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Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc. |
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8th Apr 2020, 8:15 pm | #1 |
Diode
Join Date: Dec 2019
Location: Cork, County Cork, Ireland
Posts: 6
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Revox A77
hello there,
I bought a Revox A77, that needs a good cleaning and belt change, but as it the version in the wooden box with the loudspeakers, then I am in a bit of a jam in getting the machine out of the cabinet. I don't want to force anything and damage it, I think it must be attached by wires to the speakers on each side ... Have any of you successfully extracted the machine out of the wooden cabinet ? Would be very grateful for some indications on what is preventing me from taking the machine out of the box itself. Thank you in advance. Olaf |
8th Apr 2020, 10:31 pm | #2 |
Dekatron
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 6,587
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Re: Revox A77
Hello Olaf,
You must first remove the Remote Control dummy connector at the top left corner (do not forget to fit it back if you are going to operate it out of its box). If dummy connector is not removed it will foul and stop the chassis from coming out. In the back of the box top right corner (when viewed from front) there are 2 metal pins/prongs which plug into the back of the chassis, these are an electrical safety interlock, the chassis can be a tight fit on and off these pins. There are wires to the speakers that have to be disconnected. There should be a drawing fitted on rear panel of the box inside, explaining how to disconnect the wires, it is very simple, they just pull off at the electronics. I upgraded my chassis A77 to a wooden suitcase and I find it tight/awkward to get it in and out of the case. David |
9th Apr 2020, 10:57 am | #3 |
Moderator
Join Date: Feb 2006
Location: Wembley, Middlesex
Posts: 7,219
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Re: Revox A77
They all were a tight fit even from new.
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9th Apr 2020, 12:11 pm | #4 |
Dekatron
Join Date: Jul 2008
Location: Kington, Herefordshire, UK.
Posts: 3,657
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Re: Revox A77
There is only one belt, and this can be accessed just by removing the deck plate.
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9th Apr 2020, 12:12 pm | #5 |
Dekatron
Join Date: Jun 2013
Location: East Sussex, UK.
Posts: 3,315
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Re: Revox A77
They were tight as Michael says. My way to remove to case was to lay the machine face down on a cushion and lift the back off. It's a lot easier to handle that lifting the machine chassis.
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9th Apr 2020, 2:46 pm | #6 |
Dekatron
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 6,587
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Re: Revox A77
I am sure you will know Olaf, but just to be sure there are chassis fixing/securing screws on the rear of the case that have to be removed, 4 I think.
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12th Apr 2020, 12:50 pm | #7 |
Dekatron
Join Date: Apr 2005
Location: North Wales, UK.
Posts: 6,882
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Re: Revox A77
Just the usual reminder that, once unboxed, it's wise to replace the four RIFA capacitors on the drive board (middle right viewed from the back). As mentioned above, the counter drive belt's easily accessible when the front top panel's removed. Once this is removed and the dummy plug taken out, the chassis 'criss-cross' is handy to give you more leverage. Also, if you intend to run the uncased machine, two banana plugs will be needed to simulate the interlock and the dummy plug replaced.
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14th Apr 2020, 2:31 pm | #8 |
Dekatron
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 6,587
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Re: Revox A77
You have probably done it already, but if not some photos for the speaker connections for reference.
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22nd Sep 2020, 1:11 am | #9 |
Diode
Join Date: Dec 2019
Location: Cork, County Cork, Ireland
Posts: 6
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Re: Revox A77
Thanks all,
I managed to unbox the Revox, I am now slowly recapping all the boards, not in a hurry and triple checking every component that I replace to make sure I do not inadvertently soldering the + and - incorrectly. I will re-control all the boards once I have finished to make sure there are no errors. Been working on my UHERS in-between. Olaf |
22nd Sep 2020, 9:39 am | #10 | |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,798
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Re: Revox A77
Quote:
There are no belts used in the spool drives or the capstan drive. Also no idler wheels. David
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