dx-100

[Steve]

keith
  i followed you instructions and the meter doesnt
show negative grid current..it looks like wired the other
way you are measuring grid current from the 6aq5 clamp tube..
  i have a copy of the article coming in the mail,
so i can pass it on..
--
thanks
steve
wa7isl :)

Keith Rowland wrote:

> Hi Steve:  That was my listing of QST mods for Heath stuff that you
> saw.  I have the issue in question.  The mod is simple.  It's in the
> Hints and Kinks pages in that issue.  I can't send you the diagram on
> the computer, but here's how it's done:
>
> On the Apache, shift the yellow wire from terminal C1-2 to CJ-1.  See
> Pictorial 22, page 67 of the Apache instruction book.
>
> On the DX-100, see page 34, Pictorial 7 of the DX-100 instruction book
> and then:  Mount an insulated terminal on the spade bolt that holds the
> VFO bracket next to the 500,000-ohm clamp-circuit pot.
>
> Remove the violet wire and the 5.4-ohm resistor from terminal 3 of the
> 500,000-ohm clamp-circuit pot.
>
> Reconnect these leads to the terminal you just installed. Hook up the
> empty pot terminal (#3) to the other side of the 5.4-ohm meter shunt
> (the side opposite from which it was originally connected).
>
> This mod was scontributed by Harold Jensen, W1LUW.
>
> If you need a diagram of the fix, I'll have to send it snail mail.  If
> you need the manual and pictorials, I don't have those, but there are a
> great many others on the reflector who do.
>
> Hope you get it working OK.
>
> 73, Keith
>
> Steve wrote:
> >
> > keith
> >   i saw that listed in a posting for a group of articles
> > out of QST for heathkit mods.
> > need to find copy  of article, hoping somebody on list
> > would have info.
> > thanks
> > steve
> > wa7isl
> >
> > Keith Rowland wrote:
> >
> > > Steven:
> > >
> > > See QST, June 1959, pp. 60-63, for an article titled, "Correcting
> > > Wrong-Way Grid Current in the Heathkit DX-100 and Apache Transmitters."
> > >
> > > 73, Keith
> > >
> > > Steven K. Lords wrote:
> > > >
> > > > i noticed that when the meter switch is in the grid position
> > > > and key up,,,, the needle appears to go negative,,
> > > > anybody know what causes this???
> > > >
> > > > thanks
> > > > steve
> > > > wa7isl
> > > >
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--
thanks
steve
wa7isl :)

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