by Eeyore <rabbitsfriendsandrelations@[EMAIL PROTECTED]
>
Apr 21, 2008 at 11:44 PM
Iain Churches wrote:
> Can I suggest a topic for you? A current limiter for tube heaters.
> People are keen to use voltage regulation, which doesn't seem to
> me to be so im****tant. Heaters are specified at +/- 5% so
> anything between 6V and 6V6 for a 6V3 heater is within tolerance,
> and with a wirewound pot between two 'lytics one can get it spot on.
> But heaters draw huge currents at switch on. Do you have a circuit,
> using those funny black things with ****ny legs, that could current
> limit? Two circuits would be of interest. One at say 1.2A
> (a pair of B9A's) and one at 3A (a pair of EL34's).
What's the alleged advantage of limiting heater current ?
Graham
