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Forum 141

Bush TV12AM

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Spot-Wobble
(@spot-wobble)
Posts: 735
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Topic starter
 

I came across a TV12 AM for sale.
It looked as though it was a TV22 because the CRT mask is the same as the TV22.
See below.
Apparently the TV12 used an electrostatically focused tube which required the focus to be adjusted periodically when the set was used due to component tolerances .
The use of a magnetically focused tube resolved the problem.
What seems strange is that the TV12 AM was a TRF receiver, Superhet technology had been around for a while by this time so why design a set around TRF?
Check out the following link -

http://www.friendsreunited.co.uk/televi ... 01013b56c9

Andy

 
Posted : 07/01/2013 10:15 pm
Brian Cuff
(@briancuff)
Posts: 2063
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I saw a TV12 advertised a short time ago and noticed that it had the TV22 mask (4 x 3) instead of the normal 5 x 4 mask. I wonder whether this is the one I saw! Checking on Jon's excellent website, the TV12AM was manufatured as late as March 1950, the year in which the aspect ratio changed. He also mentioned the the TV12AM had a different main chassis so was obviously a much closer relative to the TV22 than the earlier TV12s. So the only accurate check for the TV12 is the RF deck with its red EF50s (a site which I love to see, all those red cans!).

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Posted : 07/01/2013 10:28 pm
TVJON74
(@tvjon74)
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I think there was an overlap in manufacture of the TV12 and the TV22.
I have a TV12AM, but the back panel is stamped with TV22, but with a badge stuck over the top with TV12AM on it.?
Also was there ever a TV12BM?? On jons page it states that 'B' was Birmingham model.

Jon

Jon
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Posted : 07/01/2013 10:37 pm
Spot-Wobble
(@spot-wobble)
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Jon,

The one I saw had another badge stuck over the one stamped on the back.
The RF deck has EF50s.
I would rather like it but funds are rather stretched at the moment.
It is on Ebay

Andy

 
Posted : 07/01/2013 10:54 pm
TVJON74
(@tvjon74)
Posts: 680
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Yes that sounds the same as my set.
Am I right on thinking that the AM version is magnetically focused with a lever like the TV22 and the TV12 had electromagnetic focusing with a pot for adjustment??

Jon

Jon
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Posted : 07/01/2013 11:27 pm
Spot-Wobble
(@spot-wobble)
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It would appear so from the photograph of the back of the set.

Andy

 
Posted : 08/01/2013 6:34 pm
freya
(@freya)
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There is a TV12AM on ebay at present, but at 125 pounds its a bit steep. It has the EF50 valves. I wont put the link as its very easy to search.

Stephen

 
Posted : 08/01/2013 6:50 pm
Spot-Wobble
(@spot-wobble)
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Hi freya,

That is the one I saw!
If I lived close by I may have been interested even at that price.
As I am too far away it will have to go elsewhere.
I still after a TV12 though.

Andy

 
Posted : 08/01/2013 6:58 pm
crustytv
(@crustytv)
Posts: 11869
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There is a TV12AM on ebay at present, but at 125 pounds its a bit steep.
Stephen

A while ago that would have been considered a bargain. Both mine cost way more than that and I mean way more! It was back when the market was less depressed and they were commonly fetching £300-400. Oh how times change. :O

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Posted : 08/01/2013 7:16 pm
TVJON74
(@tvjon74)
Posts: 680
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I think I paid £102 for about 18 months ago.
I haven't done anything with it yet as I can't get the screws out that hold the chassis into the cabinet!

Jon

Jon
BVWS Member

 
Posted : 08/01/2013 7:23 pm
sideband
(@sideband)
Posts: 4216
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There is a TV12AM on ebay at present, but at 125 pounds its a bit steep. It has the EF50 valves. I wont put the link as its very easy to search.

Stephen

Thank you Stephen. Please put any eBay links in 'Suppliers and Sources' only as this is for members only and affords a degree of privacy on discussions without making them public.

Rich

 
Posted : 08/01/2013 7:37 pm
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