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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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1st Aug 2020, 1:47 am | #1 |
Hexode
Join Date: Oct 2017
Location: Manchester, UK.
Posts: 363
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Anyone know what this is out of?
Hi,i know this is a long shot but wondered if anybody recognises this circuit board,have taken a couple of pics and the only other clue is date on electrolytic is oct 59,there is a pot core of some sort and what i think is a output transformer.
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1st Aug 2020, 2:05 am | #2 |
Dekatron
Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 5,554
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Re: Anyone know what this is out of.
It looks like the audio output stage and bias oscillator from a tape recorder.
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1st Aug 2020, 4:49 am | #3 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,902
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Re: Anyone know what this is out of.
The pot core is the give away. There is a large-ish switch for record/play mode, and there looks to be an angled extension board to carry a socket for a magic eye.
Fee fo fi dum... I see a few red and black Plessey electrolytic capacitors which would seem to rule out Philips, and possibly Grundig So who else was making cheapish tape recorders in 1960? Probably one of the British radio brands, maybe early Elizabethan? David
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1st Aug 2020, 5:03 am | #4 |
Nonode
Join Date: Oct 2010
Location: Tintinara, South Australia, Australia
Posts: 2,342
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Re: Anyone know what this is out of.
If you could identify the logo on the bottom (approx middle of board - lightning flash over a speaker grill?), it would tell you brand.
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2nd Aug 2020, 12:34 am | #5 |
Hexode
Join Date: Oct 2017
Location: Manchester, UK.
Posts: 363
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Re: Anyone know what this is out of.
Hi, I thought it was a tape recorder as well, it's one of those things I have had kicking around for years, no idea where from, am planning to use the transformer at some time.
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2nd Aug 2020, 12:52 am | #6 | |
Octode
Join Date: Sep 2017
Location: Bristol, UK.
Posts: 1,659
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Re: Anyone know what this is out of.
Quote:
Mike |
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2nd Aug 2020, 6:37 am | #7 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,902
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Re: Anyone know what this is out of.
That's likely, Mike. Those retainer springs and the lack of another socket.... I'm assuming it was an (ECC83 or EF86) + ECL86 sort of thing. 1960 would be a bit early for automatic recording level control, so I guessed there would have to be an eye around somewhere.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
2nd Aug 2020, 10:54 am | #8 | |
Octode
Join Date: Sep 2017
Location: Bristol, UK.
Posts: 1,659
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Re: Anyone know what this is out of.
Quote:
Mike |
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5th Aug 2020, 9:33 am | #9 |
Octode
Join Date: Dec 2017
Location: Morden, Surrey, UK.
Posts: 1,561
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Re: Anyone know what this is out of.
It wasn`t just cheaper machines - my HMV 3030 console only has a neon record level indicator and I doubt that it was at all cheap back in 1957.
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5th Aug 2020, 10:36 am | #10 |
Octode
Join Date: Mar 2006
Location: Lund, Sweden
Posts: 1,632
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Re: Anyone know what this is out of.
I always associate neon lamp level indicators with North American machines, and I can't recall seeing any continental or Scandinavian machines with one. Where they more prominent in the UK back in the day?
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5th Aug 2020, 12:23 pm | #11 |
Dekatron
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,224
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Re: Anyone know what this is out of?
It's ironic that the only magnetic recorder I own with a neon lamp as the level indicator is an Agaphone wire recorder from ... you guessed it ... Sweden.
I was reading a 1960's Practical Wireless magazine last night and it had an article on recording level indicators. It gave an example circuit using the EM84 valve, one using a single neon, and one with 2 neons (correct level and distorting). So I guess they were not unheard-of in the UK. |
5th Aug 2020, 1:25 pm | #12 |
Dekatron
Join Date: Jan 2005
Location: Oxford, UK.
Posts: 17,865
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Re: Anyone know what this is out of?
The only one I've seen with a neon was a cheap and cheerful British Portadyne machine, presumably mid-1960s, with a TD2 deck.
Very simple, but surprisingly effective. |
5th Aug 2020, 2:20 pm | #13 | |
Octode
Join Date: Sep 2017
Location: Bristol, UK.
Posts: 1,659
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Re: Anyone know what this is out of?
Quote:
Mike |
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