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Pye 40f

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(@the_teleman)
Posts: 280
Reputable Member Registered
Topic starter
 

Had a real go at the 40f today replacing capacitors and resistors by the score 

after replacing the above I had to replace the line output transformer due to poor insulation and arcing luckily I had a new old stock transformer purchased many years ago in anticipation of finding a set 

when I first got the set on I had a strange frame fault bottom cramped and centre almost doubled over , the fault was finally traced to the thermistor on the scan coils , I’ve had this fault many times on pye sets but today I had a senior moment and forgot about this thermistor 

the set now running with full frame I had a video fault due to a faulty contrast control  it’s one of those typical pye controls with the kind passed through the pcb and a paxolin wiper I didn’t have a replacement so used an ordinary 10k control as a temporary measure and now the set is running well on both systems .

IMG 3012
IMG 3013

 

 
Posted : 03/08/2023 10:22 pm
(@nuvistor)
Posts: 4679
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@the_teleman 

Thats a nice result, pity the LOPTX died.

Those controls very often got damaged by the customer knocking the knob. I carried a stock of various sizes complete with knobs, circlip and wiper assembly on the van.

 
Posted : 04/08/2023 6:56 am
(@sideband)
Posts: 4268
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I think I found a box of those pots the other day when I was having a sort-out. Was it the type that came as a 'kit' where you had the track, wiper/knob and a circlip in a bag and you had to assemble it?

 
Posted : 04/08/2023 1:27 pm
(@the_teleman)
Posts: 280
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Topic starter
 

@sideband yes that’s the type 

the one I need is a 10k ohm

but I suppose a higher value would do it doesn’t look to be that critical in the manual 

 
Posted : 05/08/2023 10:03 am
(@sideband)
Posts: 4268
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I'll sort out a few and put them in the post. They came from a workshop clear-out some years ago. They must have had problems with those pots as they are all 10K!

 
Posted : 05/08/2023 11:21 am
(@sideband)
Posts: 4268
Famed Member Moderator
 

Posted by: @the_teleman

@sideband yes that’s the type 

the one I need is a 10k ohm

but I suppose a higher value would do it doesn’t look to be that critical in the manual 

 

I found a couple of those 10k pots. The original plastic bag used in the packaging seems to have degraded but I've checked and both kits are complete with the knob/wiper, track and circlip. I've put them in another bag so if you PM me your address, I'll put them in the post.

 

 
Posted : 08/08/2023 7:45 pm
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