Re: [HCDX] MFJ-1026 vs ANC-4
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Re: [HCDX] MFJ-1026 vs ANC-4

Hi Rocco,

The problem might be the lamp, working as a lowcost surge protector,  which is installed between the auxiliary input socket and the printed circuit board. Remove the top cover of the unit and try to bypass the lamp with a short piece of wire. Make sure the antenna is connected. If gain increases, you found your problem. Either replace the lamp or bypass it.

Good luck,

Cornel
At 19:52 27-8-00, you wrote:

Hi,
I have bought a mfj1026 a few months ago, but I have been a happy user for
just a week. After that, the unit stopped working, because the auxiliary
antenna input became totally insensitive. Any idea of what happened or how
to solve the problem?
Thanks in advance
Rocco



on 27-08-2000 16:39, Don at ulformat@xxxxxxxxxxxx wrote:

> Patrick
>
> Just a note about the unit I loaned you: It  had the modifications to remove
> the filters that preclude use on MW. see
> http://www.hard-core-dx.com/nordicdx/antenna/special/mfj1026.html for
> "first modification". I did not do the "second modification" to this 1026 --
> undoubtedly it will improve the unit.
>
> These modifications are trivial to make --- rather than desolder the surface
> mount components and risk heat damage to surrounding components, the
> offending filters were "crushed in place" by squeezing them with needlenose
> pliers to to remove them.  Loads easier than attempting to desolder.  Should
> you ever wish to revert, it is easy to desolder the remaining end of each
> component, and to resolder in new surface mount components.
>
> YMMV
>
> Don
> Oregon
>
>
>
> ----- Original Message -----
> From: "Patrick Martin" <mwdxer@xxxxxxxxx>
> To: "Don" <ulformat@xxxxxxxxxxxx>; <amfmtvdx@xxxxxxx>; <irca@xxxxxxxxxxx>;
> <hard-core-dx@xxxxxxxxxxxxx>
> Sent: Sunday, August 27, 2000 12:26 AM
> Subject: [HCDX] MFJ-1026 vs ANC-4
>
>
>> I recently borrowed an MFJ-1026 unit to try and cancel some unwanted
>> noise. Well since the unit arrived there has been no noise. But in
>> comparing the unit with the ANC-4, the MFJ unit is fantastic! The ANC-4
>> unit does a decent job in phasing out unwanted signals, but operating
>> the ANC unit is so touchy and hard to really get a perfect null on a
>> signal especially the locals. I find the MFJ unit much easier to use and
>> works much better. As many of you read, I was able to phase out 50 KW
>> KGO with an ERP of about 500 KW North, at 550 miles, to hear little WHB
>> with 5 KW nights. That is quite a feat even with beverages. Anyone who
>> has heard KGO in the NW knows they are a "powerhouse" Back in the 70s
>> KGO even came in number #2 in the Portland ratings, so many people
>> listened to them.
>> Anyway tonight I was phasing out KSWB-Seaside-840 khz, located 7
>> miles South runing 500w ND. It is easy to hear other stations under them
>> at night. No big deal. However, generally stations to the East as easy
>> to hear like KMAX-Colfax,WA or even Las Vegas, NV with 50 KW at times.
>> But tonight I was able to totally null out KSWB using my Northern
>> Beverage and a vertical to hear at S9/20DB on the Drake R8, CJXX-Grande
>> Prairie, Alberta that doesn't put much signal this way. When KSWB  used
>> to be off at Midnight, CJXX was common off the Northern Beverage, but
>> never strong. A bit later I went over to another local,
>> KVAS-1230-Astoria-1KW at 6 miles, and wiped them out getting  KZZR-Burns
>> OR on top. Butte MT on 1370 by phasing KAST at 4 miles.  I also have
>> heard Gresham OR on 1230 mixing with KVAS during the day. This MFJ unit
>> works!! Works well too. Of course with all my the antennas, beverages I
>> use I can get quite a combo for phasing which makes it nice too.
>> Thanks Don for the use of the MFJ unit.
>> Much appreciated. Fantastic!!!
>>
>>
>> 73s,
>> Patrick Martin
>> Seaside  OR
>>
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> Sections, no Front-Cover Texts, and no Back-Cover Text. A copy of the
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> Permission is granted to copy, distribute and/or modify this document under
> the terms of the GNU Free Documentation License, Version 1.1 or any later
> version published by the Free Software Foundation; with no Invariant Sections,
> no Front-Cover Texts, and no Back-Cover Text. A copy of the license is
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Text. A copy of the license is available in http://www.gnu.org/copyleft/fdl.txt.