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Old 14th Nov 2017, 4:02 pm   #1
Radio Tech
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Default Murphy A122

So here is another project I have landed myself to do, and on initial inspection the dial cord broken and off, all the rubber covered wiring needs replacement, one or two dial lamps u/s, electrolytic capacitors look as if they have been replaced at some stage as one marked radio spares, the other too small for the chassis mount clip, all wax caps (axial ones) will need replacement and most likely leaking electrically like the electrolytic ones, one knob not matching the other three, rectifier looks as if it has had a hard time as covering scorched but all the valves test ok and clearing the usual amount of dust revealed that the paint work on the chassis is like it was in 1944. Here are some pictures of the chassis.

More to follow

Ken
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Old 14th Nov 2017, 4:20 pm   #2
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Default Re: Murphy A122

Hi Ken.

What is the red metalised valve fitted in the rectifier position? Not the UU6 that is usually fitted.
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Old 14th Nov 2017, 4:27 pm   #3
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Default Re: Murphy A122

http://www.r-type.org/exhib/aad0243.htm

?

Lawrence.
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Old 14th Nov 2017, 4:38 pm   #4
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Default Re: Murphy A122

Thanks Lawrence, ' never seen a metalised UU6.
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Old 14th Nov 2017, 4:52 pm   #5
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Default Re: Murphy A122

A set well worth getting going by repair, rather than restoration keeping the history of its life. IMHO the cabinet is worth getting looking brand new, no stain, let the wood shine through, Murphy did make a very good cabinet with style.

They where very modern in design and you may get away with it in a contemporary room, call it the iWood.
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Old 14th Nov 2017, 5:33 pm   #6
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Default Re: Murphy A122

There were quite a few UU series valves that were metallised, and later ones weren't, perhaps they found out that it was unnecessary and fell of anyway.
Looked pretty though.
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Old 14th Nov 2017, 5:57 pm   #7
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Default Re: Murphy A122

Hi Ken,

Deja vu. That looks almost in exactly the same state as one I had a few years back.

PS. I'm sure Mike Lewis had some A122 etc knobs in his black knob box at the last Harpenden.

Andrew
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Old 14th Nov 2017, 6:00 pm   #8
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Default Re: Murphy A122

Thanks for the input fellow members, it will be a little while before it is looking like it should, and yes, Murphy strange as it is did make very good cabinets, pressing on, more to follow.

Best wishes

Ken
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Old 14th Nov 2017, 6:30 pm   #9
David G4EBT
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Default Re: Murphy A122

Quote:
Originally Posted by merlinmaxwell View Post
A set well worth getting going by repair, rather than restoration keeping the history of its life. IMHO the cabinet is worth getting looking brand new, no stain, let the wood shine through, Murphy did make a very good cabinet with style.

They where very modern in design and you may get away with it in a contemporary room, call it the iWood.
The cabinets weren't actually designed or made by Murphy, but by R.D. Mills and Eden Minns.

In 1930 Gordon Russell – a furniture designer whose business was suffering due to the depression - received a call from Frank Murphy who said “ I am an engineer making radio sets and for some time have admired your furniture – would you like to design and make cabinets for me?” Over the next ten years Dick Russell and Eden Minns designed over 70 radio sets, gramophones and televisions. By 1939 Gordon Russell’s employed close on 1,000 employees, the majority engaged in Murphy cabinet production in a newly built factory at Park Royal, London.

A lovely example of a Murphy baffle set here:

1930 – 1940:

http://www.gordonrusselldesignmuseum.org/six-decades/

Gordon Russell also led the team that designed and arranged the manufacture of 'CC41' utility furniture by firms all over Britain during and after the war years, much of which was of course urgently needed due to people being bombed out of house and home and having to set up home again.

http://www.gordonrusselldesignmuseum.org/six-decades/

The Gordon Russell Design Museum, opened in 2008, is located at Broadway Worcester, in the Cotswolds - where the 'Arts & Crafts' movement originated:

http://www.gordonrusselldesignmuseum...ordon-russell/

I recently mentioned an excellent free 85-page 'e-book' about the history of Murphy cabinet design from 1930 - 1950 and the role of R.D. Russell and Eden Minns - lots of excellent pictures from glass plates rescued from a skip at the Murphy factory in the nick of time. The Author of the book worked at Murphy and was involved in cabinet design with Russel, & Minns. Worth giving the link again:

http://www.*************************..._1930-1950.pdf

I can understand why so many enthuse about Murphy sets of that golden era.

Hope that's of interest.

In many ways, its rather a shame that it often tends only to be the electronics that arouses interest in radio restorations - cabinetry being considered by many as something of a chore.
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Old 14th Nov 2017, 7:49 pm   #10
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Default Re: Murphy A122

Quote:
cabinetry being considered by many as something of a chore
It is essential for household harmony (a wayleave may be granted for a specially good job too) and you get satisfaction from a whole job well done.
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Old 15th Nov 2017, 12:09 am   #11
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Default Re: Murphy A122

I also have an A122 but mine is the M version with a slightly different speaker fret.
If you need to compare any measurements it is fully working.
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Old 16th Nov 2017, 10:53 am   #12
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Default Re: Murphy A122

Many thanks for that very interesting article on the cabinet David, I never thought that a different company designed those cabinets for Murphy Radio. Just a little update on the progress so far, I have done quite a bit of the wiring replacement as and where I find the rubber insulation has gone hard and naturally falls of the conductor, most of it is around the mains transformer and power sections. Have now started on the capacitors. More to follow....

Ken
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Old 18th Nov 2017, 4:20 pm   #13
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Default Re: Murphy A122

Hello Fellow Enthusiast's

Here is an update on the restoration of this set, during the process of renewing some of the wiring I found the screened lead that ran from the volume control to the wafer switch had perished, oh dear, so it was a case of finding something suitable to do the job and as you see from the picture of the wafer assy it required a great deal of quiet and patients to get in there with a soldering iron! phew! But however, I did manage it and then got on with replacing the smoothing caps, I replace one with a dual 16uF and the other with a 10uF, just got to find a large rubber bung to blank the hole off. So have a look at these pictures.

Best wishes

Ken
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Old 21st Nov 2017, 8:12 pm   #14
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Default Re: Murphy A122

Hi Folks

Few of the last pictures of this set, now complete with exception to one control knob, I think Rob who sent the set down to me will be pleased it has now been restored and I will leave it up to you for your thoughts on the look of it now.

Best wishes

Ken
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Old 21st Nov 2017, 8:40 pm   #15
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Default Re: Murphy A122

Well Ken, you've really had your hands full with your A122. Certainly a great improvement in the end.
As you may have seen, I've just been involved with a A122 "repair services wanted" thread from Aberdeen. Thankfully Richard's A122 wasn't in too bad a nick. Fair bit of elbow grease was needed cleaning & polishing the cabinet, and thankfully the circuitry didn't need too much repair work.
That range of Mazda valved sets have lovely balanced multi-turn tuning, and the audio valves - HL41DD & Pen45 put lovely sound into the speaker with excellent tone & volume control.
If any one else gets the offer of owning or working on one - jump at the chance. One slight drawback is the sheer size & weight.

Regards, David
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Old 21st Nov 2017, 10:59 pm   #16
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Default Re: Murphy A122

For the "bung" why not just use the dead large can electrolytic that was replaced by a modern one?
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Old 21st Nov 2017, 11:46 pm   #17
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Default Re: Murphy A122

Thanks for all this usefull 122 info from everyone including Ken, David-Cabinet Design/ overall History and David S [but I don't think they are that big really]. Iv'e got two good ones, must check them out]. It's not hard to see why people get drawn into "Murphy Madness". There is an engaging combination of both the Britsh character and a willingness to embrace "Modernism" from the thirties onwards. Frank M's story would make a good film regardless of the product. Like J L Baird, he was forced out of his own Company

Dave W

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Old Yesterday, 11:17 am   #18
David Simpson
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Default Re: Murphy A122

Yes Dave, get your two out onto your bench(if its big enough) & give them an electronic cuddle. That range of sloping back Murphy's are a joy to behold. I had a U128, which has very similar circuitry, until quite recently, when I donated it to our local museum. As it had a close link to the late Bill Smith - of "Bill Smith Chronicles" & " Radio Bygones" fame, and who lived nearby. I've still got my Reece-Mace Type N Marine Rx, which again has the same Mazda valve line up. The quality of Murphy's cabinet veneering & the choice of Mazda based circuitry is the most superior of all the wooden domestic sets I've worked on. Good on yer - Ken & Dave - keep on giving Murphy's loads of tlc.

Regards, David
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