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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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Thread Tools |
6th Apr 2019, 2:39 pm | #1 |
Heptode
Join Date: Jan 2016
Location: Gateshead, Tyne and Wear, UK.
Posts: 504
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Philips BX355U dropper
Any idea what I can replace this broken voltage dropper with. The service sheet shows resistors 2,3&4 as per pictures
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6th Apr 2019, 6:57 pm | #2 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,173
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Re: Phillips bx355u
Hi Nukey, the circular resistor is an RS "section", very popular for this type of replacement in the day.
I may have something suitable so give me a call if you are stuck. Ed |
7th Apr 2019, 6:02 pm | #3 |
Heptode
Join Date: Jan 2016
Location: Gateshead, Tyne and Wear, UK.
Posts: 504
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Re: Philips BX355U dropper
Thanks ed, may pop it up to you this week one night if i get a chance, you know me and valve sets we are not really on speaking terms
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8th Apr 2019, 1:21 pm | #4 |
Dekatron
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 13,953
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Re: Philips BX355U dropper
I made up a replacement for the dropper in my Philips B2X67U out of several 7-Watt ceramic "coffin" resistors fitted around the original ceramic-tube support (whose windings I cut away).
Seems to work fine, though it's in no way a thing of beauty! |
8th Apr 2019, 2:54 pm | #5 |
Dekatron
Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,528
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Re: Philips BX355U dropper
Doesn't sound any worse than a bunch of Radiospares ceramic polos....
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8th Apr 2019, 8:37 pm | #6 |
Dekatron
Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
Posts: 9,637
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Re: Philips BX355U dropper
When RS was Radiospares, they sold replacement droppers for such radios. There must be one languishing in a workshop somewhere, and they do occasionally surface on eBay. The "Polo" sections replaced them eventually, grow your own droppers.
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8th Apr 2019, 8:47 pm | #7 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Philips BX355U dropper
The proper way for us was to mount them on a secured length of threaded rod, I did a few back in the day, I forget the thread size, might have been 2BA, that was a workshop job, often done to replace a field repair job of dropper sections growing a la grape style.
Lawrence. |
10th Apr 2019, 9:40 pm | #8 |
Dekatron
Join Date: Aug 2013
Location: Wigan, Greater Manchester, UK.
Posts: 9,427
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Re: Philips BX355U dropper
Yes 2BA threaded rod, I found sections extremely reliable.
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Frank |