Re: 813 VTTC Problems

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Chris Fanjoy" <zappyman@xxxxxxxxxxx>


Not to worry, I noticed that mistake myself but just didn't bother to 
point it out. Just wish I'd be that alert at more important times....

I'm going to try connecting the G1 and G2 together ("triode 
connection"), and the G3 at ground, and see what happens. I recently 
received some TDK UHV-6A caps so this should at least provide a 
reliable tank cap if nothing else (my homemade MMC was no good...)

-Chris


From:  "Tesla list" <tesla@xxxxxxxxxx>
To:  tesla@xxxxxxxxxx
Subject:  Re: 813 VTTC Problems
Date:  Tue, 30 Aug 2005 11:41:51 -0600
>Original poster: Ed Phillips <evp@xxxxxxxxxxx>
>
>"    How exactly should the G2 and G3 grids of these tubes be
>connected
>to the circuit? And are they actually supposed to draw current?
>     Thanks for any advice."
>
>         If you're using them in the pentode configuration you
>should tie
>g2 to
>the filament (preferably to the center tap of the transformer but
>not
>essential).  I haven't bothered to look at the data book but the
>screen
>grid (g2) can draw plenty of current.  You didn't mention the grid
>(g1)
>bias when you did this experiment.  Tubes are probably undamaged.
>
>Ed"
>
> Grid 3 to the filament.  Grid 3! Grid 3!Grid 3!  Just proves the
>need
>for proofreading before hitting that enter key!!!
>
>Ed
>
>