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A Better Transmatch for an Amateur Radio Operator! PALSTAR AT2K(BALUN VERSION!)!

Discussion in 'Ham Radio Discussions' started by N3IFD, Dec 3, 2012.

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  1. N3IFD

    N3IFD Ham Member QRZ Page



    This Transmatch(MFJ-969) has it's sensing circuitry too close to other circuits.

    I would prefer to use a Transmatch that kept the sensing circuits somewhat "isolated" from other circuits.

    Try using a Transmatch with no extras inside and an external Wattmeter / V.S.W.R. meter combination.

    The following Transmatch(MFJ-901B) has no sensing circuitry. It can't interfere them. It's also well proportioned inside.
    Circuits are direct. Less of an opportunity to induce stray R.F. inside. It's a step-inductor, but at least it's an air-
    core inductor.




    I found a MUCH BETTER Transmatch!

    [​IMG] front.jpg

    [​IMG] rear.jpg

    [​IMG] inside.jpg


    There seem to be 2(two) versions of this transmatch. I think the one with the internal balun is the better one.


    P.S.: Sorry about the size of the pictures. They were the only ones I could find that were still relevant! I usually
    watch the scale on pictures. I hope this isn't a problem.
    P.P.S.: Joe(JOE-KB3ZGV), please take note! This would be a better instrument for you to utilize!

  2. W8ZNX

    W8ZNX Ham Member QRZ Page

    so what
    you compare two bargain MFJ tuners
    with a high end Palstar

    why don't you compare the Palstar
    with a real balanced no balun

    Johnson KW Matchbox


    the little Johnson Matchbox can handle legal limit
    the big Johnson Matchbox can handle 3 KW
  3. K5FH

    K5FH Premium Subscriber QRZ Page

    MFJ-989D (updated version of 969): around $300

    Palstar AT-2K with balun: around $500.

    And, as Mac mentioned, neither is really designed to handle open-wire line.

    For that, you should use a double-L network tuner such as the Palstar BT-1500 (around $650).

    Or, better yet, homebrew your own (not that difficult):
  4. N9DSJ

    N9DSJ Ham Member QRZ Page

    I am shocked! You think a $500 Palstar is better than an MFJ $300 transmatch? Who would have expected that?


    Bill N9DSJ
  5. N9DSJ

    N9DSJ Ham Member QRZ Page

    Actually, to divert a bit, making one yourself is one of the more cost effective solutions out there; especially if one has a decent junk box. Not sure how many other items fit into that category; certainly a sound card interface is one of the top candidates as are wire antennas.


    Bill N9DSJ
  6. KA4DPO

    KA4DPO Premium Subscriber QRZ Page

    It is? I'm absolutely shocked.

    I agree with Mac except I think the KW matchbox can handle 4KW PEP.
  7. KJ3N

    KJ3N Ham Member QRZ Page

    Captain Obvious?
  8. WA7PRC

    WA7PRC Ham Member QRZ Page

    No ATU needed here on 80/40/20/15/10m.
  9. KO6WB

    KO6WB Premium Subscriber QRZ Page

    That's a surprise, I'm going to die from not surprise.
    There are some that advocate other tuners and don't like the Palstar offerings.
    Glad you're happy
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