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
D|E|R Service “The Best”
The one that got away
Technical information
The Line Output Stage
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
D|E|R Service “The Best”
The one that got away
Technical information
The Line Output Stage
Grandstand SD070 on the Bench
I've recently bought a a couple of 70's pong machines, this one I got last Friday for £2.50 at a local boot fair. Got around to it today, I found a .022 cap that had split in half so replaced it. When powered up it works but I cannot tune it any better than you see in the picture. Anyone have any ideas what the cause of the poor picture might be. I'm guessing something in the on board modulator, nothing jumped out at me I suppose it could be a leaky cap, but they are mostly ceramic discs I don't have a schematic one would be of great help.
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Have you tried a different RF lead ?
Rob T
Hi Rob,
No as its fixed/soldered directly to the daughter board, on the main board.
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There is low gain somewhere. Check the RF output lead. They often had a hard time with kids pulling on them and breaking connections at either end. Make sure the TV you are using doesn't have a duff (low gain) tuner!
Otherwise if everything seems to check out OK, it looks like a modulator problem. Does it have a direct video output?
the problem is people used to wrap the cables around the console causing breaks in either the RF or power lead .
Ps would you like an Atari woody to add to your collection?
Rob t
Hi Rob,
thanks for the offer, I'm not really collecting these just saw a couple at a bargain price and decided on the spur to be a kid again.
The Binatone, is a dog. It wouldn't power up, upon investigation I found a transistor in the power line cracked in half. Found a generic replacement, it now powers up but seems to be stuck in a state with continuous blipping from the speaker. The Grandstand I've had more success with and its working fine. Turned out my 76 colour portable does not like the console. put it on another TV and its working fine.
I called my lad down (11) from playing on his Playstaion/Xbox, he's never seen pong games, I thought he would scoff at its naff-ness, he was hooked, we sat in the workshop playing for ages.
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... Turned out my 76 colour portable does not like the console. put it on another TV and its working fine ...
Chris, this might sound stupid but did you check the tuning? I imagine that the simple modulator chucks out lots of spurious signals and it's possible that you were trying to use one of them rather than the correct channel.
When all else fails, read the instructions
Step 0: Try leaving the console on for an hour, and see if there's any improvement. If so, that may be a clue. If not:
First step: fine tuning, if you've not already tried this.
Second: RF lead likely at fault. First, try replacing the Belling-Lee plug with a new one. Cut the lead back about 3cm from the entry point to the old one first. If unsuccessful, cut the lead back as far as you dare from the console entry point and fit a Belling-Lee connector - for preference a socket, so a straight plug to plug flylead can be used. If still no good, open the console and fit a new piece of mini co-axial cable the other end of which has a Belling-Lee connector, and arrange any further flylead you need.
There were a few games consoles that were poorly behaved on colour sets, and some colour ones that behaved badly on monochrome sets... however, if yours fails to perform acceptably on either, it is at fault.
"Yes, a bit of wet string may get you a good TV signal here on four channels, but you'll have to dry it out to get Channel 5!"
Posted by: @emleymoorStep 0: Try leaving the console on for an hour, and see if there's any improvement. If so, that may be a clue. If not:
First step: fine tuning, if you've not already tried this.
Thanks for your good intentions however, Errm... this thread is 6 years old!
I just moved this old thread to this section as I remembered it, and thought it was now best suited to being in here rather than the workshop forum. Also as I stated in the 6th post, (see quoted below) I found the fault and the console was working fine and still does to this day.
This is why some forums always lock old threads but I prefer to leave ours all open, it does sometimes result in confusion though if folk fail to notice dates. But as I said above and once again, thanks for your good intentions. ?
The Grandstand I've had more success with and its working fine. Turned out my 76 colour portable does not like the console. put it on another TV and its working fine.
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