In Reply to: DHT "El Cheapo" posted by Eli Duttman on March 12, 2017 at 20:27:20:
It's no longer 'el Cheapo' once you start stuffing rare and valuable tubes into such a circuit
You would be better off looking up the 6P23P which has 11 watt dissipation and mu of 8 (rather than mu of 5.6 for the 46) . It should drop straight in (apart from using lower value grid leaks) and costs a few dollars a piece . I would recommend a separate filament transformer though for the 6P23P . More power , cheaper and more repeatable than a 46 , surely worth a try :)
ps Avoid DN2540 cascodes , high impedence but not across the whole audio band as not particularly low capacitance . use a DN for the top but look into more suitable devices for the lower such as a JFET
George
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Follow Ups
- RE: DHT "El Cheapo" - GeorgePope 09:15:58 03/15/17 (1)
- RE: DHT "El Cheapo" - PakProtector 09:15:19 03/17/17 (0)