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Thorn 1500 VT10 type TVT 7

 
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Thorn 1500 VT10 type TVT 7

Post by Focus 2 » Wed Jun 08, 2016 11:12 am

Anyone know a suitable replacement for the above? The Radio & TV Servicing info gives suitable replacement types for all diodes and transistors bar this one. It's used as the flywheel DC amp and is a NPN type.

Cheers,
Brian

 
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Re: Thorn 1500 VT10 type TVT 7

Post by crustytv » Wed Jun 08, 2016 11:29 am

Easy, TVT7 was Thorns internal component Id naming system, the transistor in question was a BC117. Quite why Thorn did this alternative naming is beyond me, it just introduced another layer of unnecessary complexity.

Anyway that's history, if you don't have any BC117 you can use a BF257 or a BF297

Edit: I'm working on a page for the main website that will help folk decode all Thorns internal Id's for components. I'll extend the scope of the document to include earlier B&W chassis.
http://www.radios-tv.co.uk/brcthorn-component-guide/

 
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Re: Thorn 1500 VT10 type TVT 7

Post by Till Eulenspiegel » Wed Jun 08, 2016 11:45 am

The BC117 is a high voltage transistor, a suggested replacement is the BF178.
Hi Brian, if you are needing a BC117 I might have one somewhere.

Till Eulenspiegel.

 
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Re: Thorn 1500 VT10 type TVT 7

Post by Focus 2 » Wed Jun 08, 2016 12:03 pm

That's brilliant, many thanks to you both!
Cheers
Brian

 
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Re: Thorn 1500 VT10 type TVT 7

Post by Cathovisor » Wed Jun 08, 2016 4:23 pm

CrustyTV wrote:Easy, TVT7 was Thorns internal component Id naming system, the transistor in question was a BC117. Quite why Thorn did this alternative naming is beyond me, it just introduced another layer of unnecessary complexity.

The idea was that any transistor designated as 'TVT7' by Thorn could be fitted in this position, regardless of the actual type number or manufacturer. The idea was it made it simpler for the dealer - you just said "I'd like 10 TVT7s, please" and you'd get whatever was the flavour of the month - or was available - with Thorn.

 
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Re: Thorn 1500 VT10 type TVT 7

Post by crustytv » Wed Jun 08, 2016 4:42 pm

you've solved a puzzle for me, I have a little filing cabinet full of Thorn components which are all in envelopes. At the top of the envelope is the Thorn code, some have card inserts. Now I know why under the code the packets contain so many different types.

I was finding it very confusing whilst trying to document the codes when some transistors/diodes were turning up all over the place.
:ccb

Thank You :thumb

env.jpg

 
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Re: Thorn 1500 VT10 type TVT 7

Post by Cathovisor » Wed Jun 08, 2016 4:49 pm

De rien :qq1


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