2. amps-preamps
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Rectifier tubes?

I have an Air Tight HTM-300 amp which has tube rectification. I've rolled a number of NOS types over the last three years and am wondering two things: 1) How long a life do these tubes have, in general, and 2) Any suggestions for good rec. tubes (5U4GB) in this amp or in general? I'd especially be interested in new tubes as NOS are hard to get and are iffy.
tomryan

Showing 3 responses by chriskeating

chriskeating
189 posts
 
You shoulc contact Sophia Electric. They make a 274B solid plate or mesh plate that could be magic in that amp.
www.sophiaelectric.com

They are very nice folks too!
chriskeating
189 posts
 
tomryan,
The 274B is most likely a drop in, but there are instances where it is not viable. It comes on quicker than the 5U4. The folks at Sophia can help with that advice. I use a softstart with my stuff, so it is not an issue.
chriskeating
189 posts
 
The original Western Electric 274B is the king of all 5U4G rectifiers. The Sophia exhibits some of the traits. It is open and extended and strong in the bass. The mesh version may even be better than the standard one. It is priced fairly for a very well made and robust tube.
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