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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment. |
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13th Nov 2017, 10:39 pm | #1 |
Hexode
Join Date: Jun 2011
Location: Glossop, Derbyshire, UK.
Posts: 487
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Quad HIFI system
Hi all I have just bought a Quad system 405/1 FM4 33 preamp and a pair of ESL 57 speakers for £410 ( great news ) but the whole system once examined looks as it has been ridden hard and put away wet . Sockets on the ESL 57 have cracked and fallen in to the input transformer along with the dust of ages and fag smoke , the FM4 has the usual RIFA cap blown but the 12v rail is down to 7.8v when the plugin cpu chip is in place ( no led's on the front panel ) the 33 again has the RIFA cap blown ( yet to test the audio side ) and the 405 /1 has the usual burnt pcb and leaking caps with a melted choke .
I have now many hours of fun rebuilding the lot (goes to show the great bargains you can get on line) watch this space for the rebuild Dave
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13th Nov 2017, 11:17 pm | #2 |
Dekatron
Join Date: Jun 2013
Location: East Sussex, UK.
Posts: 3,308
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Re: Quad HIFI system
ESL57's probably have blown treble units as well unless the 405 has been limited. Good luck.
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14th Nov 2017, 10:34 am | #3 |
Hexode
Join Date: Jun 2011
Location: Glossop, Derbyshire, UK.
Posts: 487
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Re: Quad HIFI system
Hi one of the ESL 57 works fine ( the 405 had the limiter resistors fitted) I have yet to test the other one as for the 405 I think it is ideal for a project I have in mind ( new power caps 22000 uf and 2 quad clone amps I bought for £33.50 a few months ago )
Dave
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14th Nov 2017, 11:28 am | #4 |
Dekatron
Join Date: Sep 2015
Location: Southwold, Suffolk, UK.
Posts: 8,293
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Re: Quad HIFI system
BTW what's a Quad "Clone" amp?
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Edward. |
14th Nov 2017, 12:20 pm | #5 |
Hexode
Join Date: Jun 2011
Location: Glossop, Derbyshire, UK.
Posts: 487
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Re: Quad HIFI system
Hi Just tested the 33 preamp and the only 2 things wrong were the RIFA and the bulb I will in due course upgrade it DADA style to the 16v rail to give it better headroom
Dave
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14th Nov 2017, 12:51 pm | #6 |
Octode
Join Date: Jul 2011
Location: Staffordshire Moorlands, UK.
Posts: 1,462
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Re: Quad HIFI system
A copy of a Quad circuit board from China
Cheers, Steve.
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14th Nov 2017, 12:52 pm | #7 | |
Octode
Join Date: Jul 2011
Location: Staffordshire Moorlands, UK.
Posts: 1,462
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Re: Quad HIFI system
Quote:
Cheers, Steve.
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16th Nov 2017, 7:20 pm | #8 |
Hexode
Join Date: Jun 2011
Location: Glossop, Derbyshire, UK.
Posts: 487
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Re: Quad HIFI system
Hi All, I have started to rebuild the Quad ESL 57 speakers The back legs were in a poor state but match sticks in the hole and Gorilla glue worked wonders. A quick wax of the wooden parts removed the muck of ages. Now to the ESL inside the power unit has the old Bulgin type socket ( new IEC one to be fitted ) and the audio transformer has broken sockets ( replaced thanks to RS). I now need to remove the front cover as it has dints in it
Dave
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22nd Nov 2017, 9:46 am | #9 |
Hexode
Join Date: Jun 2011
Location: Glossop, Derbyshire, UK.
Posts: 487
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Re: Quad HIFI system
Hi now the ESL are working I have started on the Quads . The paint on the cases is very tatty has any one got the paint code that they use as a repaint is required
Thanks Dave
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22nd Nov 2017, 1:33 pm | #10 |
Octode
Join Date: Jul 2011
Location: Staffordshire Moorlands, UK.
Posts: 1,462
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Re: Quad HIFI system
As far as I know there are no codes for the Quads and I have seen your question is asked by many folk on the internet and forums.
I am about to paint a 405 and a 44 myself and have just bought the paint from a local car paint specialist who can match any colour and put it in a spray can - they have an analyser but the Quad coulours required further tweaking by eye. Rather than use a semi matte paint the guys recommended that I use matte paint and finish with a semi matte (eggshell) lacquer which they have also supplied. We also noticed that the colours varied a little between the two amps so there was some difference in paints as originally done - perhaps the batches varied over time? I guess they aren't local to you but here's the link to give you an idea of the place - super nice and helpful! http://www.bs-supplies.co.uk/ Hope this helps, Steve.
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Those who lack imagination cannot imagine what is lacking... Last edited by fetteler; 22nd Nov 2017 at 1:50 pm. |