In Reply to: Any benefit to lower than maximum watt output for tubes? posted by glassear on February 26, 2007 at 11:14:19:
Are you talking about the driver 845 or the output 845 or both? Cathode biased or fixed biasedI run my 845 at 880V Vak.
Fixed bias of approx -120V gives 84mA for an anode dissipation of 75 Watts (3/4 of its rated max).
This gives me 20W output.Lower voltage should allow you to run more current and relaxes the bias violtage and peak to peak signal drive requirements. May also reduce rp allowing a lower primary impedance output transformer to be used - that may save some dollars and improve performance.
Cheers,
Ian
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Follow Ups
- Re: Any benefit to lower than maximum watt output for tubes? - Gingertube 19:08:07 02/26/07 (0)