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Success Stories If you have successfully repaired or restored a piece of equipment, why not write up what you did and post details here. Particularly if it was interesting, unusual or challenging. PLEASE DO NOT POST REQUESTS FOR HELP HERE! |
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9th May 2020, 7:55 pm | #1 |
Hexode
Join Date: Feb 2008
Location: Wrexham, North Wales, UK.
Posts: 466
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Pye Twin-Triple
I'm really chuffed with this one. It is a 1930 Pye "Twin-Triple" B4D, with two RF stages, anode bend detector and output stage. It was in a very poorly state with several open circuit resistors, the intervalve tx primary burnt out and various other faults. I suspect some had tried to connect it to the mains. Unfortunately I wasn't able to replace the transformer with an original one, so I had to make a little Paxolin bracket to hold the slightly larger one I had in stock.
All the external wiring was badly perished and had to be replaced, and two of the valves were pretty well dead. The biggest puzzle was the complete refusal of the frame aerial to produce any sort of signal - a check with the Avo showed a short circuit - it turned out to be the trimmer on the tuning gang, the mica had cracked! Several resistors had to be replaced - these are old Pye wire-wounds with layers of cotton binding round them. I cut away the original and fitted modern components across the Paxolin strip, then re-bound them so as to look original. To my surprise, the moving iron speaker worked much better than I had expected, though adjustment is very ticklish - a fraction of a turn on the control rod can make a huge difference. The case was not too bad, but I took off the old varnish which was badly scratched in several places, and re-polished it. Anyway, here she is, once again in working order. I'm surprised how lively the response is, and how precise the tuning, especially on MW. I'm building a dedicated PSU for it which will fit in the original battery compartment. Last edited by kestrelmusic; 9th May 2020 at 8:05 pm. Reason: Incomplete |
27th May 2020, 10:54 pm | #2 |
Dekatron
Join Date: Apr 2005
Location: Bewdley, Worcestershire, UK.
Posts: 4,748
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Re: Pye Twin-Triple
An excellent restoration. Well done
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Phil Optimist [n]: One who is not in possession of the full facts |
28th May 2020, 9:07 am | #3 |
Dekatron
Join Date: Feb 2009
Location: Chesterfield, Derbyshire, UK.
Posts: 3,762
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Re: Pye Twin-Triple
Nice restoration ,I had of those they do work well , let us see the power supply when you decide to make it , Mick.
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28th May 2020, 7:55 pm | #4 |
Dekatron
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 13,998
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Re: Pye Twin-Triple
That's really rather nice - one of the classic Pye "Rising Sun" radios.
Good to hear it performs well; I love the chassis-layout with the valves in their own private compartments! [Interestingly, when post-WWII Pye tried to re-introduce a range of radios with their classic 'rising sun' motif, this was seen as a symbol of Japan and - understandably, considering public sentiment based on stories told by PoWs - these radios were rejected by British consumers, to the extent that Pye had to recall them from dealers and crush them]. |
28th May 2020, 10:17 pm | #5 |
Dekatron
Join Date: Apr 2005
Location: Bewdley, Worcestershire, UK.
Posts: 4,748
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Re: Pye Twin-Triple
There's a comprehensive thread from 2011 all about the Pye M78F here.
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Phil Optimist [n]: One who is not in possession of the full facts Last edited by Phil G4SPZ; 28th May 2020 at 10:18 pm. Reason: Typo |
29th May 2020, 3:04 pm | #6 |
Dekatron
Join Date: Jun 2009
Location: Staffordshire Moorlands, UK.
Posts: 5,271
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Re: Pye Twin-Triple
nice job and a few tricky faults sorted!
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Kevin |
19th Aug 2020, 3:33 am | #7 |
Pentode
Join Date: Jul 2011
Location: Mission Viejo, California, USA
Posts: 144
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Re: Pye Twin-Triple
Nice work, and a beautiful radio! What battery voltages does it use?
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18th Sep 2020, 9:37 pm | #8 |
Hexode
Join Date: Feb 2008
Location: Wrexham, North Wales, UK.
Posts: 466
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Re: Pye Twin-Triple
It uses 120V HT, 2V LT, 9V GB.
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