In Reply to: Re: BATTERY for filament heating posted by dave slagle on October 28, 2001 at 15:22:33:
Well Dave,they have the V shaped filament (ok I should call it heater but like I say looks and glows same amount as PX4 V filaments). The cathode is connected at the midpoint and they sound pretty good!!! Whether that cathode connection makes them the same characteristics as a dht but with an equal tap I don't know.
I haven't heard any other idht output valves except the 6EM7 power stage. The 6EM7 is far more clinical, and gets distorted at high output, as a look at the curves would tell (know you don't bother much about curves but they do guide and in practice yes though I prefer 6EM7 to multi grids hooked up as triodes it ain't a dht.) I would like to get hold of some R120's they would be an inetersting listen compared to the 2a3 type and these 6a5g's.
Regards
Paul
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