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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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25th Jan 2022, 6:30 pm | #21 |
Heptode
Join Date: Jun 2006
Location: Eindhoven, Netherlands.
Posts: 640
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Re: Bush TV62/BK 465 CRT Tester
Andy,
Note that a PCF80 is 9V-300mA. Jac |
25th Jan 2022, 6:50 pm | #22 |
Hexode
Join Date: Apr 2008
Location: Perigord Noir, France
Posts: 352
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Re: Bush TV62/BK 465 CRT Tester
Jac,
Thanks, I do know, just didn't think at the time. To much going on. I wondered why the heater wasn't very bright! I will do a check with 6.3V valve. Andy |
25th Jan 2022, 11:16 pm | #23 |
Dekatron
Join Date: Sep 2006
Location: Kilmarnock, Ayrshire, UK.
Posts: 5,420
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Re: Bush TV62/BK 465 CRT Tester
Hi Andy.
Check the heater current on the full chain, I bet its well below 300ma. The thermistor could be faulty or just aged a common issue for low heaters.
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Cheers, Trevor. MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member |
25th Jan 2022, 11:18 pm | #24 |
Dekatron
Join Date: Sep 2006
Location: Kilmarnock, Ayrshire, UK.
Posts: 5,420
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Re: Bush TV62/BK 465 CRT Tester
No email or PM Andy. Or were you referring to someone else?
__________________
Cheers, Trevor. MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member |
30th Jan 2022, 4:41 pm | #25 |
Hexode
Join Date: Apr 2008
Location: Perigord Noir, France
Posts: 352
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Re: Bush TV62/BK 465 CRT Tester
TV62 Update,
I have made the mods suggested by Trevor - Thanks! So here are couple of pics, Still not as good contrast as my TV22, but then I shall check alignment once I have (hopefully finally replaced the last of the duff transistors in my 50Mhz Tektronix Scope). At the moment all I have is a 20MHz Telequipment scope. Although for a TV pretty much the same age as me, I think it is putting in a pretty good performance for its age! The horizontal line on one pic is due to the poor placing of the CRT heater transformer on my part. It's location will be moved very soon! Andy |
30th Jan 2022, 4:50 pm | #26 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
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Re: Bush TV62/BK 465 CRT Tester
Your test card is upside down! Swap the connections to the frame scanning coils. John.
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31st Jan 2022, 11:21 am | #27 |
Hexode
Join Date: Apr 2008
Location: Perigord Noir, France
Posts: 352
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Re: Bush TV62/BK 465 CRT Tester
Thanks John,
It is always touch and go as to which way the frame coil connections clip into place. No problem with the line as they are different lengths so cannot get mixed up. When I have finished fixing the set I shall ensure that the scan coils are correctly plugged in! Many years ago my brother and I swapped the frame connections on the family TV. The next time someone switched the TV on they got a bit of a surprise! Andy ) |