I am sorry I did not make it clear what the problem is on my first post.
What is happening on the MFJ 941D is my reflected power is showing 3:1 on a
dummy load and I checked it with a Bird meter and it's absolutely flat.
Nothing happens when I try to turn the adjustment screw on the RL except if I
go too far the SWR shows as a dead short. So it is showing some reflected
power. I checked the connections as far as I could see and they look okay.
What I would really like to do is change out the RL before I go any further and
go from there. If anyone has a part number from a parts house, that would help
me tremendously.
Thanks,
Luther, KQ5O
> Date: Sun, 17 Jan 2010 05:00:41 -0800
> From: [email protected]
> Subject: Re: [Drakelist] Off topic:
> To: [email protected]; [email protected]
>
> Luther,
> Looking at the schematic, RL is not in a normally high power location, so
> most likely any pot which will physically mate up should work.
>
> But I like Mike would check the solder joints. Also check the switches. The
> SWR/power switch is also between the diodes and meter. An ohm meter on RL
> should be a quick check for it. An ohm meter from the fwd/ref switch center
> contacts to the "top" of RL should indicated if the SWR/power switch is okay.
>
> Let me know how it goes.
>
> 73,
> Ron WD8SBB
>
> --- On Sat, 1/16/10, Luther Nallie <[email protected]> wrote:
>
> > From: Luther Nallie <[email protected]>
> > Subject: [Drakelist] Off topic:
> > To: [email protected]
> > Date: Saturday, January 16, 2010, 8:46 PM
> >
> >
> >
> >
> >
> > Now that I can get on all bands with my TR4Cw, my tuner
> > went on the blink. It is an MFJ 941D (which is a
> > cheapie, but has worked good for me). I had no meter
> > movement and I changed out the two germanium diodes (1N34A)
> > and got my meter working on forward power but not reflected
> > power. There is a variable resistor located between
> > the two diodes labeled 500K RL that is shot. I
> > don't know the power rating of that component or where
> > to find it, but I think that would fix my reflected power
> > problem. Any help would be appreciated. I know
> > this is off topic, but I need it to use my Drake!
> >
> >
> >
> > Thanks,
> >
> > Luther, KQ5O
> >
> > Hotmail: Free, trusted and rich
> > email service. Get
> > it now.
> >
> > -----Inline Attachment Follows-----
> >
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> >
>
>
>
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