Years ago when I had a working one I noticed it took a long time
to warm up so I ofton covered the heatsinks for 1/2 hour or so!
After using it 3 or 4 years it failed and the local repair shop couldn't fix it but turned it into a 120w 2hz square wave generator! By the way there is a thread here dealing with this amp look for " what to do with a dead amplifier "
to warm up so I ofton covered the heatsinks for 1/2 hour or so!
After using it 3 or 4 years it failed and the local repair shop couldn't fix it but turned it into a 120w 2hz square wave generator! By the way there is a thread here dealing with this amp look for " what to do with a dead amplifier "
Heart Throbbing Sentimental Quatre
Hey Phil
Thanks loads for the offer to check out the Quatre. I am presently waiting to get my Dynaco 120 and if it works I will probably be using with my Dahlquists. At that point I would probably not have a good use for the Quartre and someone with a soft spot for it may be able to talk me into some horse trading. I also have a Dynaco 70 around here somewhere that I cannot find and that is why I purchased the 120 on Craigslist. All is in the air right now but that 100% failure mentioned above causes for some concern. Next week I will be leaving for a couple months so I will not be modifying or repairing yet.
Thanks
Bill
Hey Phil
Thanks loads for the offer to check out the Quatre. I am presently waiting to get my Dynaco 120 and if it works I will probably be using with my Dahlquists. At that point I would probably not have a good use for the Quartre and someone with a soft spot for it may be able to talk me into some horse trading. I also have a Dynaco 70 around here somewhere that I cannot find and that is why I purchased the 120 on Craigslist. All is in the air right now but that 100% failure mentioned above causes for some concern. Next week I will be leaving for a couple months so I will not be modifying or repairing yet.
Thanks
Bill
You're very welcome Bill!!
Yes -- please keep this sentimental middle-aged fool in mind if you decide to sell those. I hope this doesn't lead me to tracking down a pair of DQ-10s!! Part of my interest is curiosity, another part is that those were my first "high-end" amps, and last that I figured out how to repair/upgrade them.
Phil
Yes -- please keep this sentimental middle-aged fool in mind if you decide to sell those. I hope this doesn't lead me to tracking down a pair of DQ-10s!! Part of my interest is curiosity, another part is that those were my first "high-end" amps, and last that I figured out how to repair/upgrade them.
Phil
Eureka !
I just hooked up the Quarte for the first time, connected it to my JBLs.
Sounds wonderful. I purchased a KLH sub with a non working amp at a garage sale and the guy said he just ran it off the Quarte. I bought the sub for like $20 and I asked him if he would just sell me the old amp...Yup--another $20 and the Quarte was mine. 1 1/2 years passed by and I finally today hooked up the Quarte. If I get rid of it --it is yours. Dahlquists around here [Seattle} sell for $150- $250 and then need new foam surrounds, $30 and very easy to replace without removing dust cover.
Bill
I just hooked up the Quarte for the first time, connected it to my JBLs.
Sounds wonderful. I purchased a KLH sub with a non working amp at a garage sale and the guy said he just ran it off the Quarte. I bought the sub for like $20 and I asked him if he would just sell me the old amp...Yup--another $20 and the Quarte was mine. 1 1/2 years passed by and I finally today hooked up the Quarte. If I get rid of it --it is yours. Dahlquists around here [Seattle} sell for $150- $250 and then need new foam surrounds, $30 and very easy to replace without removing dust cover.
Bill
I've some Quatre boards for sale
If anyone is interested...
I've got some old circuit boards, complete with output devices,
which I removed from a pair of DG250/C I bought on eBay(with the intention of recycling the chassis for some Leach amps I'm currently building). I also have one power transformer available.
I was thinking of listing them in the DIY Marketplace,but if anyone here is interested in one or all , please email me with any reasonable offer.
-Chas
If anyone is interested...
I've got some old circuit boards, complete with output devices,
which I removed from a pair of DG250/C I bought on eBay(with the intention of recycling the chassis for some Leach amps I'm currently building). I also have one power transformer available.
I was thinking of listing them in the DIY Marketplace,but if anyone here is interested in one or all , please email me with any reasonable offer.
-Chas
Image of Quatre
Thanks
Bill
Thanks for the images of the Quatre. Would it be possible to send me a higher resolution picture so I may print it out full size? My Quatre is probably the 250 although it does not say that anywhere. My front panel is brushed silver with Quatre in the upper left corner and a small red power light at the center bottom with no handles or rack mount capabilities, just a 3/4' overlap of the front panel at the sides.. probably really early model because serial # is 1419.PH104 said:
Thanks
Bill
Bill --
I'd be happy to. If you send me your email address, I can send you better scans and also some pics of my old Quatre's -- at least some parts of them. I'm kicking myself now for tossing out the circuit boards. One of my chassis has the s/n 2-1643 and I think it was made near the end Quatre's lifespan. Questions:
1. Is there some lettering on the top of the power transformer?
2. Does the amp say QMI anywhere?
3. What color are the circuit boards?
4. Are the square emitter power resistors back by the heatsink mounted vertically or flat on the board?
Phil
I'd be happy to. If you send me your email address, I can send you better scans and also some pics of my old Quatre's -- at least some parts of them. I'm kicking myself now for tossing out the circuit boards. One of my chassis has the s/n 2-1643 and I think it was made near the end Quatre's lifespan. Questions:
1. Is there some lettering on the top of the power transformer?
2. Does the amp say QMI anywhere?
3. What color are the circuit boards?
4. Are the square emitter power resistors back by the heatsink mounted vertically or flat on the board?
Phil
Quatre Pics
bill@wizardint.com
Took the top off just for you--First time I have looked inside. Simplicity at its finest. So clean looking--I'm impressed.
1. 7256-71 on top of Transformer in white lettering
2. No QMI that I can see
3. Green Boards labeled Quatre 100A on both
4. Vertically and parallel with the back panel not mounted on board but on standoffs mounted to the back panel.
Too Bad you got rid of those boards.
Bill
Thanks for the Pic. offerPH104 said:
bill@wizardint.com
Took the top off just for you--First time I have looked inside. Simplicity at its finest. So clean looking--I'm impressed.
1. 7256-71 on top of Transformer in white lettering
2. No QMI that I can see
3. Green Boards labeled Quatre 100A on both
4. Vertically and parallel with the back panel not mounted on board but on standoffs mounted to the back panel.
Too Bad you got rid of those boards.
Bill
I'll get the pics off tomorrow.
I bought the Quatre boards from clm811. I thought they might be the same generation as yours but the power resistors are mounted on-board vertically on those.
My transformers have QMI printed on top and date codes from 1979 so I think you are right that yours is an early one. At some point, Quatre either became QMI or was bought out by them, I'm no sure which.
I bought the Quatre boards from clm811. I thought they might be the same generation as yours but the power resistors are mounted on-board vertically on those.
My transformers have QMI printed on top and date codes from 1979 so I think you are right that yours is an early one. At some point, Quatre either became QMI or was bought out by them, I'm no sure which.
Those are likely the MPS-U56 or MPS-U57 / MPS-U06 or MPS-U07 or the 2N6556 / 2N6553 parts for the drivers. The former are Motorola's in a tiny case, the later are in a slightly larger TO-202 case. Both types were actually a bit underpowered for the job, and should be replaced with something having more than a 2A rating, the 2N6556/6553 were rated at 100V/1A/2W the MPS-Uxx I think were rated at 100V/2A/1.75W in either case they were marginally rated for the task, and would take the outputs with them, maybe the speaker too. Today a much safer, better choice would be the MJE-15030G / MJE-15031G, or MJE-15032/MJE-15033. For the output devices I concur: MJ-15024, or MJ21194, or MJ21196's.
-Steven
-Steven
PH104 said:
Steve -- thanks for the input. Good calls!
Quatre went through 2 (that I know of) iterations for the VAS and pre-drivers. The early versions used MPS-U10 and -U60. Later versions used MDS-60 and 2N6658. And yes -- these would blow taking o/p transistors with them. Never the drivers as far as I know.
SQLGuy's search for the 2N6556 triggered some old brain cells so I was just looking through a junk parts bin and 1974 Motorola data books. It must have been that 2N6558 I was thinking about.
The MJE-150XX series were just coming out when I rebuilt my Quatres so I used MJE340s and 350s as replacements. Worked fine (i.e., reliably) but not what I would use today of course.
Phil
Quatre went through 2 (that I know of) iterations for the VAS and pre-drivers. The early versions used MPS-U10 and -U60. Later versions used MDS-60 and 2N6658. And yes -- these would blow taking o/p transistors with them. Never the drivers as far as I know.
SQLGuy's search for the 2N6556 triggered some old brain cells so I was just looking through a junk parts bin and 1974 Motorola data books. It must have been that 2N6558 I was thinking about.
The MJE-150XX series were just coming out when I rebuilt my Quatres so I used MJE340s and 350s as replacements. Worked fine (i.e., reliably) but not what I would use today of course.
Phil
Bill -- I found an old post from Audio Asylum that makes me wonder if we're talking about the same Quatre amplifier.
"Posted by TAFKA Steve (A ) on June 8, 2006 at 00:40:23
In Reply to: Quatre Preamplifier posted by Jesscott on June 7, 2006 at 20:23:09:
The Quatre BOD 1 preamp was designed by Dr. Bob O'Dell (also designed the PS Audio 200C amplifier and one of the HK Citation amps) and sold factory-direct. It was manufactured by Quatre (headed by Guy Hickey) of Canoga Park during the mid- to late-70's. It is pretty rare, and was often partnered with Quatre's DLH 100 amplifier (before their Gain Cell/Dave Gore-designed amps). The company went out of business in the early 80's. "
I didn't know that Quatre made an amp before the Dave Gore Gain Cell series, which is what I'm familiar with. Maybe you have the DLH 100 that is mentioned above???
Hopefully more pics will help.
"Posted by TAFKA Steve (A ) on June 8, 2006 at 00:40:23
In Reply to: Quatre Preamplifier posted by Jesscott on June 7, 2006 at 20:23:09:
The Quatre BOD 1 preamp was designed by Dr. Bob O'Dell (also designed the PS Audio 200C amplifier and one of the HK Citation amps) and sold factory-direct. It was manufactured by Quatre (headed by Guy Hickey) of Canoga Park during the mid- to late-70's. It is pretty rare, and was often partnered with Quatre's DLH 100 amplifier (before their Gain Cell/Dave Gore-designed amps). The company went out of business in the early 80's. "
I didn't know that Quatre made an amp before the Dave Gore Gain Cell series, which is what I'm familiar with. Maybe you have the DLH 100 that is mentioned above???
Hopefully more pics will help.
"Rare" DG250 4 sale on eBay "Cheap" ;-)
Somebody selling a DG250(case looks awful) on eBay(for about 4x the going price). Maybe he'll get a clue to its value if someone makes him a reasonable offer...
http://cgi.ebay.com/Quatre-Gain-Cel...0|66:2|65:12|39:1|240:1318|301:1|293:1|294:50
It's a decent-sounding amp(if it works), but I wish him luck finding a buyer for a fraction of the asking price in that condition!
-Chas
Somebody selling a DG250(case looks awful) on eBay(for about 4x the going price). Maybe he'll get a clue to its value if someone makes him a reasonable offer...
http://cgi.ebay.com/Quatre-Gain-Cel...0|66:2|65:12|39:1|240:1318|301:1|293:1|294:50
It's a decent-sounding amp(if it works), but I wish him luck finding a buyer for a fraction of the asking price in that condition!
-Chas
Re:" Quatre Gain Cell Dg 250 C Rare Amplifier Cheap(?)Buy Now! "
It looks like 250C boards were retrofitted to an original 250 chassis; no doubt when it was in for the customary repair.
I've bought two of them for less than $100 (both had blown up as usual) and rather than restore I used the cases(in fine shape) to house some nice, reliable Leach Low-TIM amps.
The Leach is not only a better amp, but won't blow up my precious speakers!
See picture attached.
It looks like 250C boards were retrofitted to an original 250 chassis; no doubt when it was in for the customary repair.
I've bought two of them for less than $100 (both had blown up as usual) and rather than restore I used the cases(in fine shape) to house some nice, reliable Leach Low-TIM amps.
The Leach is not only a better amp, but won't blow up my precious speakers!
See picture attached.
Attachments
Quatre porn
Hi everyone,
Complete rookie here; this is my first post. Sorry to hijack a thread, but it's been a few months without comment, and this seemed to be a good initial conversation.
My uncle loves to give me his old audio equipment, and his latest gift to me is a Quatre Gain Cell DG 250C.
Years ago, he gave me a set of DQ 10s with stands, sub, both active and passive crossovers. Little did I know that he was stoking me with the ultimate 70's set up! Anyway, my wife eventually forced me to sell the Dahlquists, but I sure miss the way those things could fill a room with sound.
Anyway, I though I would post a pic or two of the Quatre guts and ask a question. There seems to be some black goop smooshed onto the circuit board (are those transistors?). I know zero about electronics, so I am curious as to what it could be.
The amp powers on without noise, but I have yet to hook it up to anything. I am a bit afraid, given all the "my system got fried" stories. When my uncle last used it, it worked just fine.
He also says he has another one that he has yet to uncover (they just moved), so I may actually have two of these. My plan is to sell them, but I want to get an idea of their condition. If I take them to my local audio guy, he'll take a month to check them out, and probably stick me with a bill half the value of the amps!!
Any and all advice and comments are welcome.
Hi everyone,
Complete rookie here; this is my first post. Sorry to hijack a thread, but it's been a few months without comment, and this seemed to be a good initial conversation.
My uncle loves to give me his old audio equipment, and his latest gift to me is a Quatre Gain Cell DG 250C.
Years ago, he gave me a set of DQ 10s with stands, sub, both active and passive crossovers. Little did I know that he was stoking me with the ultimate 70's set up! Anyway, my wife eventually forced me to sell the Dahlquists, but I sure miss the way those things could fill a room with sound.
Anyway, I though I would post a pic or two of the Quatre guts and ask a question. There seems to be some black goop smooshed onto the circuit board (are those transistors?). I know zero about electronics, so I am curious as to what it could be.
The amp powers on without noise, but I have yet to hook it up to anything. I am a bit afraid, given all the "my system got fried" stories. When my uncle last used it, it worked just fine.
He also says he has another one that he has yet to uncover (they just moved), so I may actually have two of these. My plan is to sell them, but I want to get an idea of their condition. If I take them to my local audio guy, he'll take a month to check them out, and probably stick me with a bill half the value of the amps!!
Any and all advice and comments are welcome.
