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Title: Eimac 4-400B in Johnson 500? Post by: KW6T on June 23, 2024, 11:52:45 PM I have a nice pair of Eimac 4-400B's and cannot find any specifications on them. So far, a google search only yielded a dead link. I am hoping they will be good spares for my Viking 500.
Any thoughts on where to find data for this tube, and/or suitability for the 500? Thanks. Russ KW6T Title: Re: Eimac 4-400B in Johnson 500? Post by: Pete, WA2CWA on June 24, 2024, 02:58:02 AM The Amperex 4-400B is the same as the Amperex 7527 tube AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
https://frank.pocnet.net/sheets/201/7/7527.pdf Click on the picture of the tube: https://www.tubedepot.com/products/4-400b |