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Power Supply recommendations

Discussion in 'General Technical Questions and Answers' started by K1KNN, Nov 23, 2009.

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  1. K1KNN

    K1KNN Ham Member QRZ Page

    Hi it's RT - KD8MGS

    I'm a brand new ham.

    I need your help.

    I'm looking for feed back and recommendations for a power supply.

    My budget is about $150.00

    I'm looking at the MFJ 4035MV.

    The price is right, is it a good unit or should I steer clear?

    I'm pretty sure I'll want meters on my power supply.

    Any input on what you are currently using would be very helpfull.

    Thanks so much.

  2. K8ERV

    K8ERV Ham Member QRZ Page

    There are basically three types of supplies.

    Fixed voltage, usually 13.6, for powering rigs.
    Variable voltage supplies, maybe from near zero to 15 volts or more.
    With or without meters.

    How much current will you need?

    For a base supply consider a car battery, or gell-cell with a small charger. Main problem here is the slightly lower voltage that is available.

    I'm sure you will get a bunch of opinions on this.

    TOM K8ERV Montrose Colo
  3. K9CHP

    K9CHP Ham Member QRZ Page

    I have a Samlex 1223 (23A)and it certainly is a good power supply. Check reviews on This is the PS I use on my mobile station (when connected to commercial power).

    My base station gets its power form a Jetstream JTPS45 (45A), which feeds two radios (but having two hands only and a single mouth, I have not yet mastered how to talk out of both radios at the same time :))

    Check the reviews on eham about the MFJ PS you mentioned.

    Amir K9CHP
  4. WB8B

    WB8B Ham Member QRZ Page

    You cant beat an old Astron RS-35. They've been around for over 25yrs and work well. Some of us have turned Astrons on in the shack and they literally stay on for years! $150 will get you 24A at 100% "Intermittent Communications Service" with a 35A peak at 13.8VDC.

    The MFJ-4035 is just a "mediocre" power supply. They will do the job but they are a "China product" with alot of play in their voltage and current meters accuracy. I have ordered and used about 40 of these 4035 supplies over the years for very simple 2-13V applications in a test lab environment. Most have worked, but some have had failures relating to poor build quality on the inside and needed some repairs.

    Good Luck!
  5. AG3Y

    AG3Y Ham Member QRZ Page

    You do not want to skimp on a power supply. A good one will last you for YEARS.

    I go along with the Astrons. I would favor the analog design, rather than the switching one, if only for the reason that if anything ever did go wrong, it would be easier to repair.

    The choice is yours. 73 and good luck, Jim
  6. AD5ND

    AD5ND Ham Member QRZ Page

    JMHO. A deep cycle battery and a 10amp or more battery charger... The battery will act like a crowbar/filter circuit and will keep you on the air, even if the power company fails you. Switching power supplies have killed many a radio. Just remember to put a fuse between the radio and the battery.
  7. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    Impossible to make a recommendation without knowing what equipment you need to power!

    35A might be fine. Maybe it's very overkill. Maybe it's not enough.

    What are you connecting to it?
  8. K7MH

    K7MH Ham Member QRZ Page

    I wouldn't worry too much about the power supply having meters. I have an Astron RS-20M with both meters and I have almost never had a reason to check them. I got it in 1992 I think it was, maybe 1994. Still works fine.
  9. K1KNN

    K1KNN Ham Member QRZ Page

    Thanks Bob. I'm taking your advice and thank you for the link.

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