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1983 Philips 26CS3890/05R Teletext & Printer
MRG Systems ATP600 Databridge
Teletext Editing Terminal
Microvitec Monitor 1451MS4
BBC Microcomputer TELETEXT Project
Viewdata, Prestel, Philips
Philips Model Identification
1976/77 Rank Arena AC6333 – Worlds First Teletext Receiver
PYE 1980s Brochure
Ceefax (Teletext) Turns 50
Philips 1980s KT3 – K30 Range Brochure
Zanussi Television Brochure 1982
Ferguson Videostar Review
She soon put that down
1983 Sanyo Brochure
Wireless World Teletext Decoder
Unitra Brochure
Rediffusion CITAC (MK4A)
Thorn TRUMPS 2
Grundig Brochure 1984
The Obscure and missing Continental
G11 Television 1978 – 1980
Reditune
Hitachi VIP201P C.E.D Player
Thorn 3D01 – VHD VideoDisc Player
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
Suggestions
Website Refresh
Colour TV Brochures
1970s Lounge Recreation
CrustyTV Vintage Television Museum
Linda Lovelace Experience
Humbars on a Sony KV2702
1972 Ultra 6713
Workshop Thorn Rentals CRT tester/rejuvenator kit.

Wonder if there is anyone else over here that remembers the Thorn CRT tester/rejuvenator self build kit? Back in the delta gun days, sets were often mistakenly being brought in by field engineers, for soft CRTs. When in fact it was often the tripler at fault, especially those blue German skeleton ladder types (example below) used in the 3000/3500.
Every field engineer was given an afternoon on the bench to build their own from a kit to carry out an emission test and rejuvenate both colour and mono CRTs. Does anyone still have an example or the kit instructions, I wonder? One did appear on eBay some years ago. Don't remember much about the design other than it used a BDX32 which was used as line output in the 8500.
John.

Hi John, sounds very intriguing, it would be good to see the circuit.
If one could be sourced, it might even be fun to build it, more so for those without a tester. They'd have a way to check emissions and have the ability to tickle their cathodes, without the need to fork out for a B&K et al.
What did it use as an indicator for emission, was it just a simple hook-up to your meter?
Were there any protection circuits to ensure the overzealous field tech did not strip the cathode bare?
There was a simple emission checker cct in Jan 1979 'Television', no ability to tickle.
https://www.radios-tv.co.uk/vintage-electronics-blog-forum/build-a-simple-crt-tester/
CrustyTV Television Shop: Take a virtual tour
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Our local RR had a B&K 467, which a tame engineer would "borrow" for us occasionally.

Hi Chris, fairly basic and certainly compact but a bit better than the Video Circuits model which was around at the time. Originally it was only possible to use with mono and delta CRTs but later the mono base was removed and the connector for the RCA PIL tube used in the 9000 was fitted. With the advent of other CRTs such as the AX51 and 30AX the workshop unit was replaced with the B&K467.
John.


I was hoping you may have had a copy. It will be interesting to see that document again, cheers👍
John.

Jim has scanned the Thorn manual for the tester, and submitted it via the upload service. 👍 I've just this second moved it to the data library. It can be found under 'test equipment', there is a Thorn folder.
CrustyTV Television Shop: Take a virtual tour
Crusty's TV/VCR Collection: View my collection

Thanks for that Jim, not quite as simple as I remembered but I was correct about the BDX32. Forgot about the emission test time limit also and I noticed it was Pat Pending, wonder if one was ever obtained?
John.


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