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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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11th May 2021, 6:03 pm | #1 |
Octode
Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 1,646
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Valve identification
I ended up with a large haul of valves from a house clearance.
I've been going through them and making a spreadsheet. A few valves have lost their markings, so I wonder if any valve guru here could attempt a spot diagnosis. If not, it doesn't matter too much. Valve 1 is quite particular. It contains multicoloured wires and 12 pins and is marked GS 105 (I think) but Google isn't any help. It looks like a magic eye of sorts, or maybe it's for TV? |
11th May 2021, 6:09 pm | #2 |
Octode
Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 1,646
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Re: Valve identification
Valve 2 is by Raytheon and looks like a half wave rectifier to me. No other markings visible, and Google again wasn't particularly helpful
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11th May 2021, 6:11 pm | #3 |
Octode
Join Date: Dec 2017
Location: Morden, Surrey, UK.
Posts: 1,562
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Re: Valve identification
Looks like a Dekatron to me. (Valve 1)
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11th May 2021, 6:12 pm | #4 |
Octode
Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 1,646
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Re: Valve identification
Valve 3 is a Solus. It is marked B02 A or 302 A of something similar. No hits on Google either
I'll stop here for now Thanks for your contributions Gabriel |
11th May 2021, 6:16 pm | #5 |
Dekatron
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 14,010
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Re: Valve identification
The one with the load of wires is a 'Dekatron' counter tube - used in things like school/collegr Geiger-counters.
See here: http://www.r-type.org/articles/art-132.htm Basically, there was a glow-discharge sustained between one of the wires and a central electrode; when a pulse was applied to one of the intermediate wires the glow 'stepped round' to the next wire in the ring to increase the count. Similar things were used in some 1950s computer timing/clock/synchronisation to generate predictable delays and division-ratios. |
11th May 2021, 6:34 pm | #6 |
Octode
Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 1,646
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Re: Valve identification
Oh yes thank you both.
That's awesome! I think valve 1 is a GS10D or 10E by ETL Gabriel |
11th May 2021, 6:46 pm | #7 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Valve identification
The Dekatron might be a GS10C or D or a close relative:
http://www.r-type.org/inx/inx00366.htm ? The Solus might be a TV valve: http://www.r-type.org/exhib/abd0015.htm ? Lawrence. Last edited by ms660; 11th May 2021 at 6:50 pm. Reason: extra info |
11th May 2021, 6:57 pm | #8 |
Dekatron
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 14,010
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Re: Valve identification
"Solus" were one of the importers/rebranders of valves from Eastern Europe back in the 50s and 60s [along with brands such as Pinnacle] who kept the TV-repair industry supplied with valves after the big manufacturers like Mullard, Philips, Brimar pulled out of the consuner-valves market.
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11th May 2021, 7:05 pm | #9 | |
Octode
Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 1,646
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Re: Valve identification
Quote:
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11th May 2021, 7:17 pm | #10 |
Octode
Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 1,646
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Re: Valve identification
Whilst were on topic of rebranded valves, check out valve 4, branded RTRA with no other discernable markings
Gabriel |
11th May 2021, 7:36 pm | #11 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Valve identification
That looks like a TV line scan efficiency diode possibly a PY88 or similar:
http://www.r-type.org/inx/inx00395.htm Lawrence. |
11th May 2021, 7:36 pm | #12 |
Dekatron
Join Date: Jun 2009
Location: Staffordshire Moorlands, UK.
Posts: 5,276
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Re: Valve identification
Here's another r-type RTRA exhibit
tbh I've never heard of the brand. http://www.r-type.org/boxes/box213.htm
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Kevin |
11th May 2021, 7:53 pm | #13 | |
Octode
Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 1,646
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Re: Valve identification
Quote:
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11th May 2021, 7:54 pm | #14 | |
Octode
Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 1,646
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Re: Valve identification
Quote:
I'll add a few more in a few days. Many thanks to all the contributors. |
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11th May 2021, 7:58 pm | #15 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Valve identification
RTRA....Radio & Television Retailers Association, I used to work with the manager before he became a manager.
Lawrence. Last edited by ms660; 11th May 2021 at 8:04 pm. Reason: correction |
12th May 2021, 9:05 am | #16 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,147
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Re: Valve identification
It later combined with the E.A.A. to become the RETRA, Radio, Electrical, TV Retailers Association. I was a member from May 1974-2003. Scan of my membership number 9148. They often did deals with manufacturers, buying groups etc for their members. I was not aware of their valve brand but had very good suppliers of valves so would not have needed the facility. John.
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12th May 2021, 9:39 am | #17 |
Dekatron
Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 7,088
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Re: Valve identification
Valve 1 - a dekatron to me!
And Valve 4 - a TV booster diode. (As has already been said, for both). |
12th May 2021, 10:09 am | #18 |
Dekatron
Join Date: Nov 2011
Location: Surrey, UK.
Posts: 4,400
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Re: Valve identification
Valve 2 possibly a 35Z5G, these had a tap part-way along the heater for dial lamp shunting, a clever/weird/devious way of keeping the radio going if the lamp failed in a series-string arrangement. Made for the US market with AA5s in mind. There were also other similar rectifiers with a range of heater voltages but the 35V version was widespread
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12th May 2021, 1:56 pm | #19 |
Octode
Join Date: Dec 2018
Location: Llandeilo, West Wales, UK.
Posts: 1,092
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Re: Valve identification
On the triode pentode (?) Solus valve, there looks to be a Mullard / Philips Blackburn code. Can you see 2 or 3 letters / numbers above the ''B8F'' ?
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12th May 2021, 2:12 pm | #20 | |
Octode
Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 1,646
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Re: Valve identification
Quote:
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