AW: [sdiy] Using Tubes in SDIY

[JH.]

> > I've used a 6BC8 dual triode (just like the UA175 compressor), connected
>
> 6BC8 is so hard to get here in Japan. and I head that 12AT7 can be used
> instead of 6BC8. I check Ep-Ip chart, but it looks like don't work
> well. How do you think about this?

What you need is "remore cutoff" or "semi remote cutoff" behaviour of the
tube.
That is, you need a rather high amount of negative voltage on the grid to
turn
the tube off. I don't know if the 12AT7 fits in here - I'm pretty new to
tubes.
The 6BC8 I tested needs -12V to cut off.

JH.