type but no IC based...or any other active part ... just resistor capacitors and feedback trafo ......rather odd ..the idea actually originates from Philips and its a complete copy paste of the power supply of the first economic bulb the SL18 or SL25 adopted to operate in other voltage and may be other frequency.

many will say that this type of technology is no longer in use yet its very simple to make .. an after all it has been working for such a long time ...

havent finished my repair yet .... and will scope the all thing around mostly to see if and how a supply like that will effect sound .

Its worth to mention that a Greek company around 1995 try to make the same power supply ( also stolen from the SL18- SL25 circuit ) which actually failed in long run.... it was possible to operate though ...
now days with more experience i found out that the transformer used wasn't proper and then EMI rejection or mains filtering was something completely unknown at the time ...
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

Last edited by east electronics; 12th January 2012 at 08:51 AM.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How much should I pay for a Revox B77? acidbasement Analogue Source 4 15th June 2007 06:23 AM
Revox Agora B ! zeonrider Multi-Way 0 26th January 2007 10:47 AM
revox A78 roebas Solid State 2 16th October 2006 08:38 PM
Help for Revox B739 Bernhard Analogue Source 1 25th April 2005 03:33 PM
Revox A77 opusv Analogue Source 1 6th March 2005 05:44 PM


New To Site? Need Help?

All times are GMT. The time now is 01:05 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright Đ1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2