MFJ PowerPole Strips

Discussion in 'Amateur Radio News' started by WJ6F, Jan 8, 2021.

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  1. N1IPU

    N1IPU Ham Member QRZ Page

    Only Issue with those connectors I see is the daisy chain. I see them all the time with equipment I work on and per spec. every third connector needs separate feed. Even then will see burnoffs at the feed point. Being screw type connectors thermal expansion from high current loosens them over time then they melt. Mostly 24vac control inputs in what I see but they are not good for resistive loads. Also try using solid wire skipping every other one on the feed side. So you would have to inputs next to each other then daisy three then repeat for each one so they staggered. Still for the low buck option that's a good start.
    KR3DX and 2E0CIT like this.
  2. KP4SX

    KP4SX Premium Subscriber QRZ Page

  3. 2E0CIT

    2E0CIT Ham Member QRZ Page

    Thanks Mark, your advice is welcomed. The total load on the cheapo choc-block lash up is less than 5 amps, it powers a bunch of bias tees for active antennas, a remote atu, a shack atu and other low current gizmos. If I get to use any higher current stuff I'll follow your instructions. 73, Jeff
  4. K0VWA

    K0VWA Ham Member QRZ Page

    I splurged on a RigRunner 4008H last Spring and really like it but would humbly suggest considering power distribution blocks from the car audio world. They're cheap, effective, available with or without fused outputs and handle whole wheelbarrows of amperes. I added powerpoles all around and have used it to run an inverter, fan, usb charger, etc.

    No electrical training to speak of here - unless you count sticking Mom's bobbypin into the 240VAC air conditioner plug when I was 3. Explains a lot, I suppose.

    Good luck and 73!
    W9PCS and 2E0CIT like this.
  5. PA0MHS

    PA0MHS XML Subscriber QRZ Page

    Before critisizing this guy, I think you should do some math: if I guestimate the wire gauge he used, I'd say it is around 1.5mmˆ2 (15 AWG). To match that cross-sectional area of copper on a standard 35mil PCB, you need traces of 43 mm/1.7" wide. I don't see those wide traces in any of the MFJ products shown in that video. So I'd say this wire-and-terminal-block solution is way safer than those MFJ power bars.

    And as long as you don't tin the wire ends, you'll be safe. A firmly screwed terminal doesn't come loose when heating up. It only does when the wire ends are tinned. But then they'll loosen anyway over time.
    2E0CIT likes this.
  6. N1IPU

    N1IPU Ham Member QRZ Page

    I think you misread my post. Only advice there from using that type of block for years in commercial equipment.
    2E0CIT likes this.
  7. VE3WI

    VE3WI Premium Subscriber QRZ Page

    MFJ power strips have been around for years, so this is more an advertisement than "news". I have an 1126 that has been powered up almost 24x7 for years. The "cheap meter" and "cheap switch" are still working fine. The only problem I had (once) was due to my stupidity. If the unit is left powered up, it's easy to cause a short between a fuse & the enclosure when inserting it, as the fuseholders are recessed. If they were mounted proud of the surface a bit, dummies like me wouldn't have to buy so many fuses;)
    Dave, VE3WI
    K6MTS and N0TZU like this.
  8. 2E0CIT

    2E0CIT Ham Member QRZ Page

    Same here !!! I was 3 when my parents told me never to stick anything in the power sockets, the thought had never crossed my mind until they put the stupid idea in my head.
    I figured I would miss out on something good if I obeyed them. (Like when they told me not to eat all the ice-cream etc)
    As soon as they were out of the room I shoved a pencil in the live socket and found out what electricity is ......and that graphite conducts it very well !:eek:
    73 Jeff
    N6MEJ, K0VWA and VE3WI like this.
  9. KR4BD

    KR4BD Ham Member QRZ Page

    I bought a new MFJ power strip many years ago and when first used, it blew up several fuses. I opened it up and discovered that they had installed 5 amp fuses where 40 ampers should have been! I had trouble finding 40 amps fuses locally and contacted MFJ about the problem I was having. They sent me a small packet with SEVERAL 40 amp fuses and said they were sorry for my problems with the unit. After replacing the fuses, all has worked well for at least the last 20 years.
  10. AE1CT

    AE1CT Premium Subscriber QRZ Page

    I have an astron PS that doesn't have power pole so I find it easier to just wire my radios to the lugs on the PS. I find it to be a better connection.

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