3 Sep
2008
3 Sep
'08
10:25 a.m.
On 3 Sep 2008 at 9:56, William Blair wrote:
Can't get much cheaper than effectively free for a
well regulated,
high current DC power supply using a modified PC power supply that
isn't otherwise being used. Plus, the idea of using tubes with 5V
filaments instead of 6.3/12.6V reduces the competition with typical
audio tube customers and makes the use of a high-current 5VDC supply
possible.
For digital circuits (I assume that's what we're still discussing),
why is a DC heater supply necessary?
If you do decide to use a regulated DC supply with overcurrent
protection, keep in mind that cold heater inrush current can be
substantially greater than the nominal heater current rating.
Cheers,
Chuck