On Tue, Mar 1, 2022 at 06:39 PM, Dave Wise wrote:
In Fast Rise mode, the output tubes provide base drive to the Fast Rise
circuit. See SW242A on the schematic.
SW242B bypasses the AMPLITUDE control in Fast Rise mode, jamming it to
maximum. So don¡¯t leave it running for hours in Fast Rise mode unless you
have lots of spare 7189A¡¯s.
Dave Wise
Hmmm. I have left it on a few times for quite a long time¡
Mine doesn¡¯t have 7189A¡¯s. It has old Philips EL84¡¯s which read very strong. But I¡¯ll check them again when I get back.
I¡¯ll report back when I can get check all that tou guys suggested.
And thanks for the tip regarding preserving the tube life. I¡¯ll certainly be more careful now¡.
