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Trench Valve 4215-A Triode
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Return to top of page · Post #: 1 · Written at 10:57:58 PM on 7 February 2012.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5605
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

Return to top of page · Post #: 2 · Written at 1:02:33 AM on 8 February 2012.
	GTC Location: Sydney, NSW Member since 28 January 2011 Member #: 823 Postcount: 6887
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.

Return to top of page · Post #: 3 · Written at 9:43:14 AM on 8 February 2012.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5605
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

Return to top of page · Post #: 4 · Written at 9:32:01 AM on 15 February 2012.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5605
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

Return to top of page · Post #: 5 · Written at 11:56:09 AM on 15 February 2012.
	Brad Administrator Location: Naremburn, NSW Member since 15 November 2005 Member #: 1 Postcount: 7564
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...

Return to top of page · Post #: 6 · Written at 6:36:38 PM on 15 February 2012.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5605
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

Return to top of page · Post #: 7 · Written at 7:46:59 PM on 15 February 2012.
	Brad Administrator Location: Naremburn, NSW Member since 15 November 2005 Member #: 1 Postcount: 7564
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...

Return to top of page · Post #: 8 · Written at 11:04:41 PM on 15 February 2012.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5605
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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