Looking for power supply recommendations

  • 1
  • Question
  • Updated 3 months ago
  • Answered
I am looking for recommendations for a power supply for my (soon to be) Flex 6400.
Photo of George  N1GB

George N1GB

  • 26 Posts
  • 2 Reply Likes

Posted 2 years ago

  • 1
Photo of David Salomon

David Salomon

  • 111 Posts
  • 26 Reply Likes
Holy battery acid Batman!
Photo of Zack Schindler - N8FNR

Zack Schindler - N8FNR

  • 152 Posts
  • 27 Reply Likes
Are there any power supplies that posters here would NOT recommend due to them emitting high noise levels?
Photo of Christian von Wechmar

Christian von Wechmar

  • 2 Posts
  • 0 Reply Likes
My Alinco DM-330MVE is very noisy on 80m and 160m. Shifting the noise with the control works for 20 minutes or less, and reoccurs. I use mine in ZS with 240VAC.

(My RS-35M was dead quiet on the bands, except for occasional transformer hum. Tightening screws did not help.)
Photo of Gary Johnson

Gary Johnson

  • 104 Posts
  • 31 Reply Likes
Yup that will about do it.
Photo of ka7gzr


  • 221 Posts
  • 37 Reply Likes

I really like my 5 Powerwerks DC supplies...

Photo of Richard Line

Richard Line

  • 6 Posts
  • 1 Reply Like
Very nice power supply !!! Solar charged ?
Photo of K5ROX


  • 138 Posts
  • 31 Reply Likes

If you use a high amp power supply it becomes more important that you fuse each device separately. This isn't a bad idea anyway.

Photo of Don Stefanik

Don Stefanik

  • 93 Posts
  • 16 Reply Likes
My Astron 35m just quit. Was starting to hum really loud then nothing. Fuse burned out. Tried another fuse and bang burned it out as well.
So looking into an Astron 20M ..30 amps 25 continuous. Any issues?. 
Flex 6300, Yaesu FT-2900, MFJ Intellituner, and a string of LED lights. 
Photo of Don Stefanik

Don Stefanik

  • 93 Posts
  • 16 Reply Likes
Just ordered a new 35M. The old one will get repaired at a later date.
Photo of Jeff Saly

Jeff Saly

  • 1 Post
  • 0 Reply Likes
I have been using a Astron RS-35A for years, without any issues.  Powered the Flex 3000 and now the 6400 perfectly.  However, I did re-grease all of the the pass transistors with ARCTIC MX-4 - Thermal Carbon Micro-Particle Compound Paste (via Amazon); runs cooler than ever!!  In contrast, I tried using the Astron SS-50M; lasted 2 weeks before the SS-50M output failed to 5.6 volts (max) :(
Photo of David Decoons wo2x

David Decoons wo2x, Elmer

  • 1517 Posts
  • 338 Reply Likes
I just installed an Alinco DM-330MVT running on 120 volts here in U.S.  No RFI noise. Works well. 
Dave WO2X
Photo of John KB4DU

John KB4DU

  • 166 Posts
  • 41 Reply Likes

There are a lot of options. I have been very satisfied with the three MFJ 4230 power supplies I have, one for each rig. There is no discernible rf noise. I have run the Flex on battery while using the MFJ, and any noise is below the internal noise of the Flex. Mine is mounted beside the 6400 to keep the connections short. The connections are on the rear rather than the front for a clean looking installation. The front panel voltage adjustment allows the output to be adjusted to compensate for wiring losses,so that the the Flex sees the desired voltage during transmit.