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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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20th Jul 2021, 3:17 pm | #1 |
Hexode
Join Date: Feb 2011
Location: Newcastle upon Tyne, Tyne and Wear, UK.
Posts: 280
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Repairing Bush DAC90 capacitor question.
Is there any reason not to use cheaper 630v polyester film capacitors (the dipped type, usually orange/red or green) . I have noticed that people seem to use the small yellow polypropylene type - I use those in audio or guitar amplifiers, but valve radios are lofi high distortion things.
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20th Jul 2021, 4:17 pm | #2 |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,725
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Re: Repairing dac90 capacitor question
No problem with using them at all.
I suppose most modern components have radial leads and some of us might feel they look out of place in vintage equipment.
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-- Graham. G3ZVT |
20th Jul 2021, 4:47 pm | #3 |
Hexode
Join Date: Feb 2011
Location: Newcastle upon Tyne, Tyne and Wear, UK.
Posts: 280
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Re: Repairing dac90 capacitor question
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20th Jul 2021, 10:44 pm | #4 | |
Dekatron
Join Date: Nov 2009
Location: Lincolnshire, UK.
Posts: 5,000
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Re: Repairing dac90 capacitor question
Quote:
There's nothing worse than turning over a chassis to find that someone's done a bodge job with modern style radial capacitors. They'll work just as well as the axial type, but often the leads aren't long enough and need extending or stretching and pulling across other components. It's just nasty and unprofessional if you're a genuine vintage repairer or restorer and it's not as if the correct type are expensive. Someone who ends up with the set in the future will probably have to snip them all out and do the job all over again! |
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21st Jul 2021, 9:16 am | #5 |
Octode
Join Date: Nov 2005
Location: Surrey, UK.
Posts: 1,874
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Re: Repairing Bush DAC90 capacitor question.
The resin dipped radial capacitors are cheap and reliable, but I agree that they look out of place on most wired chassis. I would certinly not fit them undisguised to a pre-war receiver.
A good compromise where waxed cardboard tube capacitors are fitted, is to warm and pull out the contents of the old capacitor, just leaving an empty tube. In many cases where the value rquired is <100nF, a radial lead device can be inserted in the tube, extending the leads if neceesary with the joint inside. This gives a cheap and reliable fix without compromising appearance. I generally do not encapsulate the assembly - there's no point. If the tube is in danger of moving axially, an internal blob of adhesive will suffice. New axial lead devices are now expensive relative to radial types and still don't look good on old sets. Leon. |