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

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Old 12th Feb 2018, 8:14 pm   #1
RojDW48
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Default Murphy A852G RP - service data (actually an A862G RP).

I can't find the data for this RP on the site - any pointers gratefully received. It goes but rather poorly and the tone controls do nothing at all.
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Old 12th Feb 2018, 8:30 pm   #2
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Default Re: Murphy A852G RP - service data

I cannot find any info but from photos of the chassis on eBay it appears to be a simple two stage audio amp with a valve rectifier.
Shouldn’t be too difficult to sort out.
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Old 12th Feb 2018, 9:00 pm   #3
ukcol
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Default Re: Murphy A852G RP - service data

What valves does your A852G use? The Murphy A851G (for which there is data available here) uses two ECL86s in push-pull and a metal rectifier.
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Old 13th Feb 2018, 8:37 pm   #4
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Default Re: Murphy A852G RP - service data

Thanks - it's a bit humbler than the A851G with A UY85 rectifier and a UCL82 output (2 stages in one valve?). Strange - with such similar model numbers. I revived an A851G some time ago and it was rather nice. I expect I can track down the usual suspect components from the pinouts but it would be reassuring to have a schematic. Pics attached - the fawn coloured, squareish components on the control panel are something I haven't seen before - capacitors? But no values visible.
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Old 13th Feb 2018, 9:31 pm   #5
Edward Huggins
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Default Re: Murphy A852G RP - service data

I suspect that this may be the Murphy "Majorette" from 1968. Rank-Bush-Murphy also made Bush and Dansette versions, just with different badges. But to confirm we need pics.
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Old 13th Feb 2018, 11:44 pm   #6
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Default Re: Murphy A852G RP - service data

The Murphy A862G uses a UCL82 and a UY85 like your A852G. The picture of the chassis in the Trader sheet for the A862G looks very much like your picture. The Trader sheet for the A862G is available here

http://www.service-data.com/section.php/5166/1/a862g

and in my opinion is certainly worth a punt.

EDIT: I have just noticed that the Trader sheet calls the A862G the "Majorette" which fits in with Edward's suggestion above.
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Last edited by ukcol; 13th Feb 2018 at 11:55 pm. Reason: Added sentence
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Old 14th Feb 2018, 12:51 am   #7
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Default Re: Murphy A852G RP - service data

Thank you very much Colin - that's the one - I probably mis-read the '6' as a 5 - my eyesight is not what it was . Interesting to know it was also marketed as a Bush - thanks, Edward.
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