[Heathkit] DX-35 Grid Drive

[Bill Stewart]

Hello Gene,
I think I'd take somewhat low drive to high (in my case a min of around 3.5 ma).

So far I have changed the buffer scr. dropping resistor from 27K to slightly above 50K. The drive dropped down to between 2.5 and 3ma (min. adjusted). Note sounded good. BUT, something else has now happened (my luck). Now it won't dip and the plate cur. pins the meter plus heard some arcing. I'm now in the process of trying to find that problem..and trying to be careful and not zap the glass pwr. xfmr. Ain't this stuff fun??? Mo later.

Thanks to all for your comments.

73, Bill K4JYS
 
----- Original Message -----
From: "Gene" <erastber at tampabay.rr.com>
To: "Bill Stewart" <cwopr at embarqmail.com>
Cc: "heathkit" <heathkit at mailman.qth.net>
Sent: Monday, November 29, 2010 3:14:25 PM
Subject: Re: [Heathkit] DX-35 Grid Drive

Bill:

Very interesting that you have too much drive -  I have a '35 that I
rebuilt some time ago and I have the opposite problem: very low drive.
So, could you send me some of your extra drie????

Gene, W0QFC




On Sun, 2010-11-28 at 09:05 -0500, Bill Stewart wrote:
> 
> During the last few days I fired up a DX-35 from the fix-it shelf and it worked ok from the start. However, I did find a few loose solder joints so went over it with the iron. I added a fuse and pulled the modulator tubes to reduce the load on the pwr xfmr. So far the only problem I see is too high grid drive on 80/40 mtrs. The min. I can get is around 3.5ma. and w/o much adjustment. Twenty mtr grid drive is adjustable from 1.5 to 5 ma. Any idea how I can reduce the grid drive on 80/40? It should be around 2.5ma. for the good health of the 6146. 
> 
> Thanks...73 de Bill K4JYS