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Defiant TR1454 restoration
Topic Rating: +1 Topic Rating: +1 (1 votes) 
April 13, 2017
7:37 pm
VintageRob
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Evening all.

I thought I'd make my first post on this new forum.

So, here's my latest acquisition. A lovely little Defiant TR1454 TV from 1954.

 

Over the next few days/weeks I'm going to be documenting the progress of the restoration.

The first job was to remove the chassis. Nice and easy, just 4 bolts on the underside.

Oooooooo. It's bloomin filthy. I can only assume it was used in a coal fired house!

The tube was tested and it's got the dreaded partial heater short. A tap on the neck sorted that out temporarily, but it'll be changed for a spare. 

You can see how dirty it is in the picture of the removed tube.

Then I thought I'd spend a few hours sorting out the completely knackered dropper section. I've had a large selection of RS polos so i got to work.

To save on polos, I've simply replaced the tapped sections with a couple of resistors. I know it's not the done thing, but it'll never be used on any different AC supply now.

Anyway, that was today's fun.... more to follow as I get time to work on her.

Cheers for now.IMG_20170413_161327.jpgImage Enlarger

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April 13, 2017
8:04 pm
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PYE625
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VintageRob said

IMG_20170413_140627.jpgImage Enlarger

  

 Erm, yes perhaps the droppers are slightly beyond redemption   wink

Looks to be a very interesting restoration of a nice set welld_gif

Andrew.                                                                                   

                         

April 13, 2017
8:40 pm
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FordAnglia
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VintageRob said
I thought I'd make my first post on this new forum.

Greetings and Welcome!

To save on polos, I've simply replaced the tapped sections with a couple of resistors. I know it's not the done thing, but it'll never be used on any different AC supply now.

IMG_20170413_161327.jpgImage Enlarger

IMG_20170413_161320.jpgImage Enlarger

What is the red colour on the soldered joints? I've not seen that before, except perhaps in Military Spec. construction where solder joints are inspected by hand and 'tagged' with red lacquer as a QA marker.

Interesting project, from the outside PIX your TV looks in very good condition.

April 13, 2017
8:46 pm
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marc
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Hi Rob,

That's a sweet looking little set you have there. Looking forward to it's continuing story. thumb_gif

Marc. 

April 13, 2017
8:57 pm
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PYE625
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FordAnglia said

What is the red colour on the soldered joints? I've not seen that before, except perhaps in Military Spec. construction where solder joints are inspected by hand and 'tagged' with red lacquer as a QA marker.

Interestingly, I have seen the painting of solder joints on Plessey chassis and Kolster Brandes.

Andrew.                                                                                   

                         

April 13, 2017
9:04 pm
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Cathovisor
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This is something I know Rob does wink

To know yet to think that one does not know is best; not to know yet to think that one knows will lead to difficulty. Lao Tzu
April 13, 2017
9:49 pm
VintageRob
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FordAnglia said

VintageRob said
I thought I'd make my first post on this new forum.

Greetings and Welcome!

To save on polos, I've simply replaced the tapped sections with a couple of resistors. I know it's not the done thing, but it'll never be used on any different AC supply now.

IMG_20170413_161327.jpgImage Enlarger

IMG_20170413_161320.jpgImage Enlarger

What is the red colour on the soldered joints? I've not seen that before, except perhaps in Military Spec. construction where solder joints are inspected by hand and 'tagged' with red lacquer as a QA marker.

Interesting project, from the outside PIX your TV looks in very good condition.  

It's something we've done in the workshop for years. One of my engineers used to work for Marconi and it was done there so rings true with the military idea.

It's also handy if stuff comes back in some time after we've worked on the set. I use red varnish, Colin uses blue. We can then quickly work out who repaired that particular part of the set.

It's also easy to see what's been replaced at a glance, especially if we're doing a new cap in old can type of restoration.

It's simply nail polish!

April 13, 2017
10:44 pm
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Till Eulenspiegel
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Last year I chopped up a similar chassis for another project and the mains droppers were removed so if they can be found you are welcome to them.

In the early 1960s I repaired many of these excellent Plessey chassis sets, mostly Co-op Defiant branded models but there was also similar sets sold under the Marconi and Regentone brand names.   Defiant sets were always equipped with Mazda valves and CRT, Regentone sets have either Mullard or Mazda and the Marconi sets have Emitron or Marconi valves which were usually sourced from Mullard.

Till Eulenspiegel.

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