[Boatanchors] Globe champ ?

[howard holden]

3B28 or 866 wouldn’t work too well, you’d need two of them for a full wave, plus the filamnt voltage is wrong.

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From: w5jo at brightok.net<mailto:w5jo at brightok.net>
Sent: Friday, January 7, 2022 2:04 PM
To: boatanchors at mailman.qth.net<mailto:boatanchors at mailman.qth.net>
Subject: Re: [Boatanchors] Globe champ ?

Or maybe for a 3B28 or 866..

Jim
W5JO

-----Original Message-----


The 5U4 needs an octal socket (8 pins), even though the tube itself may have
only 5 pins. The schematic calls for a 5U4. Maybe someone in the past
changed it out for an 80 or a 5Z3? That could work if the 5U4 wasn’t called
on for the max ratings.



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From: Larry<mailto:lawrenceg94 at gmail.com>
Sent: Friday, January 7, 2022 1:18 PM
To: boatanchors at mailman.qth.net<mailto:boatanchors at mailman.qth.net>
Subject: [Boatanchors] Globe champ ?

My Globe Champ 300a has a socket marked 5U4 but it's a 4 pin socket and not
a 5 pin like the 5U4 tube is.  Having no documentation to look at, does any
one know or have an idea of what tube might go there?  Larry/w0ogh

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