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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment.

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Old 20th Sep 2021, 2:33 pm   #21
Herald1360
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Default Re: Record player ID and repair.

Quote:
Originally Posted by Restoration73 View Post
I'm not sure that "logic" is a concept always associated with manufacture. It seems
senseless to use an ac/dc amplifier design with turntables that can only run on ac.
Cost is the logic here. Isolating transformers are dearer than an extra tapping on a motor winding that has to be there anyway or a dropper resistor.
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Old 20th Sep 2021, 4:56 pm   #22
david freeman
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Default Re: Record player ID and repair.

I agree with Edward. My first thought on seeing the photo was that this is an early Fidelity player for exactly the reasons he has already stated.
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Old 20th Sep 2021, 6:39 pm   #23
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Default Re: Record player ID and repair.

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There never was a UF86, it would have made a nonsense of the low hum heater concept so one couldn't be specified and a UF89 had to do.
Surprisingly a UF86 was made as this Mullard price list shows. I have never seen one in the flesh. J.
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Old 20th Sep 2021, 6:42 pm   #24
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Default Re: Record player ID and repair.

https://frank.pocnet.net/sheets/129/u/UF86.pdf

Lawrence.
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Old 20th Sep 2021, 6:50 pm   #25
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Default Re: Record player ID and repair.



Engage brain before posting!

I was thinking of 40 or 50V heaters rather than a modest 12.6V but the EF86 is only a 200mA heater.

I guess the five bob saving was the deciding factor.
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Old 21st Sep 2021, 5:54 pm   #26
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Default Re: Record player ID and repair.

Oddly a guy is selling some valves in the wanted section and one of them is a UF86! Tales of the Unexpected signature tune spins in my head.. J.
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Old 30th Sep 2021, 11:30 am   #27
JimFromSurrey
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Default Re: Record player ID and repair.

sorry guys, pressure of work and life took me away for a few days ... looks like it's all been going on in my absence!

I've had a quick look but i can't see any easy way to get under the 'hump' which i presume hides the valves etc, I can't see my obvious fasteners and don't want to force it...

Does anyone know how to get into it? excuse my ignorance if it's something simple I've missed!

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Old 30th Sep 2021, 11:36 am   #28
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Default Re: Record player ID and repair.

Do I spy three screws along the top of the hump?
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Old 30th Sep 2021, 12:46 pm   #29
Michael Maurice
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Default Re: Record player ID and repair.

Quote:
Originally Posted by Restoration73 View Post
I'm not sure that "logic" is a concept always associated with manufacture. It seems
senseless to use an ac/dc amplifier design with turntables that can only run on ac.
One manufacturer did make a record player specifically for use for both AC & DC mains using two sets of UL valves one set used as an inverter to power the motor.
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Old 1st Oct 2021, 11:10 am   #30
Herald1360
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Default Re: Record player ID and repair.

This has been mentioned before:
https://www.vintage-radio.net/forum/...58&postcount=7
Anyone know the make/model?
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Old 1st Oct 2021, 11:25 am   #31
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Default Re: Record player ID and repair.

Back on topic please.

Can anyone advise the OP as to how to gain access to the valves?
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Old 1st Oct 2021, 11:43 am   #32
Restoration73
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Default Re: Record player ID and repair.

Remove the 3 screws - the rexine coating of the cover may have stuck after a long
period, so use a spray oil along the edges and allow to penetrate.

Using a screwdriver, if you insert it where the mains cable enters at rear, gently force up
the cover panel.
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