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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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Old 9th Aug 2019, 2:45 pm   #1
mike1 ryan1
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Default Unknown valves

Hi,
Can anyone help identify what these valves may be. I got them in amongst a box of b4 base triode valves I bid on in a sale. All the markings have worn off. If I can identify them I'd like to use them for something maybe.
Thanks,
Mike
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Old 9th Aug 2019, 4:17 pm   #2
g4aaw pete
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Default Re: Unknown valves

Hello Mike

If pins 2 & 7 are missing on the two in the middle, they're probably ARP12 with the metal coating removed.

Have a look at the Valve Museum picture:
http://www.r-type.org/exhib/aaa0572.htm
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Pete
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Old 9th Aug 2019, 4:50 pm   #3
mike1 ryan1
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Default Re: Unknown valves

Here's a view of the pins.
Mike
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Old 9th Aug 2019, 6:33 pm   #4
Marconi_MPT4
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Default Re: Unknown valves

Hi,

Centre spigot size might suggest Mazda octal, and if so with pin 7 missing these could be SP41/61. Height is similar.

Large one to the left in the first picture reminds me of Marconi/Osram KTW61 or KTW63

Cheers
Rich
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Old 9th Aug 2019, 7:37 pm   #5
mike1 ryan1
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Default Re: Unknown valves

Can just make out VR 14....? On one of the smaller ones.
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Old 9th Aug 2019, 7:43 pm   #6
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Default Re: Unknown valves

Bottom one in Post #1 photo, ARP37 ?

Lawrence.
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Old 9th Aug 2019, 7:57 pm   #7
mike1 ryan1
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Default Re: Unknown valves

This is a picture with a filter applied to it.
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Old 9th Aug 2019, 8:02 pm   #8
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Default Re: Unknown valves

Quote:
Originally Posted by mike1 ryan1 View Post
This is a picture with a filter applied to it.
http://www.r-type.org/exhib/aaa0085.htm

?

Lawrence.
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Old 9th Aug 2019, 8:24 pm   #9
mike1 ryan1
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Default Re: Unknown valves

That's what I was just looking at, looks like it most probably is that.
Was thinking this may be the bigger one.
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Old 13th Aug 2019, 6:12 pm   #10
geeoboeh2s
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Default Re: Unknown valves

How about VR116/CV1116/6F32. RAF stores ref 10E/266

Chris
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