MFJ-259B alignment information?

[Don Wilhelm-2]

Does anyone know where I can find detailed alignment instructions for a
MFJ-259B?

I bought some Vishay precision non-inductive power resistors - 25 ohm, 50
ohm and 100 ohms 100 watt rating to use as dummy loads.  I assembled them to
a proper heat sink and connected to an SO-239 with zero length leads - and
when I tried my MFJ-259 with these resistors, it told me that these
resistors were OK only up to 10 MHz or so!!!  At 30 MHz, the 50 ohm resistor
read 62 ohms with a reactance of 10!!!  Given the specs on these resistors
(flat to at least 170 MHz), I now tend to disbelieve my MFJ-259 and would
like to calibrate it.  I have the instruction manual that came with it and
it is not adequate for a calibration task.

73,
Don W3FPR


_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft    Help:  http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[Vic K2VCO]

Don Wilhelm wrote:
 > I now tend to disbelieve my MFJ-259 and would
> like to calibrate it.  I have the instruction manual that came with it and
> it is not adequate for a calibration task.

Try the MFJ with an ethernet terminator.  I bet it will look much
better.  I suspect the resistors are not as good as they are supposed to be.

--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco


_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft    Help:  http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[Jim Brown-10]

W8JI designed the unit and has written a very detailed alignment procedure that is on his
website. A search on W8JI and MFJ259B will turn up a link.

As coincidence would have it, I found a 259B at a hamfest over the weekend and plan to
use his instructions myself. They look good, but I haven't done it yet. Gotta scare up
some resistors to use as calibration references. Just ordered some from DX
Engineering.


Jim K9YC

On Thu, 15 Jul 2004 21:34:43 -0400, Don Wilhelm wrote:

>Does anyone know where I can find detailed alignment instructions for a
>MFJ-259B?



_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft    Help:  http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[Robert McGwier]

www.w8ji.com/mfj-259b_calibration.htm

> W8JI designed the unit and has written a very detailed alignment procedure that
> is on his
> website. A search on W8JI and MFJ259B will turn up a link.
>
> As coincidence would have it, I found a 259B at a hamfest over the weekend and
> plan to
> use his instructions myself. They look good, but I haven't done it yet. Gotta
> scare up
> some resistors to use as calibration references. Just ordered some from DX
> Engineering.
>
>
> Jim K9YC
>
> On Thu, 15 Jul 2004 21:34:43 -0400, Don Wilhelm wrote:
>
> >Does anyone know where I can find detailed alignment instructions for a
> >MFJ-259B?
>
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft    Help:  
> http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft    Help:  http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[Tom Hammond-3]

Anyone have any success accessing Tom's web site:

    http://www.w8ji.com/mfj-259b_calibration.htm

Every time I attempt it, I either time out or get the old "This Page Cannot
Be Displayed... yadda... yadda... yadda?.

73,

Tom   N0SS

At 10:01 PM 7/15/04, you wrote:

>W8JI designed the unit and has written a very detailed alignment procedure
>that is on his website. A search on W8JI and MFJ259B will turn up a link.
>
>As coincidence would have it, I found a 259B at a hamfest over the weekend
>and plan to use his instructions myself. They look good, but I haven't
>done it yet. Gotta scare up some resistors to use as calibration
>references. Just ordered some from DX Engineering.
>
>
>Jim K9YC
>
>On Thu, 15 Jul 2004 21:34:43 -0400, Don Wilhelm wrote:
>
> >Does anyone know where I can find detailed alignment instructions for a
> >MFJ-259B?
>
>
>
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
>http://mailman.qth.net/mailman/listinfo/elecraft   Help:
>http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft    Help:  http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[Guy, K2AV]

Have not been able to get there either. Hope that's just a temporary
glitch. Tom's site is a treasure trove of good stuff.

----- Original Message -----
From: "Tom Hammond" <[hidden email]>
To: <[hidden email]>
Sent: Friday, July 16, 2004 2:09 AM
Subject: Re: [Elecraft] MFJ-259B alignment information?


> Anyone have any success accessing Tom's web site:
>
>     http://www.w8ji.com/mfj-259b_calibration.htm
>
> Every time I attempt it, I either time out or get the old "This Page
Cannot
> Be Displayed... yadda... yadda... yadda?.
>
> 73,
>
> Tom   N0SS
>
> At 10:01 PM 7/15/04, you wrote:
> >W8JI designed the unit and has written a very detailed alignment
procedure
> >that is on his website. A search on W8JI and MFJ259B will turn up a
link.

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft    Help:  http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com