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Pye 92 Rambler 169 Chassis. 17" Transportable

 
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Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Doz » Sun Nov 30, 2014 6:36 pm

After searching for a long time, one finally turned up!

This is the set that started it all for me. My first one cost me £1.50 in a church jumble sale back in 1984 ish... I was 13 at the time, and lugged it all the way home. My parents weren't that keen on me poking about with mains stuff, so it was whisked off to the local TV repair place (Siemen's TV of Carshalton) where £8.00 changed hands for the repair (a new valve I think)

Subsequently it went wrong again, but this time, I couldn't help but get the back off and have a look. With the help of a chap from the church who used to help out at Scouts and work for the BBC, a 47 Ohm polo was soldered across the dropper, and service was resumed!

The set ran up to the 1986 ish when the tube was too flat for the fun to continue. I binned it ....

Well, here we are, 30 years later....
20141130_163712 (Small).JPG

20141130_163913 (Mobile).JPG

20141130_163957 (Mobile).JPG

20141130_164022 (Mobile).JPG

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Doz » Sun Nov 30, 2014 6:39 pm

20141130_164031 (Mobile).JPG

20141130_164043 (Small) (Mobile).JPG

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Plenty of Callins to add to the excitement.... and evidence of a few previous repairs.

One thing surprises me. Why the Mazda CRT rather than a Mullard? It's probably it's original tube, as the previous one had the same CRT.

I've snipped the dodgy Dubilier across the mains, and left it on the variac with a few volts to soak and give the smoothing cap half a chance.

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by freya » Sun Nov 30, 2014 7:09 pm

Quite a mix of capacitor types on that chassis.

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by valvekits » Sun Nov 30, 2014 7:40 pm

The 169 chassis was another one of my favourites, it looks like some of the stock fault components have already been replaced. I think I spy an original 1.5k across the line lin coil which I believe was used for damping and sometimes needed replacing.
I don't remember seeing this chassis in a portable configuration though.
Looking forward to first light.

Eddie

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Doz » Sun Nov 30, 2014 7:53 pm

... and first light .... briefly.

Tube looks good. Plenty of snow. Tuner stuck solid. Then it all faded away and I've got a really hot dropper and the line stage has stopped.

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Doz » Sun Nov 30, 2014 9:28 pm

bugger....

20141130_202134 (Mobile).JPG
20141130_202125 (Mobile).JPG


That's two in one weekend... looks like my lucky loptx streak is at an end ...

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Doz » Tue Dec 02, 2014 2:25 pm

Would anyone care to hazard a guess as to which bit of the lopt has failed?

Just thinking if it's the EHT winding, I could just cut it off and slip something else on there .. (or just cut it off and ring the tx again to see if that is the fault, but I'm attempting not to destroy an otherwise OK EHT winding)

WSY?

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Lloyd » Tue Dec 02, 2014 7:32 pm

Does the LOPT come apart? I had loads of trouble with a Philips Style 70 LOPT, and on that you can undo 2 nuts and the whole thing comes apart, you can then remove the windings without damage, as the ferrite is in 2 pieces. I had fun swapping EHT windings about with that one! Talking of which, the EHT winding on yours looks similar to the one in that Philips...

Regards,
Lloyd.

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Focus Diode » Tue Dec 02, 2014 8:40 pm

Doz wrote:Why the Mazda CRT rather than a Mullard? It's probably it's original tube, as the previous one had the same CRT.


I know of an Invicta 26" 697 CTV with a Mazda CRT, 1cm larger than the Mullard equivalent thus were not interchangeable.

The 169 looks most interesting, I like the 691 number re-arranged, clearly from the same era with the mechanical 6-button tuner. Can't be that many around as I've never seen one before.
Sorry to hear of the Lopt. As Lloyd said it should come apart without damage to allow testing with the overwind removed.

Good luck and please keep us posted.
Cheers,
Brian

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Doz » Wed Dec 03, 2014 8:13 am

It's held together with a sort of wire clip. I'm sure the ferrite will be in two sections, but the join will be underneath each winding.

I'll have a go this evening.

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Doz » Wed Dec 03, 2014 7:40 pm

Lloyd wrote:Does the LOPT come apart?


.... Not without breaking it ....

Both the EHT winding and the others are bonded to the core.

I've tried cellulose thinners and acetone in an attempt to soften the glue. It won't. The plastic former will dissolve before the glue...

As you can see I have another (Philips) Lopt I was hoping to transfer the coils to, and use it's EHT winding, but as I cant get the one apart intact, a daren't wreck another lopt (even if I have no use for it, someone might)

20141203_183309 (Mobile).JPG

20141203_183327 (Mobile).JPG

20141203_183356 (Mobile).JPG

20141203_183338 (Mobile).JPG


This has been a bad end to a bad day. Gutted.

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by AidanLunn » Thu Dec 04, 2014 12:15 am

Couldn't you try and make something out of what you have cobbled together and use a tripler instead?

:aab

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Doz » Thu Dec 04, 2014 8:18 am

I don't have anything cobbled together.

The loptx with the blue winding is complete, but from a Philips set. I'm loath to break that one up, just incase I break it (likely as the glue is like cement, same as the existing tx)

I'm not able to get the good coils off the old loptx intact (although i could possibly drive the remaining ferrite out).

Stuck really. I wonder if it would take a jelly pot?

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by crustytv » Thu Dec 04, 2014 8:58 am

Hi Andy,

You've waited this long to find a Rambler, I would not be too hasty to modify it just yet.

One thing I've found to be true is no matter how rare you think something is to find, it will eventually turn up. Three examples of mine have already proved that. My Baird 8724 needed countless parts, the RGD 627 needed a LOPT which I thought was unobtainium it turned up after waiting 2 years. Also a 19" early colour CRT which was NOS.

Why not just put it on the shelf and give it some time and patience, its not going anywhere and it deserves to be kept original if possible. You only put out feelers for a LOPT this week, perhaps after a reasonable wait, then consider an alternative plan. Someone is bound to have a scrapper in their shed or one which has a duff CRT, etc etc who has not read the thread or wanted ad yet. Then these things often turn up on e-bay.

Just my opinion and of course its your set to do with as you please.

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Doz » Thu Dec 04, 2014 1:39 pm

I'm inclined to agree with you. I'll spirit it away into the attic and hope Santa brings me something wound ;)

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by hamid_1 » Thu Dec 04, 2014 11:55 pm

I feel your frustration. But there is hope, as Chris says.

Have you tried these people? http://markhindes.easywebstore.co.uk/

Your LOPT isn't listed on their website but it's worth contacting them to see if they have what you want - they've only put about 20% of their stock online.

Your Pye 169 LOPT has a part number: 3103 108 30082 - it's a Philips part, I believe. This may help someone else to find it - either the above company or another collector with a box of spare unknown LOPTs.

Also last year, forum member Colourstar gave away a 24" Invicta monochrome TV which had a good LOPT and a duff tube. I'm pretty sure it was a Pye 169 chassis. That means there is at least one other working LOPT out there ... Good luck in your quest!

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Doz » Fri Dec 05, 2014 8:25 am

Thanks Hamid.

I've asked the question. Looks like a good site to have a look around!

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Terrykc » Fri Dec 05, 2014 3:28 pm

It is a great pity that they have designed their site to display so few products on each page that you could lose the will to live while cranking (slowly) through it.

For example: British Valves. Page 1 of 62 ...

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by crustytv » Wed Feb 11, 2015 4:49 pm

Hi Andy,

Thought you might like to see this period ad, if you've not already.

rambler.jpg

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by malcscott » Wed Feb 11, 2015 5:22 pm

Should be easy enough to convert it to a Philips 210 loptx. More chance of finding one, Malc.

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by PYE625 » Wed Feb 11, 2015 7:39 pm

I am kicking myself, and regretting what I did during a big clear out two or three years ago.
I had two Pye 169 chassis sets, a 24 and a 20 inch. (Had horrible half-turn screws that never seemed to hold the backs on).
Both were in poor physical condition and with worn out tubes, but they worked.
I took them down the tip. :ccb

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Doz » Wed Feb 11, 2015 8:56 pm

Doz wrote:Thanks Hamid.

I've asked the question. Looks like a good site to have a look around!


Scoured the site, and emailed them, but never had a reply :(

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Doz » Wed Feb 11, 2015 8:58 pm

PYE625 wrote:I am kicking myself, and regretting what I did during a big clear out two or three years ago.
I had two Pye 169 chassis sets, a 24 and a 20 inch. (Had horrible half-turn screws that never seemed to hold the backs on).
Both were in poor physical condition and with worn out tubes, but they worked.
I took them down the tip. :ccb


Don't beat yourself up about it. One will turn up.

Thanks for the tip on the 210 loptx Malc, I may just put that up in a min.

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by PYE625 » Wed Feb 11, 2015 9:03 pm

Thanks, it's all too easy to look back at things that were chucked out and then regret it. :)

 
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Re: Pye 92 Rambler 169 Chassis. 17" Transportable

Post by Doz » Wed Jan 20, 2016 8:39 pm

Well, after a bit of a wait.... a very kind member (who wishes to remain anonymous) has found and sent me a very nice shiny Lopt, It's a Konig ZTR371 , which is apparently a replacement for the Philips 300 series single-standard sets. It has a stick rec molded into the overwind, so I can do away with the EHT rec.

I've got the circuit diagram for the 169, and the relevant bit of the circuit for the 300 from LLJ's article (no 214) , but I can't marry up the pins on the ZTR371 and the 300 diagram. Now I have the correct number of pins (minus 2, for the EHT Rec) but the value of the capacitors hanging off the pins vary a bit, as does the 1K resistor, presumably across the line lin control to give it a bit of damping (it's 1.5K), and don't appear to make much correlation to the pin labelling A-N (No I )) I also appear to have a pin, with a 150pF cap on it going to another pin with no winding connected to it. That maybe pin H, C5005. If that's the case, I'm not sure what the other cap is (which may be between pins J and G (22pF on the TX, 20pF on the diagram), but they aren't in alphabetical order.

Does anyone have a 300 to hand they can get a shot of the LOPT and/or print side of the timebase panel so I attempt to make some sense of it all? Or a 300 timebase panel they can lend me to look at?

I'd hate to cook a new lopt....

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