understanding chokes

[Tone Junkie]

Ok Im building a 100 watt amp I dont build many of those I would like to use a hammond 159q choke i like the way they sound in a marshall style build but the specs are 7H 150 MA. 500vdc is a 150 MA to low because the power transformer is 290 MA.
Thanks Bill

[sluckey]

Most typical 100W amps don't run the output tube plate current through the choke so you will be fine unless you're building something unusual.

[Tone Junkie]

Thanks Steve just standard marshal type power amp.

[HotBluePlates]

I've got a project going right now which has 2 chokes. One handles the whole-amp current, and is rated for 200mA (for 2 6L6-style output tubes, 3 preamp tubes).

The other choke handles only preamp current. It is vastly overrated at 75mA (again, handling 3 small tubes), but much cheaper than a sensibly-rated part custom-made. It might even be vastly overrated for your amp, in the typical Marshall position feeding the screens.

[Tone Junkie]

Cool HotBluePlates tell us how its coming along as you go.
Bill