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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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Thread Tools |
17th Feb 2020, 3:27 pm | #1 |
Hexode
Join Date: Feb 2008
Location: Wrexham, North Wales, UK.
Posts: 466
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Mystery valve
Here's a valve with all the markings rubbed off.
It's a 5 pin base with a screw cap for the anode. Balloon shape with straight (i.e. no convex) sides. Parallel plate anodes. 4 volt indirectly heated, gives around 1 mA/V at 100V anode and screen, zero GB. Pics attached (the reddish tinge is reflection from my pullover!). Can any kind and knowledgeable person identify this? |
17th Feb 2020, 4:29 pm | #2 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Mystery valve
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17th Feb 2020, 9:53 pm | #3 |
Dekatron
Join Date: Sep 2005
Location: Seaford, East Sussex, UK.
Posts: 5,997
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Re: Mystery valve
Sometimes there are marks on the pinch that can help.
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