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A solid state/electromechanical replacement for magic eye tuning indicators

Katie Bush
Illustrious V-Ratter Moderator

Here's an interesting video, exploring the possibility of a substitute for EM34 style tuning indicator valves.

Topic starter Posted : 21/12/2020 7:30 pm
Famed V-Ratter Moderator

Interesting idea but I think I prefer the all electronic version (rather like the EMI system over Baird)!

Solid State Replacement for 6U5 & 6E5 Magic Eye Tubes (

Posted : 21/12/2020 11:11 pm
Trusted V-Ratter Registered

That's really clever but I would have thought it would be simpler to have a series of segment type LEDs arranged in a circle, covered by some kind of diffuser. Totally electronic, like EMI!

Posted : 23/12/2020 10:49 pm
Noble V-Ratter Registered

interesting idea, looks rather complicated to me though! When it said about electro-mechanical magic eye tubes I thought maybe it would have something like a little meter movement with a pointer made to cast a shadow in front of an led, something I might try myself! I’ve got an R1155 radio here that could do with a new magic eye, maybe time for some experimentation, when I’ve cleared a few other projects out of the way.



Posted : 25/12/2020 12:23 pm
helloekco liked
Illustrious V-Ratter Registered


The one eye I don't think is in terribly short supply is the VI103, they're just expensive.

Now, if we were talking the pre-war Ferranti magic eye (the VFT4) with an IO base and a 4V heater...

Posted : 25/12/2020 12:39 pm