So that Idiots dont use the 6.3v supply for other heaters as the supply for the diode's filament, therefore making all the heaters biased at +400v
Nah.. 5U4, 5Y3, etc are very old designs, back when most tubes used a 5v filament supply. I think.
I you get a diode with a cathode (damper for example) they use 6.3v heaters.
Nah.. 5U4, 5Y3, etc are very old designs, back when most tubes used a 5v filament supply. I think.
I you get a diode with a cathode (damper for example) they use 6.3v heaters.
5AQ5s, 3AU6s, 7DJ8s, etc. were used in TVs with series heater strings. A bunch of tubes with the same heater current draw whose heater voltages totalled to 120 V. were wired together.
AMOF, the "A" seen in 7 and 9 pin mini type designations (6AU6A, etc.) indicates controlled heater warmup time. The "A" types are for series heater string service. Profit matters, you know. Save the expense of filament windings in the power trafo. Never mind that when any given heater fails, the whole string goes dark.
AMOF, the "A" seen in 7 and 9 pin mini type designations (6AU6A, etc.) indicates controlled heater warmup time. The "A" types are for series heater string service. Profit matters, you know. Save the expense of filament windings in the power trafo. Never mind that when any given heater fails, the whole string goes dark.
Hi Eli,
Yes, and they are used in other things as well. Point is, a 5V heater may be waiting to make someone famous, posthumously. That's what Colt45 was poking fun at I think. There is always some truth in a joke, no?
I think I saw 5AQ5A's used on a computer based amp. Cool and scary at the same time. Computer guy + a couple hundred volts. Wow.
-Chris
Yes, and they are used in other things as well. Point is, a 5V heater may be waiting to make someone famous, posthumously. That's what Colt45 was poking fun at I think. There is always some truth in a joke, no?
I think I saw 5AQ5A's used on a computer based amp. Cool and scary at the same time. Computer guy + a couple hundred volts. Wow.
-Chris
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