Heater Supply Circuits-AC and DC

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CJ

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thought we could throw down some vac tube heater circuits all in one place,

there are a ton of them out there, AC and DC,

never had much luck with regulators, they do not like the start up currents,

and sometimes the high voltage plate supply finds it's way to the regulator,

here is a DC supply to get things rolling,
 

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CJ

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here is another DC circuit, taken from Vacuum Tube Valley,

 

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CJ

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something a little different, just for kicks,

here is a preamble to a weird RF heating scheme>

 

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CJ

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here is a circuit with a 5 V-ac and 6.3 v-ac combined, AC/DC>

 

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CJ

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here is an imaginative approach, uses a Lamda DC supply in conjunction with the regular supply>
 

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CJ

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this supply has the heaters biased up from the HV supply>
 

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CJ

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this is another elevated supply only DC this time>
 

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CJ

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elevated 6.3  and hum balanced 2.5 V-ac circuit

individual transformers for the 2.5 V-ac tubes>
 

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CJ

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series resistor because heater voltage was 7 V-ac instead of 6.3>
 

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CJ

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stacking different 6.3 V-ac tubes to get correct voltage drops>
 

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CJ

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DC supply with single diode,

memory capacitors?  ???  maybe scrounged out of disposable cameras?  :eek:

 

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CJ

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elevated AC supply using cathode bias voltage>
 

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CJ

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infamous Marantz 10B tuner, has regular AC, elevated AC,

a and minus biased AC for the mini CRT which was used for tuning stations,
 

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CJ

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infamous Fisher 500C has some weirdness (translate-do not understand)  :D

has a -22 V-dc series string on a few 12AX7's,

and some funny caps on the upper string>
 

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