Tube bias meter

Nikifena · Post by **Nikifena** » 29 Nov 2008, 11:15

Hi guys, I make a small meter to bias tube amplifiers
Here is a schematics and pictures how I make this meter:

And the ready to use tester

briggs · Post by **briggs** » 29 Nov 2008, 11:24

Nice work Niki!

That would be so useful for building SE amps! Stops you having to fiddle around inside the little bu**ers, which is always a danger for me as I'm either 1) Heavy Handed or 2) Drunk/Hung Over... I imagine it would be a great safety upgrade for me!

gnognofasciani · Post by **gnognofasciani** » 29 Nov 2008, 11:29

That's awesome!

drumslinger · Post by **drumslinger** » 30 Nov 2008, 04:10

Very nice. Nice clean work. Thanks for the Illustration Niki.

iwantmypie · Post by **iwantmypie** » 04 Dec 2008, 03:27

how much for one

noelgrassy · Post by **noelgrassy** » 04 Dec 2008, 11:03

^ Yeah! How much for one?

Thanks for posting this. It's a really tidy build that most band's techs should be throwing in their toolbag.

RnFR · Post by **RnFR** » 04 Dec 2008, 16:14

very cool.

what gauge did you use for the blue wire?

Nikifena · Post by **Nikifena** » 05 Dec 2008, 12:24

Thanks guys

I don't sell this. I make only one for me.
I give the idea how to make bias meter at home. Just that.
This cost less than 10Eu - in Bulgaria and about 4-5 hours of work and thinking how to do that.

The "blue wires" are pins from 1n4007 diodes - about 1mm.

RnFR · Post by **RnFR** » 05 Dec 2008, 13:33

ok, cool. i thought they looked just like the leads from the resistor. then what did you use for the blue spacers? are they made out of plastic?

Nikifena · Post by **Nikifena** » 05 Dec 2008, 15:06

I make a blue spacers from a multi wire standart cable. I cut the isolation of a cable and insert into the diode pins

I think, that this is not necessary, but I did it - it looks better