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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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17th Jun 2009, 11:28 pm | #1 |
Retired Dormant Member
Join Date: May 2009
Location: High Wycombe, Buckinghamshire, UK.
Posts: 326
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Pye Piper Pcb Burnt...?
Is it normal for early radios that use PCB to have dis colourd around some of the valves . It is more prevelant around the dropper, this has also had some sort of repair as 2 resistors have been tagged on
This was obviously a real cheap set in its day looking at the build quailty and I am just trying to work out if it will be worth the effort to restore even though it has cute looks about it .... Last edited by benjamin77; 17th Jun 2009 at 11:36 pm. |
17th Jun 2009, 11:37 pm | #2 |
Dekatron
Join Date: Sep 2003
Location: Bolton, Greater Manchester, UK.
Posts: 6,644
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Re: Pye Piper Pcb Burnt...?
Yes it is. Sometimes it causes a problem, but not often. These sets are cheap put they do work. There are two examples here:
http://www.vintage-radio.com/recent-...pye-p115u.html http://www.vintage-radio.com/recent-...pye-p116u.html Cheap, cheerful and they do work. Cheers, Steve P.
__________________
If we've always had it, why is the Car Boot open? You're not sneaking another Old TV in are you...? |
17th Jun 2009, 11:42 pm | #3 |
Dekatron
Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,526
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Re: Pye Piper Pcb Burnt...?
Unfortunately, yes.
It can cause real problems if the PCB is carbonised to the point where it's electrically leaky between the valve base pins- resorting to drilling out grid pin holes, sleeving and wire links is not unknown! If it's not too bad a bit of scraping and TLC will do- it's not as if the set will be used for long periods any more. Just noticed Steve was quicker off the mark..... Chris |
17th Jun 2009, 11:49 pm | #4 |
Retired Dormant Member
Join Date: May 2009
Location: High Wycombe, Buckinghamshire, UK.
Posts: 326
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Re: Pye Piper Pcb Burnt...?
Well maybe I wil give it a second chance then....after what have I got to loose....
Oh and I also forgot to mention that I noticed the ceramic is missing on some parts of the dropper should this be something to get concerned about and loose sleep ? |
18th Jun 2009, 8:32 am | #5 |
Pentode
Join Date: Jul 2007
Location: Salisbury, Wiltshire, UK.
Posts: 174
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Re: Pye Piper Pcb Burnt...?
This thread may worth a look. Its shows how I got around the problem with the UL41 grid leakage due to carbonizing around the valve base:
https://www.vintage-radio.net/forum/...ad.php?t=20888 |
18th Jun 2009, 10:02 am | #6 |
Dekatron
Join Date: Jul 2008
Location: Charmouth, Dorset, UK.
Posts: 3,601
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Re: Pye Piper Pcb Burnt...?
This was a problem on early Pye colour TV's, the only cure was to cut the print away from the offending pins on the valve bases and hard wire them.
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