Tube DIY Asylum

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RE: the mighty 841_ sadly ... rare and only generally comparable

Posted by PakProtector on January 25, 2017 at 09:51:13:
The type 841 is fairly low gm, resulting in high plate resistance. The 20B has a lot of gm for a single element( as opposed to a TL304 ). The HY40 comes close, and the 65 Watt cousin HY51 eclipses it.
cheers,
Douglas