Can I get the schematic of preamp
If it is possible to get schematic, please sent one to me.
vytas@balticmaster.lt
Thank you
If it is possible to get schematic, please sent one to me.
vytas@balticmaster.lt
Thank you
Quad 44 Schematic
Stuart,
You're a popular fellow, and I, too, am looking for a schematic for the Quad 44 Pre-amp/Control Unit. I'm a new member to the forum, and my email is: tmorris@mail.utexas.edu
Thank you much,
Tom
Stuart,
You're a popular fellow, and I, too, am looking for a schematic for the Quad 44 Pre-amp/Control Unit. I'm a new member to the forum, and my email is: tmorris@mail.utexas.edu
Thank you much,
Tom
Can I get the schematic of Quad 44 preamp
If it is possible to get schematic, please sent one to me.
koopman55@zonnet.nl
Thank you much,
Dirk
If it is possible to get schematic, please sent one to me.
koopman55@zonnet.nl
Thank you much,
Dirk
Most Quad schematics are freely available at Quad Francophone 's website.
As an aside: the output of the 44's final stages should be free of DC offset, so you might as will bypass that tantalum AC coupling cap that's sitting there.
As an aside: the output of the 44's final stages should be free of DC offset, so you might as will bypass that tantalum AC coupling cap that's sitting there.
hmmm,
well I took a look inside my quad 44. Mine is a grey late model with RCA sockets on all the cards.
Mine appears to be slightly different from the schematics
. My Tone controls board has 6 100uF/10v Electrolytic cans
. Two on the left side close to where the cables link back to the outputs. I assume these are for DC blocking and at the very least can be replaced with bipolars. The other 4 are close to the volume control on the right.
Q: So should I replace these six with bipolars ? if so what type. 6 Blackgates will cost more than the preamp, so I wonder if there are any other types that people have found suitable ?
well I took a look inside my quad 44. Mine is a grey late model with RCA sockets on all the cards.
Mine appears to be slightly different from the schematics
. My Tone controls board has 6 100uF/10v Electrolytic cans. Two on the left side close to where the cables link back to the outputs. I assume these are for DC blocking and at the very least can be replaced with bipolars. The other 4 are close to the volume control on the right.
Q: So should I replace these six with bipolars ? if so what type. 6 Blackgates will cost more than the preamp, so I wonder if there are any other types that people have found suitable ?
Analyse the circuit, measure for DC at various points, and then decided which of these AC-coupling caps are really justified. You'll see that Quad went for a belts-and-braces approach.
The opamps are FET input types will a relatively low offset, and the gains overall are not too high, so as long as no DC is passed on from the source component, not too much DC will be generated internally.
The opamps are FET input types will a relatively low offset, and the gains overall are not too high, so as long as no DC is passed on from the source component, not too much DC will be generated internally.
Schematic and overlay for M12784-2
I would very much appreciate a copy of the schematic and overlay for the 'later' version of the Quad 44 tone control circuit. For information my Quad 44 serial no 29xxx has 5 TL072 dual op-amps. Yes Quad service manual is available on the internet but doesnt include this circuit. Quad won't provide directly either- 'change in policy'. My email is brian@bwhindson.fsnet.co.uk
I would very much appreciate a copy of the schematic and overlay for the 'later' version of the Quad 44 tone control circuit. For information my Quad 44 serial no 29xxx has 5 TL072 dual op-amps. Yes Quad service manual is available on the internet but doesnt include this circuit. Quad won't provide directly either- 'change in policy'. My email is brian@bwhindson.fsnet.co.uk
anthony.billg i could use one of those schematics please:my e-mail is kid286@juno.com thanks,have a happy newyear.ps.i was in manchester back in 88-89,worked for platt saco lowell.electronis eng.
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