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B&W TV PYE 12U

 
The_Teleman
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This set was acquired recently from a guy down south and kindly collected for me by David Newman for me to collect off him at Retrotech uk 

The set is a TV12 a plastic cabinet version of the 11U chassis and by the looks of it it’s the later version with separate preset contrast controls and a EF184 in place of the more common PCF80 in the V6 position 

on inspection the set appears to be very reasonable condition a few bits of cabinet damage here and there but nothing that can’t be sorted 

inside looks as reasonable as the outside with some damp damage I’ve various places but generally very good not like most of these chassis I’ve come across this one isn’t covered in the remains of the wax capacitors that have melted everywhere. 

The CRT was tested first to see if I need to find a replacement but this tested good , the VHF aerial socket was missing but that was soon replaced , the mains dropper has been bridged but only in one section so that will do for testing purposes as a replacement was kindly given by Chris (crusty) so when everything has been repaired this will be fitted 

I think the first steps now would be to replace all those horrible wax capacitors along with any electrolytics 

as can be seen by the photos the VHF tuner is a bit rusty so some time will be spent cleaning that up 

I’ll be posting the progress as and when I get time to spend on the set as life tends to get in the way at the moment but for now here are some photos

34AC9C53 FDD2 4A79 96F9 50D6A3F1F252
BF947EDD 32DC 4887 8D3B 9EC747ABB537
B4AD6503 C120 45FB 8E19 94B3AC287535
0F952F6E DE17 4050 A95F D6E0CD8D8EAE
C754EA17 0728 4F2B A270 E705E4B5ADA8
CFD1A88E 7F7B 4688 B4D8 1F8DE59AEF6D
E60FC730 D27A 47AE BA6F 7BB1FC2E5E64
12B7AA87 E7BC 4AB0 8086 5CCC2D17387E
729C48B9 0F23 477D AC98 CF18E638338D
C7235FA5 18AF 41D5 ADAA B3091BB47565
B4F19CD3 C665 46CF A2B7 41053926E19E
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Topic starter Posted : 20/05/2022 2:07 pm
malcscott, slidertogrid, Red_to_Black and 4 people liked
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Nuvistor
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@the_teleman 

I have forgotten many of the sets stock faults but these were bread and butter sets in the 1960’s for me, much better 625 performance than the earlier 11U but still had that valve UHF tuner that required a few millivolts at the top end of the band for noise free reception.

Had one as my set at home for 5 or 6 years in the 1970’s, the Ekco version, before we had a CTV.

 

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Posted : 20/05/2022 2:28 pm
19Seventie
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Ah! I wondered if you'd have got it!

I saw it too and wanted it but it was way too far for me. I debated having it delivered by pallet to me but decided against it due to the plastic cabinet. Didn't think it'd survive well at all. 

I'm sure it'll be up and running in no time, i can't wait to see it going

Good luck
'70

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Posted : 20/05/2022 10:59 pm
sideband
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One of my favourite sets! I have an 11U that's been in the family since new. There should be some extensive reports on the set in the VRAT archives. Mine has the more common PCF80 instead of the EF184. As stated above, these were bread and butter sets in the 60's and 70's. When I started in the trade in 1970, nearly every other TV coming in for service seemed to be a variant of one of these....not because they were unreliable....far from it but because there were so many about. Mine gets an airing a few times a month. After extensive restoration, it works very well. A dropper section failed on mine (heater) and I replaced it with a capacitive dropper which continues to give good service (and reduced the heat in the corner). 

Here's one thread on mine. There are others.....…and the Pye 11U bounces back yet again. – Black & White Television – VRAT Forum (radios-tv.co.uk)

 

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Posted : 21/05/2022 4:50 pm
The_Teleman
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Well, some success with the 12u

all the wax capacitors have been replaced together with the main smoothing capacitor and various other electrolytic capacitors 

the set now works well on both systems but not without some issues along the way, various resistors especially high value ones needed replacing but the main stumbling block was the loptx going into saturation 

this was successfully recovered by putting 15 volts through the overwind over a few days to drive out any damp. The set ran well for a few hours this morning until disaster struck 🤦‍♂️ The loptx just died 🤬so this looks like another job for Mr Barker.

That must be 3 of these that have gone down recently. As the saying goes you don’t get one for ages then 3 come along together. 

The photo shows the set working just before the loptx died, as you can see it was pretty good, so I think a rewind is justified.

565C34A0 3EFB 442C 889D 5993A79F65B3
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Topic starter Posted : 30/05/2022 2:09 pm
Nuvistor
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@the_teleman 

It does look excellent.

I never had a LOPTX fail in the chassis’s service life, but after going on 60 years that’s forgivable.

 

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Posted : 30/05/2022 2:23 pm
Lloyd
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Shame about the lopty, looked a damn good picture before it died!

 Regards 

Lloyd 

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Posted : 30/05/2022 5:25 pm
sideband
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If anyone can rewind it, Mike can! Worth getting it done. Mine still has the original LOPT from 1964 and I keep my fingers crossed each time I switch it on.....

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Posted : 30/05/2022 8:15 pm
The_Teleman
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@lloyd Thanks Lloyd , it was far better than the picture says so it’s definitely time for a rewind 

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Topic starter Posted : 31/05/2022 4:49 pm
The_Teleman
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@sideband 

im trying to put together the whole range of pye badged 11u series 

so far I have the TV3u , TV11u, TV12, TV13u, TV15,TV20

theres Still a few to go but it’s coming together nicely 

I have a bit of a soft spot for this chassis 

i also have Pam , Ekco & Dynatron versions but I prefer the pye sets 

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Topic starter Posted : 31/05/2022 4:59 pm
sideband
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@the_teleman 

These were easy sets to repair back in the day. I think there was a version that had a radio or record player in a large cabinet. 

Don't think I ever changed a lopt in the hundreds that I repaired.

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Posted : 31/05/2022 6:28 pm
The_Teleman
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@sideband 

yes there was it’s the pye trio model 28 I have one of those too 

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Topic starter Posted : 01/06/2022 7:57 pm
The_Teleman
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Well today I had a bit of good luck for a change 

I managed to find in my stock of transformers a used 11u loptx it looked tidy so with nothing to loose I fitted it in the 12u and it worked fine it didn’t even get warm so I might be ok with this one fingers crossed as can be seen both systems are absolutely spot on 

BDA26DEB E093 414C A18D C0417FF3D2BF
4DAE3639 B9CE 4815 9672 D2F90B5AE263

 

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Topic starter Posted : 01/06/2022 8:06 pm
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Nuvistor
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Was this a Pye design or in collaboration with Ekco, the chassis is different from earlier Pye or Ekco designs?

Either way it was a good one.

 

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Posted : 02/06/2022 8:23 am
The_Teleman
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@nuvistor I’m sure this was a pye design even though this chassis was used in Ekco , Pam, Invicta and Dynatron sets

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Topic starter Posted : 04/06/2022 11:35 am
sideband
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Posted by: @the_teleman

@sideband 

yes there was it’s the pye trio model 28 I have one of those too 

Coincidentally there is a Trio for sale on eBay at the moment but it's in the valve radio section.

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Posted : 04/06/2022 6:54 pm