Forum Free Registration Closed
Granada Television Brochure, 1970s
Long Gone UK TV Shops
Memories of a Derwent Field Service Engineer
PYE Australia Circa 1971
Radios-TV VRAT
Fabulous Fablon
Thorn TX10 Chassis
Crusty-TV Museum, Analogue TV Network
Philips N1500 Warning!
Rumbelows
Thorn EMI Advertising
Thorn’s Guide to Servicing a VCR
Ferguson 3V24 De-Robed
Want to tell us a story?
Video Circuits V15 – Tripler Tester
Thorn Chassis Guide
Remove Teletext Lines & VCR Problems
Ceefax (Teletext)
Suggestions
Website Refresh
Colour TV Brochures
1970s Lounge Recreation
CrustyTV Vintage Television Museum
Linda Lovelace Experience
Humbars on a Sony KV2702
1972 Ultra 6713
D|E|R Service “The Best”
The one that got away
Technical information
The Line Output Stage
The map
Tales of a newly qualified young engineer.
Tales of a Radio Rentals Van Boy
Sanyo SMD
Disastrous Company Rebranding
1969 Philips G22K511
Memories Of The TV Trade
Crazy house
Dirty TV screens
Dual Standard and Single Standard CTV’s
Radios-TV on YouTube
The Winter of 62/63
A domestic audio installation
1979 Ferguson Videostar Deluxe 3V16
Music centre modifications
Unusual record player modification
B&K 467 Adapters
Mishaps In The Trade
1971 Beovision 3200
Forum Free Registration Closed
Granada Television Brochure, 1970s
Long Gone UK TV Shops
Memories of a Derwent Field Service Engineer
PYE Australia Circa 1971
Radios-TV VRAT
Fabulous Fablon
Thorn TX10 Chassis
Crusty-TV Museum, Analogue TV Network
Philips N1500 Warning!
Rumbelows
Thorn EMI Advertising
Thorn’s Guide to Servicing a VCR
Ferguson 3V24 De-Robed
Want to tell us a story?
Video Circuits V15 – Tripler Tester
Thorn Chassis Guide
Remove Teletext Lines & VCR Problems
Ceefax (Teletext)
Suggestions
Website Refresh
Colour TV Brochures
1970s Lounge Recreation
CrustyTV Vintage Television Museum
Linda Lovelace Experience
Humbars on a Sony KV2702
1972 Ultra 6713
D|E|R Service “The Best”
The one that got away
Technical information
The Line Output Stage
The map
Tales of a newly qualified young engineer.
Tales of a Radio Rentals Van Boy
Sanyo SMD
Disastrous Company Rebranding
1969 Philips G22K511
Memories Of The TV Trade
Crazy house
Dirty TV screens
Dual Standard and Single Standard CTV’s
Radios-TV on YouTube
The Winter of 62/63
A domestic audio installation
1979 Ferguson Videostar Deluxe 3V16
Music centre modifications
Unusual record player modification
B&K 467 Adapters
Mishaps In The Trade
1971 Beovision 3200
Thorn 1500 VT10 type TVT 7
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
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.
https://www.radios-tv.co.uk/brcthorn-component-guide/
CrustyTV Television Shop: Take a virtual tour
Crusty's TV/VCR Collection: View my collection
Crustys Youtube Channel: My stuff
Crusty's 70s Lounge: Take a peek
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.
That's brilliant, many thanks to you both!
Cheers
Brian
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.
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.
Thank You
CrustyTV Television Shop: Take a virtual tour
Crusty's TV/VCR Collection: View my collection
Crustys Youtube Channel: My stuff
Crusty's 70s Lounge: Take a peek
De rien
- 33 Forums
- 7,942 Topics
- 116.3 K Posts
- 5 Online
- 331 Members