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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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15th Sep 2015, 5:35 pm | #21 |
Octode
Join Date: Mar 2006
Location: Watford, Hertfordshire, UK.
Posts: 1,270
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Re: GEC Dual Standard Colour
Aquadag connection? Could be the PL509 Barkenhausen. The later ones had a conductive ring on the glass but with early ones we placed a grounded single turn of tinned copper wire around the glass and adjusted for minimum striations. Lol what days!
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Whether the Top Cap is Grid or Anode - touching it will give you a buzz either way! |
15th Sep 2015, 7:03 pm | #22 |
Hexode
Join Date: Jan 2007
Location: Beckenham, London, UK.
Posts: 373
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Re: GEC Dual Standard Colour
I have tried a couple of PL509s (both with rings). I'm going to order myself some ferrite beads and give that a go. Thanks for all the help.
Steve |
16th Sep 2015, 9:57 am | #23 |
Dekatron
Join Date: Jul 2008
Location: Charmouth, Dorset, UK.
Posts: 3,601
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Re: GEC Dual Standard Colour
This is a watery line down one side? I'm sure i found a cure for it but sadly still can't remember what it was.
Used to live not to far from you in Petts Wood. Peter |
17th Sep 2015, 4:40 pm | #24 |
Retired Dormant Member
Join Date: Feb 2008
Location: Croydon, London, UK.
Posts: 408
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Re: GEC Dual Standard Colour
If it is not the obvious 1.5K resistor across the line lin coil, I think it has something to do with the screening can and the top caps of the PL/PY.
A stray earth point? Just a thought. |
18th Sep 2015, 10:22 pm | #25 |
Hexode
Join Date: Jan 2007
Location: Beckenham, London, UK.
Posts: 373
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Re: GEC Dual Standard Colour
I've tried all the suggestions now, plus some ferrite beads and extra damping on the scan coils and lin coil- all to no avail. Given the service manuals comments on this issue I've come to the conclusion that most likely production tolerances on the LOPT in particular produces this fault on a number of sets.
Thanks for all the help. Steve P.S. Peter N.- Can we try hypnosis to get the secret out of you? (only joking!) |