2. amps-preamps
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What are the functions of the 5z4 and 0d3 tubes.

I have a BEZ Q3B preamp that uses these tubes as well as a pair of 6922 drivers. Now I know both tubes are for rectification. Just curious as to what these tubes do in a curcuit. I have changed both from the stock tubes and the 0d3 really came alive with a nos GE. The 5z4 has been replaced with a Mullard. Thanks in advance.
south43
south43 OP
386 posts
 
Ah so that's why the glow is different than the rest of the tubes. Tell me Herman have you found any sonic differences between the various 0d3 tubes available. I did have a RCA and replaced it with a GE and found it sounding much better. I have not seen any euro tubes for this particular one and wondered if it was a US only made tube.
herman
2,216 posts
 
Sorry, I've only listened to one amp that used one and only briefly so I have no experience with comparisons.
south43 OP
386 posts
 
Thanks Herman for all the info you provided. I'll probably check on other tubes and compare with what I have now. Good listening!
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