Heater voltages

[Mark R]

Quick question

What are the most common heater voltages for battery/mains sets?

1.4v for the DL/DF range of valves, but what others?

cheers Mark

[tiv48]

yep 1.4 and two volt about cover it but some sets using dl dk ect wired them in series so the suppy was 7,5 volts
rob t

[Steve_P]

Depends on how they are wired. 1.4v per valve, 1.5 maximum. But if they are in series, it's nornally 7.5V. The older ones are 2 Volts, which can be harder to get. There's a thread about that elsewhere.

Don't overrun them. Not a good idea.

Cheers,

Steve P.

[Mark R]

Oki doki,
so going on are these sets usually 90v HT?

cheers Mark

[tiv48]

yep d series valves 90 volts older sets used 120 volt and early sets also had grid bias batteries and one set used 2 volt for heaters 120 volt ht1 60/70 volt ht2 and 4 volt for grid bias
rob t