RE: 7788 brands

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In Reply to: 7788 brands posted by DoggyDaddy on January 29, 2023 at 19:49:19:

First rule: brand on the bottle means little. 7788 was never a high volume tube; probably had few actual makers. Amperex likely imported Philips tubes, maybe from more than one division or factory. RCA and Westinghouse are likely Philips as well. All Philips divisions marked a factory and date code, usually near the bottom.

https://frank.pocnet.net/other/Philips/PhilipsCodeListAB.pdf

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Follow Ups Full Thread

Topic - 7788 brands - DoggyDaddy 19:49:19 01/29/23 (2)

RE: 7788 brands - Tom Bavis 19:16:03 01/31/23 (1)

RE: 7788 brands - DoggyDaddy 13:30:48 02/05/23 (0)

Follow Ups

RE: 7788 brands - Tom Bavis 19:16:03 01/31/23 (1)

RE: 7788 brands - DoggyDaddy 13:30:48 02/05/23 (0)

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