Luxor 1975 Range
A Christmas Tale remembered
Mitsubishi PAL Decoder
Converge The RBM A823
Murphy Line Output Transformer Replacement
1977/78 22″ ITT CD662; CVC30-Series
1982 20″ ITT 80-90 Model (unknown)
Retro Tech 2025
Fabulous Finlandia; 1982 Granada C22XZ5
Tales of woe after the storms. (2007)
Live Aerial Mast
Total collapse
What Not To Do
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
Luxor 1975 Range
A Christmas Tale remembered
Mitsubishi PAL Decoder
Converge The RBM A823
Murphy Line Output Transformer Replacement
1977/78 22″ ITT CD662; CVC30-Series
1982 20″ ITT 80-90 Model (unknown)
Retro Tech 2025
Fabulous Finlandia; 1982 Granada C22XZ5
Tales of woe after the storms. (2007)
Live Aerial Mast
Total collapse
What Not To Do
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
Manufacturing your own PCB
I doubt if anyone would go to trouble of making a complex printed circuit board by using the old method of laying on pieces of crepe material on the grid pattern. sheet. Made sometime in the late eighties or early nineties a 405 sync and blanking board for a 405 line converter project. No CAD assistance.
Till Eulenspiegel.
I remember my colleagues at work doing just that though - and a step below that was the "Dalo" pen. Later on, when CAD packages and UV-sensitised boards became available a couple of friends made their boards using laser-printable OHP film, being careful not to accidentally produce a "Doppelganger*" and passing the film twice through the printer to get sufficient density.
*this was where you accidentally produced a mirror-image of the track layout.
Posted by: @cathovisorLater on, when CAD packages and UV-sensitised boards became available a couple of friends made their boards using laser-printable OHP film, being careful not to accidentally produce a "Doppelganger*" and passing the film twice through the printer to get sufficient density.
This is what we did on my GCSE electronics course in the early 90s, except that we used a plotter to create the transparency.
I understand the BBC digital 625 to 405 line converter PCB artwork was made in a similar manner.
Till Eulenspiegel.
@till It's a pity D&ED no longer exist to ask them, unless there's an issue of Eng Inf that mentions it: when they were the only show in town you could understand the BBC making all its own equipment. I think one of the last studios to use BBC Coded Equipment was TC5 in its last analogue refurbishment in 1986. It also had a digital video decoder and a digital vision mixer (called a "combiner") for the graphics area.
It was certainly using the BBC-designed analogue video DAs right up to its closure in 2011.
Many years ago I constructed the PW mag Tele-Tennis, lots of TTL ICs on several boards. They were drawn by hand with a Dalo pen and although not pretty they worked. later I tried those rub on pads and tracks but were a bit of a pain.
I'm currently working on a replacement field board for Chris's 4000 using the toner transfer method. I've not attempted this before but seems to be possible to produce good results. Unfortunately I don't have a laser printer but a work colleague is helping me out with this.
Posted by: @cathovisor..... being careful not to accidentally produce a "Doppelganger*" .
Something woke me at 3am the other day and that exact thing came to mind and that I needed to mirror the design 👍
Posted by: @jayceebeeMany years ago I constructed the PW mag Tele-Tennis, lots of TTL ICs on several boards. They were drawn by hand with a Dalo pen and although not pretty they worked. later I tried those rub on pads and tracks but were a bit of a pain.
*shudders* oh I remember the rub on pads and tracks! Took about 10 times as long to draw something out. I preferred the stencils but even then I'd just use it for the pads and still draw in the tracks by hand.
Posted by: @jayceebeeI'm currently working on a replacement field board for Chris's 4000 using the toner transfer method. I've not attempted this before but seems to be possible to produce good results. Unfortunately I don't have a laser printer but a work colleague is helping me out with this.
My Father in-law (ex-technology teacher) has had really good results with this. He doesn't even bother removing the toner from the copper afterwards apart from the actual solder pads. He's found takeaway menus seem to work best to print the toner onto first before transferring it to the copper clad board.
@wayned I’ve seen one technique using that involves magazine paper and nail varnish remover, no heat involved. It seems to give amazing results.
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