Hello,
Has anyone used a 5U4 to replace a 5Z3 rectifier tube? I was looking to buy a 4 pin base and a octal tube base and wir the two togther. Would this work, or is there more to it than that?
Thanks
David

Hi David

A 5U4G and 5Z3 are electrically the same. Only bases are different.

Should be able to soak a 5U4G in thinner overnight to soften glue holding the base. Use a 4 pin base from a dud tube and attach it to the 5U4G glass.

You can build an adapter but this adds height. Replacing the base doesn't require buying anything and will look like an original 5Z3.

Norm

:Hello,
:Has anyone used a 5U4 to replace a 5Z3 rectifier tube? I was looking to buy a 4 pin base and a octal tube base and wir the two togther. Would this work, or is there more to it than that?
:Thanks
:David

Looks like the same tube w/dif base so it should work.
But Why?
You can buy a used 5Z3 for only $2.75 at: http://oldradioparts.com/pg1.htm

and new ones are about $6.50

Hi David

Just saw this:

http://antiqueradios.com/forums/viewtopic.php?p=663429#663429

Norm

:Hello,
:Has anyone used a 5U4 to replace a 5Z3 rectifier tube? I was looking to buy a 4 pin base and a octal tube base and wir the two togther. Would this work, or is there more to it than that?
:Thanks
:David

Hi guys, I have been doing this for a long time. Just finished making adapter for 19 tube and #30 tube. Replacement tubes work fine to get radio playing until factory tube can be purchased