Szyckf and Amfibius, as far as I know there are no commercial 845 amplifiers that use a regulated filament supply. Not Cary, not Audio Note, nor ASL. The schematics can be found on the web.
Most DHT amps use a diode bridge > capacitor > resistor > capacitor DC supply, for two reasons:
-it costs less than a regulated supply;
-it sounds better.
AC supplies are not an option, too much hum.
Also, a regulated 10V 3.25A power supply is actually a 35-50 Watts solid state amplifier. Do we REALLY want power transistors (IC or discrete, does not matter) feeding a DHT filament, which is also the tube's signal cathode? I bet that amplifier would sound like the worst of two worlds.
So, maybe KR is feeding you marketing BS to justify a weird product?
A tube with a different heater voltage or current SHOULD get a different number. For example, there are 6SN7s and 12SN7s, self-explanatory (6 volts and 12 V heaters).
This very simple tube industry rule-of-thumb has kept users out of trouble for the last 70 years.
I wish KR and Sophia did not play those marketing games on unwary buyers.
My advice to you: do not import many of those tubes. You are bound to lose money and/or valuable customers.
I own 845 SET amplifiers and have used successfully with zero failures: Shuguang 845A, 845B, 845M and RCA 845.
I wish you good luck with your distribution deal.
Most DHT amps use a diode bridge > capacitor > resistor > capacitor DC supply, for two reasons:
-it costs less than a regulated supply;
-it sounds better.
AC supplies are not an option, too much hum.
Also, a regulated 10V 3.25A power supply is actually a 35-50 Watts solid state amplifier. Do we REALLY want power transistors (IC or discrete, does not matter) feeding a DHT filament, which is also the tube's signal cathode? I bet that amplifier would sound like the worst of two worlds.
So, maybe KR is feeding you marketing BS to justify a weird product?
A tube with a different heater voltage or current SHOULD get a different number. For example, there are 6SN7s and 12SN7s, self-explanatory (6 volts and 12 V heaters).
This very simple tube industry rule-of-thumb has kept users out of trouble for the last 70 years.
I wish KR and Sophia did not play those marketing games on unwary buyers.
My advice to you: do not import many of those tubes. You are bound to lose money and/or valuable customers.
I own 845 SET amplifiers and have used successfully with zero failures: Shuguang 845A, 845B, 845M and RCA 845.
I wish you good luck with your distribution deal.