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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
Fisher vbs-7000/ Sanyo Vtc-9100 Betamax

God evening.
I have an old betamax vcr from Sanyo/Fisher , its the same giant machine, a very heavy tank :-), i have some issue in the picture, i hope you can spot the red horizontal stribes in the picture, does anyone know what that is? it´s only when i play a movie, i have seen this phenomenon before on other formats like older vhs
I hope someone know what that issue is and how i can fix it,
regards
Alex
Do you have any LW or MW broadcasting transmitters nearby?
The chroma as picked up by the heads is in-band for MW radio. Used to be a common problem in Sydney around the Parramatta River basin.
Also, I seem to recall there is an adjustment that nulls the track-to-track crosstalk which mainly affects the down-converted chroma.

OK, that's me out! I seem to remember there being a modification (at least in the UK) , to the little modulator can behind the door at the top rear to stop this sort of thing... adding a 1uF cap if memory serves... but it was a long time ago...
I remember seeing something very similar in a few Sharp branded machines from the late '80s. There was an excessive amount of gain somewhere in the video amplification path, on playback. In those machines, there were a couple of trimmer pots that could be adjusted. It reduced the video gain, and thus, the saturation on screen. It had the desired effect of removing 'Hanover bar' type of effect. The adjustment wasn't too critical, but critical enough, and there was always the temptation to ramp up the gain as far as possible before the effect became visible. The trouble was, not all recordings were recorded equally, so some played just fine, whilst others would show the effect.
The aim was to get the saturation 'off tape' to look something equal to that 'off-air'. It needed a few different recordings, a little time, and some patience - or alternatively, some expensive kit to set those levels as per factory.
The thing to remember is these machines used offset azimuth on the heads so that the track laid down by one head became the guard band for the other, thus allowing the crazy slow tape speeds and long recording times.
This works very well for the FM luminance signal but not so well for the down-converted chroma, which was recorded "AM" using the luminance signal as AC bias. Because it was lower in frequency, some of the A head signal would be picked up by the B head and vice versa.
VHS and Beta both use a nifty cancellation circuit to solve this issue. Yours might be broken or out of adjustment.
Philips VCRs used a larger azimuth offset and eschewed the chroma cancellation circuit.
Another thing that can cause a similar effect (more like ghost patches of colour) is if the tape has been erased and re-recorded. Complete erasure of the previous chroma signal sometimes doesn't happen. No problem with the luma, the capture effect of FM takes care of that.
I once had a Sony VHS VCR (always sounds like an oxymoron to me!) that would intermittently lose capstan servo lock on playback. Problem turned out to be remnant servo sync pulses (what do they call that track again??) from previous recordings. Lowering the gain in the servo head amp fixed this one.
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