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

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Old 22nd Oct 2021, 9:41 pm   #21
Cobaltblue
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Default Re: Homebrew Record Player. BSR UA6 deck and RS Components. Stereo Amplifier.

Hi Ken

Yes I can see that the cable is not connected but it should be,

Can you show a picture of the backs of the volume and tone controls?

Cheers

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Old 22nd Oct 2021, 9:57 pm   #22
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Default Re: MONARCH BSR Black Box

Thanks Mike,

it is confusing to me, so I should connect the wire to that transformer that connect to the speaker , I think its only the wire that needs to be connected, so its the inner wire to the inner wire and the outer wire to the outer , I will do that and send you a picture before I solder it,

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Old 22nd Oct 2021, 9:59 pm   #23
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Default Re: Homebrew Record Player. BSR UA6 deck and RS Components. Stereo Amplifier.

OK I will.
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Old 22nd Oct 2021, 10:00 pm   #24
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Default Re: Homebrew Record Player. BSR UA6 deck and RS Components. Stereo Amplifier.

Hi Ken

Send pictures before you do anything.

Are you saying that the cable is for the speaker?

If that's the case I am surprised you were getting a hum.

It looked to me that the long cable was going to the cartridge connections on the record deck.

Cheers

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Old 22nd Oct 2021, 10:30 pm   #25
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Default Re: Homebrew Record Player. BSR UA6 deck and RS Components. Stereo Amplifier.

On that little mb, where the wire connects to the speaker, is that where I should connect the wire from the pick-up arm?
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Old 22nd Oct 2021, 10:33 pm   #26
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Default Re: Homebrew Record Player. BSR UA6 deck and RS Components. Stereo Amplifier.

No the cable from the arm is going nowhere at the moment the cable from that little MB is going to the speaker.
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Old 22nd Oct 2021, 10:59 pm   #27
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Default Re: Homebrew Record Player. BSR UA6 deck and RS Components. Stereo Amplifier.

Are there any connections on the underside of that MB?

David
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Old 22nd Oct 2021, 11:03 pm   #28
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Default Re: MONARCH BSR Black Box

See pictures
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Old 22nd Oct 2021, 11:07 pm   #29
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Default Re: Homebrew Record Player. BSR UA6 deck and RS Components. Stereo Amplifier.

I meant the underside of Photo 2, the side that you cannot see.

David
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Old 23rd Oct 2021, 7:32 am   #30
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Default Re: MONARCH BSR Black Box

Quote:
Originally Posted by Audio1950 View Post
Quote:
Originally Posted by Edward Huggins View Post
Even the BSR deck from 1955 is not the type that was ever used by Pye in any "Black Box".

I should know, I was there.....
Yet in your previous post (No. 2 above) you say the deck was used in early versions.
Yes, it sort of was, but it was a special version of the BSR UA6 made for Pye. It had an all-metal tone arm and a Pye badge added on a moulding at the rear of the arm. The version shown in the OP's photos was the standard UA6.
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Old 23rd Oct 2021, 7:46 am   #31
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I do not think Pye was mentioned by the OP, is Black Box specific only to Pye ?

David
Black Box was a generic term that came from use within the RAF during WW2 to designate a "special device", such as in-flight recorder. Also during the War Pye made a large number of special devices like IF strips (of EF50 fame) for the RAF. Therefore when Pye planned the launch of their new compact record player for home use in late 1953, they used the (familiar to them) name "Black Box". Indeed there was a Black version. Born of my Farther's WW2 avionics experience, and also my time at Pye in the 1950s, I hope this explanation helps.
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Old 23rd Oct 2021, 8:47 am   #32
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Default Re: Homebrew Record Player. BSR UA6 deck and RS Components. Stereo Amplifier.

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Originally Posted by DMcMahon View Post
I meant the underside of Photo 2, the side that you cannot see.

David
Isn't that the output transformer? You can see the mounting lug.

Perhaps there's something written on the insulation covering the wiring?
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Old 23rd Oct 2021, 8:52 am   #33
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Default Re: MONARCH BSR Black Box

Quote:
Originally Posted by Edward Huggins View Post
Quote:
Originally Posted by DMcMahon View Post
I do not think Pye was mentioned by the OP, is Black Box specific only to Pye ?

David
Black Box was a generic term that came from use within the RAF during WW2 to designate a "special device", such as in-flight recorder. Also during the War Pye made a large number of special devices like IF strips (of EF50 fame) for the RAF. Therefore when Pye planned the launch of their new compact record player for home use in late 1953, they used the (familiar to them) name "Black Box". Indeed there was a Black version. Born of my Farther's WW2 avionics experience, and also my time at Pye in the 1950s, I hope this explanation helps.
I think we've established the provenance of this record player. Can we get round to discussing its repair please.

Anyone care to draw up a diagram showing the interconnections between the various parts? Pickup/cartridge, volume and tone controls, amplifier, output transformer, filament transformer, rectifier, smoothing capacitor and another transformer, or perhaps a smoothing choke.
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Old 23rd Oct 2021, 10:32 am   #34
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Default Re: Homebrew Record Player. BSR UA6 deck and RS Components. Stereo Amplifier.

So far as I can make out the screened cable from the pickup should connect to the volume control (which looks to be the top control in the 1st photo in the last set of photo's) I would say the signal wire (the center lead of the screened cable) goes to the top tag (as viewed in the photo) and the screen (the outer copper braiding) goes to the bottom tag (as viewed in the photo)

Lawrence.

Last edited by ms660; 23rd Oct 2021 at 10:41 am. Reason: extra info
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Old 23rd Oct 2021, 10:41 am   #35
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Default Re: Homebrew Record Player. BSR UA6 deck and RS Components. Stereo Amplifier.

Quote:
Originally Posted by Station X View Post
Quote:
Originally Posted by DMcMahon View Post
I meant the underside of Photo 2, the side that you cannot see.

David
Isn't that the output transformer? You can see the mounting lug.

Perhaps there's something written on the insulation covering the wiring?
Yes that makes a lot of sense now, I thought it was some kind of terminal board.

David
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Old 23rd Oct 2021, 10:47 am   #36
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and another transformer, or perhaps a smoothing choke.
I thought it probably is a smoothing choke as it looks like it connects to the bridge rectifier.

David
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Old 23rd Oct 2021, 10:51 am   #37
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Default Re: Homebrew Record Player. BSR UA6 deck and RS Components. Stereo Amplifier.

There doesn't seem to be any way of turning the player OFF. The orange lawnmower? mains lead goes straight to the mains transformer and there are no connections to the double pole switch ganged with the volume control.
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Old 23rd Oct 2021, 10:57 am   #38
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Default Re: Homebrew Record Player. BSR UA6 deck and RS Components. Stereo Amplifier.

The use of the wording "Stereo Amplifier" may confuse some Members who may have missed parts of this lengthening Thread. There's just a Mono amp connected to an Elac elliptical speaker (now I can see it) but constructed on a Stereo amp PCB.
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Old 23rd Oct 2021, 12:42 pm   #39
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Default Re: MONARCH BSR Black Box

Quote:
Originally Posted by Edward Huggins View Post
Quote:
Originally Posted by DMcMahon View Post
I do not think Pye was mentioned by the OP, is Black Box specific only to Pye ?

David
Black Box was a generic term that came from use within the RAF during WW2 to designate a "special device", such as in-flight recorder. Also during the War Pye made a large number of special devices like IF strips (of EF50 fame) for the RAF. Therefore when Pye planned the launch of their new compact record player for home use in late 1953, they used the (familiar to them) name "Black Box". Indeed there was a Black version. Born of my Farther's WW2 avionics experience, and also my time at Pye in the 1950s, I hope this explanation helps.

Yes very helpful, I had to Google and read up on the EF50 very interesting.

David
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Old 23rd Oct 2021, 12:50 pm   #40
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Default Re: Homebrew Record Player. BSR UA6 deck and RS Components. Stereo Amplifier.

Quote:
Originally Posted by Station X View Post
There doesn't seem to be any way of turning the player OFF. The orange lawnmower? mains lead goes straight to the mains transformer and there are no connections to the double pole switch ganged with the volume control.
True the only way I can turn it off is by pulling out the mains plug.
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