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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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Thread Tools |
17th Jun 2016, 2:22 pm | #61 | |
Tetrode
Join Date: Jun 2016
Location: Worksop UK.
Posts: 77
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Re: Revox A77
Quote:
2 Further points: 1. The capstan shaft finish appears to be a satin (bead blasted) finish, does this pic of it look normal? 2. When cold, and particularly with a full 10.5" in play on RH take-up reel, it tends to stall and spill tape. Ok when warm with empty RH reel. I checked (by hand) the "free-ness of the motors with brakes disabled, the LH spins free and silent, the RH has a noticeably more drag with audible noise, so points to faulty bearings. Could this be the source of the tape spillage? |
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17th Jun 2016, 2:55 pm | #62 |
Nonode
Join Date: Jun 2009
Location: Herefordshire, UK.
Posts: 2,495
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Re: Revox A77
Sennsai,
Have you checked the physical state of the Rifa (clear yellow plastic) 0.47uF capacitors on the motor board ? Any cracks in their plastic cases? |
17th Jun 2016, 8:11 pm | #63 |
Dekatron
Join Date: Jul 2008
Location: Kington, Herefordshire, UK.
Posts: 3,674
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Re: Revox A77
The finish of the capstan looks quite OK - this was brought in with the Mk3 revision, if memory serves. The stiffness in the motor which clears on warming up certainly sounds like a bearing problem - first thing to check, anyway.
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17th Jun 2016, 8:44 pm | #64 |
Tetrode
Join Date: Jun 2016
Location: Worksop UK.
Posts: 77
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Re: Revox A77
Had a close look, can't see any cracks. I've re-set the 24v rail slightly and lubed all board connectors. It's behaving ok just now but that might be because the motors are warm, so I'll test when cold tomorrow.
I've just looked it up, seems to be a Mk 4 (G207696) |
17th Jun 2016, 9:05 pm | #65 |
Dekatron
Join Date: Jul 2008
Location: Kington, Herefordshire, UK.
Posts: 3,674
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Re: Revox A77
Those Rifas are best replaced anyway. It's not a question of whether they fail, but when, and then the pong and general corruption has to be seen to be believed.
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18th Jun 2016, 4:12 am | #66 | |
Octode
Join Date: Jul 2006
Location: Perth, Western Australia
Posts: 1,969
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Re: Revox A77
Quote:
Tim |
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18th Jun 2016, 1:04 pm | #67 |
Tetrode
Join Date: Jun 2016
Location: Worksop UK.
Posts: 77
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Re: Revox A77
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18th Jun 2016, 3:09 pm | #68 |
Retired Dormant Member
Join Date: Jun 2016
Location: Mojácar, Almería, Spain
Posts: 8
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Re: Revox A77
Yes Andy, but why would you wish to keep using a Revox analogue tapecorder ? When the merest PC World laptop loaded with Adobe Audition will give you 16-bit definition audio that outclasses any 15ips stereo audio you ever recorded ? After 38 years in BBC Network Radio, I couldn't even give away my two A77s to the local Scout Hut radio station - they already had StationPlaylist radio playout software tasting from a 10,000 song database...
When I twenty years ago demo'ed the original Protools digital audio editing application on the Apple platform, which is now universal in radio & TV broadcasting, to a hoary old pre-retirement BBC tape cubicle engineer, and showed him how you could delete a section of recorded audio with one keystroke, then restore it instantly with a second keystroke, he literally burst into tears.. "All those years slashing at my fingertips with a razorblade..." he whined. |
18th Jun 2016, 4:14 pm | #69 | |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,894
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Re: Revox A77
Quote:
I've had an A77 for several decades and I fancy getting it going again just for fun. I'm typing at a perfectly good Apple, with quite a collection of lossless files on it., but I want to explore some of my old tapes again. In a few day's time I will be whizzing around the countryside surrounding a town in the Scottish Borders on horseback along with several hundred other riders, despite there not being anything wrong with the range rover I'll use to get there. I've got an amateur radio transceiver running by my elbow, but nothing heard on it is out of range of my cellphone. Sometimes it's nice to do things you once did, just for fun. HAVING to do it is a completely different matter, of course. David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
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18th Jun 2016, 6:51 pm | #70 |
Octode
Join Date: Feb 2009
Location: Bletchley, Buckinghamshire, UK.
Posts: 1,223
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Re: Revox A77
Sykospain:
There's a big difference between using something for work, and indulging in a technical hobby. When I need to edit a memory stick's worth of conference presentations for a podcast, I wouldn't dream of doing it on on anything but a computer. That's work. But I still have the A77 that I bought new in 1974, keep it maintained in good condition, and enjoy listening to some of the tapes I recorded 30 years ago. Just a bit of harmless fun... |
20th Jun 2016, 5:09 pm | #71 |
Retired Dormant Member
Join Date: Jun 2016
Location: Mojácar, Almería, Spain
Posts: 8
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Re: Revox A77
Fair enough gents ! !
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