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https://www.decware.com/cgi-bin/yabb22/YaBB.pl AUDIO FORUMS >> Replacement Tubes >> RCA 57-22 vacuum tube? https://www.decware.com/cgi-bin/yabb22/YaBB.pl?num=1696078569 Message started by SonicSeeker on 09/30/23 at 13:56:09 |
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Title: RCA 57-22 vacuum tube? Post by SonicSeeker on 09/30/23 at 13:56:09 I have a coke bottle shaped 57-22 by RCA and can't remember what this is? It has been in my drawer of tubes for 30 plus years so I don't recall. Anyone know what this is equivalent too? |
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Title: Re: RCA 57-22 vacuum tube? Post by Gilf on 09/30/23 at 14:48:32 Hi Sonicseeker. I recall that it may be a voltage regulation tube, similar to an OB2. I could be wrong. My old mind doesn’t work like it used to. I have a couple from an old reel to reel and I think that’s what they were. How do you like your Manley Chinook? I used a number of Manley products in my recording studio days. They were very nice. I’ve never heard their hifi products. |
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Title: Re: RCA 57-22 vacuum tube? Post by SonicSeeker on 09/30/23 at 15:01:16 5R4G-Y I think |
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Title: Re: RCA 57-22 vacuum tube? Post by CAJames on 09/30/23 at 15:37:17 Quote:
That certainly looks like a 5R4. I've been browsing a number of RCA tube manuals and can't find any reference to a type 57-22. That kinda sounds like a date code to me: 22nd week of 1957. |
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Title: Re: RCA 57-22 vacuum tube? Post by Tubecan on 09/30/23 at 19:42:39 Yup RCA 5R4GY..I have a 58-35….1958,35th week. |
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