Quad amplifiers

[paul_g]

HI,
I'm Paul Graham in Jerusalem,Israel

I have a Quad 33/303 setup,and I am looking for some information.
Are there any Quad experts out there?If so could you be in touch by e-mail
Should I just print my questions here?

thanks,

Paul

paul_g@netvision.net.il

[pinkmouse]

By all means, post your questions here, Paul.

BTW you might want to put your email address in the user settings page, that way it won't be harvested by spambots.

[planet10]

What information do you need?

dave

[audiousername]

You can have a look at the Quad 33 circuit here

[docjoe]

hi, paul
you'll find here all the needed infos about quad amps and ESLs
http://cf.geocities.com/quadfranco/main.html

[DigitalJunkie]

And for ESL info/repairs,etc.
http://www.quadesl.com/

Sheldon probably knows a bit about Quad amps also.

[planet10]

The reason i ask waht is because i'm pretty sure i have some stuff that may not be on any site (ie the 303 schematic most have is one i scanned -- there are actually 2 revisions -- but i've recently pdfed the (skimpy) service manual)

dave

[paul_g]

Hi all,
Thanks for the replies.
First of all,I want to change the R33VOLA potentiometer on the Quad 33 pre-amp,and am wondering if there are any other makes of more audiophile quality pot that would fit the job,perhaps giving better quality than the regular R33VOLA.
Also,has anybody had experience with cancelling out the left/right balance switch.My technician here thinks it could be a good idea.Any opinions?

thanks,

Paul in Jerusalem

[analog_sa]

Paul

In all honesty if you remove everything from a Quad 33 which is really bad for the sound there'll be nothing left. Unless you're really attached to the casework. Looking at the circuit, it seems possible to short (5) and (6) and get rid of tone controls and balance. It is certainly not worthwhile to improve the volume control. IMO, you'd be better off selling it to someone who wants to own a Quad and building a simple pre instead.

Sorry. I'm wrong. There is also a NFB connection from (7), so you might need a 10k resistor between (7) and (6) as well.

[planet10]

Originally posted by analog_sa
you'd be better off selling it to someone who wants to own a Quad and building a simple pre instead.

I concurr (and i've owned a half-dozen 33s (and a 22)). The 303 is worth doing some tweaking too -- a local fellow did a major revamp of this pair of 303 monobloks

http://www.t-linespeakers.org/FALL/Q303.html

and they are quite good.... i've tried & tried to get him to write an article -- he is willing to let the info out just not willing to write it up.

dave