Trench Valve 4215-A Triode
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5239
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Also known as "peanut valve" (Wacovalve) 6.9cm H 1.6cm dia
Minature valve circa WW1 officially introduced 1923
four pin bayonet thrust. Suite "Howdern" radio.
Tube data available on Franks Electron Tube pages.
Marc
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Location: Sydney, NSW
Member since 28 January 2011
Member #: 823
Postcount: 6678
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I note that a "Pair of W.E. Weco valves 4215A Triodes - BSA G125 boxed" sold on eBay for GBP 25.55 in January 2011.
So, seems they are still around ... at a price.
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5239
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I did expect these to not be a cheap item, however the radio has historical significance and the guy that bought it is going to clean it up.
I appear to have won the job of getting it to run.
Two of the tubes are missing. I have the data sheet of the tube so adapting something to test the other eight , if required. should not be that difficult.
Fortunately it would appear that no one has hooked any filaments to 1.5V and cooked them.
Love the power consumption of the filaments. 250mA each 1.1V
Marc
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5239
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I believe I have scored four "125's"
Obviously an attractive radio to the Fauna. glad it did not make it to my place yet.
First radio I have seen where the first repair is "kill" the timber borers.
Marc
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Administrator
Location: Naremburn, NSW
Member since 15 November 2005
Member #: 1
Postcount: 7290
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The first console I bought back in 1990 had borer damage near the base. I just doused the affected area in metho and that seemed to do the trick.
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5239
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The borers (depending on spiecies) can live up to 4 years.
It is important that whatever is used can either penetrate into the holes, or fill them with something nasty.
One other tactic, is to place the wood in a freezer for around a week
Marc
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Administrator
Location: Naremburn, NSW
Member since 15 November 2005
Member #: 1
Postcount: 7290
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Quite right. I was told at the time that borers can be hardy creatures. I can be pretty sure that I would have got any that may have still been around on that occasion though. I was at it for around half an hour with a squirter and paint brush - recommended at the time by Peter Lankshear.
I'm glad that the affected area was down the bottom because trying to colour match wood filler to all those tony holes wasn't easy. Many were wider than 2mm.
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5239
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I think these are reasonably fine, but until I get a good look at it, there is no real plan.
I see no problem actually filling the holes but there is the issue of the grain and adsorption.
Marc
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