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Trivia question. Who made this tube?

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alan.cassidy

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Trivia question. Who made this tube?
« on: 29 Nov 2017, 03:44 am »
I was going through my box of old tubes and found a rectifier tube with most of the writing missing except for 35W4 and underneath it was GOE. I think it came out of an old Hallicrafters S 38 E shortwave radio I have. It got me curious so I looked on line but can't find an answer there. Anyone got an idea.

  Cheers Alan.
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mca

Re: Trivia question. Who made this tube?
« Reply #1 on: 29 Nov 2017, 04:06 am »
How about a picture?
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FullRangeMan

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Re: Trivia question. Who made this tube?
« Reply #2 on: 29 Nov 2017, 04:21 am »
35W4 is a miniature diode half wave rectfier tube, need two for a PS.
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alan.cassidy

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Re: Trivia question. Who made this tube?
« Reply #3 on: 29 Nov 2017, 04:55 am »
Quote from: mca on 29 Nov 2017, 04:06 am
How about a picture?

  Pictures are a bit tough But I'll see what I can do.
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sfox7076

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Re: Trivia question. Who made this tube?
« Reply #4 on: 29 Nov 2017, 05:12 am »
Mostly made by GE or Sylvania, it's a 35V filament (used as a string filament in radios/TVs) half wave rectifier.  Three letters is usually Sylvania.

Shawn
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FullRangeMan

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Re: Trivia question. Who made this tube?
« Reply #5 on: 29 Nov 2017, 05:26 am »
Usual manufactures was RCA GE Sylvania Brimar TungSol Mazda and RMA.
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alan.cassidy

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Re: Trivia question. Who made this tube?
« Reply #6 on: 29 Nov 2017, 06:05 am »

















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alan.cassidy

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Re: Trivia question. Who made this tube?
« Reply #7 on: 29 Nov 2017, 06:11 am »
I can't edit it but a picture speaks for itself. I tried to get the rubbed out writing to show up the best I can and I'm sure it will be familiar to someone. The Hardest part was getting the pictures into the reply. I just found out how to edit, it's called modify, see I'm not too old to learn.
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FullRangeMan

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Re: Trivia question. Who made this tube?
« Reply #8 on: 29 Nov 2017, 04:37 pm »
Never seen this GOE maybe date code, but internally it looks like an RCA.
https://tubeworldexpress.com/collections/rectifiers/products/copy-of-35w4-ge-used-good-1960s-52-40
The frame on name is usual from RCA too, certainly it not GE:
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LarryD56

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Re: Trivia question. Who made this tube?
« Reply #9 on: 30 Nov 2017, 01:32 am »
With a GOE date code below the octagonal box it looks like a Sylvania to me. I had Sylvania 12AU7 blackplates that had the same looking octagonal box and code.

Larry D.
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