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PYE CT 72

 
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PYE CT 72

Post by PYE625 » Sat Jul 11, 2015 5:56 pm

Hi, after bringing home this wonderful set I have taken a few pictures as is.
It is a PYE CT72 with the 691 single standard chassis.
From what I can see, it appears untouched and original.
Attachments
rsz_img_1884.jpg
rsz_img_1878.jpg
rsz_img_1887.jpg
rsz_img_1879.jpg
rsz_img_1880.jpg
rsz_img_1881.jpg

 
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Re: PYE CT 72

Post by malcscott » Sat Jul 11, 2015 6:21 pm

Nice one !

 
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Re: PYE CT 72

Post by Cathovisor » Sat Jul 11, 2015 7:07 pm

:aad

Given the model number, a direct successor to the thumping great dual-standard sets - the CT70 and CT71 I'd imagine. I have to say, it's a very nice looking set indeed. Not just condition-wise, but stylistically.

 
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Re: PYE CT 72

Post by marc » Sat Jul 11, 2015 7:16 pm

What an absolute corker you've got yourself there Andrew ! :bba
Well done :aad

Marc.

 
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Re: PYE CT 72

Post by PYE625 » Sat Jul 11, 2015 7:37 pm

Thanks guys, I do feel a bit guilty....how can little me be owning such a lovely set?

I know the seller of the set had powered it up and had used a video to try it out.
So, I briefly did the same with a DVD player and modulator, tuned in and was astonished at what I saw.
Is it really true?? How can this be?
No doubt there are capacitors that are past their best, Callins for example, but look at the initial result...
I have made no adjustments other than tuning, brightness, colour and contrast.
Attachments
rsz_003_2.jpg

 
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Re: PYE CT 72

Post by nuvistor » Sat Jul 11, 2015 7:44 pm

I would be surprised to find Callins caps, they were fitted in the later versions. The CDA board looks in good condition as well, it was the later ones that failed.
Looks in fine condition and such a good picture.
I really liked this version.
Frank

 
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Re: PYE CT 72

Post by mark pirate » Sat Jul 11, 2015 8:07 pm

You have a cracking set there, it looks as good internally as it does externally, it has obviously had little use.
The picture looks great, a very good buy :qq1

 
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Re: PYE CT 72

Post by Cathovisor » Sat Jul 11, 2015 9:03 pm

<speechless>

 
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Re: PYE CT 72

Post by Katie Bush » Sat Jul 11, 2015 9:27 pm

Well.................!

That hasn't got a lot of miles on the clock!! It looks as though it was shipped out of the works, left to gather dust, then you bought it - you jammy little dodger! :aad

Those CDA valves show no sign of distress, nor does the panel.. I've seen those valves so full of "tea stains" that you couldn't see inside, and the panels burnt to toast, but perhaps one good give away is the wiring, especially fly lead plug ends, which tended to turn brown and go as hard as pot.. Even the yellow "ribbon/tape" to the CRT still has its three CD output leads safely ensconced within - these used to de-laminate, change colour, go gooey and allow the leads to hang loose.

One thing about this chassis, being the more modern tripler derived EHT, is that it always seemed less stressed in every sense of the word, as well as being to work on.. Also, being single standard, it was much less complex and lower component count.

Very nice set indeed..... Does it still possess its original CRT?

Marion

 
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Re: PYE CT 72

Post by slidertogrid » Sat Jul 11, 2015 9:43 pm

That's a very low mileage set! Original Mullard valves no heat staining on the glass... The panels with the red screen printing were miles better than the later green ones. The PCL84 bases didn't blacken the panel any where near as much as the later sets. Maybe that the ventilation was better on the early sets as well?
This is an early single standard for sure, the give away is the frame panel with the heatsink on top of it and the large glass delay line.
Amazing condition! Well done for bagging it!
One thing I would watch is that black focus control, they had a habit of catching fire. the later grey ones still melted but at least the plastic wasn't flammable. A TV shop in one of the villages near me had a reasonably major fire years back when they left one on unattended over the lunch break. Remember when shops shut for lunch!? :aag
:thumb
Rich.

 
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Re: PYE CT 72

Post by PYE625 » Sat Jul 11, 2015 10:56 pm

Hi,
I changed a small electrolytic on the frame board as it was swelling at the rubber end and leaking, all others seem fine.
Here are some more pics after a dusting out and a minor linearity adjustment.
First pic is the side flap removed and the convergence panel in the set-up position.
I have found a date of OCT 72 stamped inside the convergence side-cover.
Attachments
rsz_2001.jpg
rsz_1005.jpg
rsz_009.jpg
rsz_008.jpg
rsz_007.jpg
rsz_006.jpg
rsz_004.jpg
rsz_002.jpg
rsz_010.jpg

 
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Re: PYE CT 72

Post by Katie Bush » Sat Jul 11, 2015 11:21 pm

Well now,

That's right and proper spoiled my weekend - I'm jealous as hell now........ :bba

It just goes to show that there are a few genuine gems out there, still waiting to be found.. I'd still bet that hen's teeth are more numerous, though.. That CRT looks like the genuine original item to me, and the focus looks pin sharp - I swear I can see the line structure on the Benny Hill picture.. As for the convergence, It's absolutely A1 - probably better than most that came and went through many a workshop.

Well done on such an excellent find. :aad

Marion

 
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Re: PYE CT 72

Post by Cathovisor » Sat Jul 11, 2015 11:21 pm

Not only do I remember when shops shut for lunch, but I can remember finding bits of a set remarkably like this on the local tip in the late 70s/early 80s - to wit, the line/EHT tower and the decoder - I recognise that delay line...

The colour on the Benny Hill picture looks spot-on for a '70s set too.

 
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Re: PYE CT 72

Post by PYE625 » Sat Jul 11, 2015 11:32 pm

Sorry Marion...I do feel guilty lol

Well, one things for sure, I will only use this set on high days and holidays and will take great care of it.
Clearly, it could barely have been used over it's long life.

The seller of the set deals with house-clearances and this set came from an elderly gentleman who had passed away.

 
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Re: PYE CT 72

Post by Katie Bush » Sat Jul 11, 2015 11:40 pm

Hi Andrew,

I'll get over it. :zx:

You just take care of, and enjoy, that set.. When you said it was from the home of an old gent who had passed away, I can't help but think how sad that is, and yet how fitting that his old telly should live on.

I can guarantee you this much, you can search from now until doomsday, and I'll bet you'll never find another in as good condition.. That is a true gem. :)

Marion

 
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Re: PYE CT 72

Post by Cathovisor » Sun Jul 12, 2015 12:08 am

Rather like the 11,000 recorded miles 1981 Datsun Sunny estate on eBay at the moment that looks like it was only used for church on Sundays, this set looks like it was only used for Songs Of Praise :qq1

 
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Re: PYE CT 72

Post by colourmaster » Sun Jul 12, 2015 8:47 am

Hi
What a beauty, I've never seen a picture on a pye hybrid as good as that ever .
The green label tube is the same type as my G6 has fitted and it still has great emission.
In my opinion those early pyes were so much better than the later ones .
Regards.
Gary.

 
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Re: PYE CT 72

Post by malcscott » Sun Jul 12, 2015 9:43 am

The green label on the crt indicates it is one of the first generation A56-120X, Malc.

 
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Re: PYE CT 72

Post by Briancuff » Sun Jul 12, 2015 10:19 am

HUH! What's the point of buying a set which works "out of the box" :aao ? Surely, you would rather swop it for an example I have here which needs a mountain of work on both cabinet and chassis (what fun) and probably will need a new CRT :qq1 :qq1 :qq1 .
Seriously, what a real spot of luck - a real museum quality example.

 
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Re: PYE CT 72

Post by jayceebee » Sun Jul 12, 2015 11:11 am

Come on Andrew, pull the other one.

You've obviously mastered the flux capacitor and what did you use to provide the 1.21 Gigawatts for each journey? :aak

Magnificent, what a superb find.

John.

 
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Re: PYE CT 72

Post by PYE625 » Sun Jul 12, 2015 11:56 am

Lol, well it was too good to last....
Line hold has become weak and twitchy with slight bending at the top plus the hold control has to altered on channel change with a hard to lock picture. I tried a new PCF802 with no difference.
It looks like some proper fault-finding is now required and I will start to check the oscillator circuitry around the discriminator diodes and PCF802 voltages etc.
Let the fun commence....
Attachments
rsz_1002.jpg

 
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Re: PYE CT 72

Post by peter scott » Sun Jul 12, 2015 12:28 pm

Hi Andrew,

You do realise that old tellies are just like cars and crave your attentions. That really was a superb picture but I think the set was just wanting you to spend few more days iterating out the final fraction of a millimetre of perfect convergence and decided to throw a tantrum!

Peter ttt:

 
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Re: PYE CT 72

Post by PYE625 » Sun Jul 12, 2015 12:38 pm

Ha ha, me thinks so too Peter.
I made a silly mistake over the date, what I thought was OCT 72 is in fact the model number CT72 stamped on the convergence cover !!
It would appear to be earlier as the date FEB 69 is on two CCL caps. One on the CDA, the other in the line stage pictured below.
Time for a good inspection of the components in that stage....a resistor across the linearity coil looks over-heated.
Attachments
rsz_1001.jpg
rsz_002.jpg
rsz_003.jpg
rsz_004.jpg
rsz_1005.jpg

 
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Re: PYE CT 72

Post by nuvistor » Sun Jul 12, 2015 12:40 pm

just looked in the library and a suggestion is check R35 and R38 on the IF panel.

edit. the resistor across the line coil did give trouble and caused striations down the left of the picture.
Last edited by nuvistor on Sun Jul 12, 2015 12:42 pm, edited 1 time in total.

 
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Re: PYE CT 72

Post by PYE625 » Sun Jul 12, 2015 12:41 pm

Cool, thanks Nuvistor...I will check them too :aad

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