Tubes Asylum

Well, yes, some odd DHTs with higher mu

2.126.104.197

andy evans

A

In Reply to: RE: Nothing close to mu=20, plenty of mu=8 posted by FlaCharlie on March 18, 2023 at 13:31:49

Thanks for the update FlaCharlie. I was aware that there were some higher mu DHTs like the 3a5 for instance, but nothing I would use. The 3a5 isn't bad if its gain suits, but it's not mu=20.
The twin triodes are nothing special - 1J6 has very unbalanced halves - I had several and only a handful were balanced in any way. Sounded OK but I wouldn't use it. 3B7 sounded quite bad.

Edits: 03/20/23

Follow Ups:

RE: Well, yes, some odd DHTs with higher mu - FlaCharlie 06:50:36 03/19/23 (0)
Yes, I had forgotten about the 3A5, which is a 7 pin mini with mu of 15. I plan on trying it sometime.

I think you must mean the 1J6G as the 6J6 is indirectly heated. There is also the 1E7G, which is a dual DHP. I'm not sure what the mu is in triode. I've tried both the 1J6G and the 1E7G and they sounded good to me but I preferred others. I only used them with sections in parallel so I didn't notice any mismatch between sections. As I recall, the bass was very articulate using the 1E7G.

The 3B7 is a loctal with mu of 20. I think I have a couple but haven't tried them.

There's also a DHT triode / diode with a mu of 65 which comes in both octal and loctal bases. The octal is the 1H5G / GT, which has a top cap. The loctal is the 1LH4, which has no top cap.

And some other DHPs but I'm not sure what their mu is in triode.

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