Noisy Fan Repair MFJ-4225MV Power Supply for Ham Radio

[@mrdinx]

I made the same modification on my power supply. It is now whisper quiet and doesn’t make the loud noise that it did previously. Well worth the cost and effort.

[@TheSmokinApe]

Glad it worked out for you, I agree it was worth it 👍

[@rxbristol]

Computer fans can be lubed. I learned this trick in my computer repair days. The sticker on the fan can be peeled back to reveal the bearing. Some fans have a rubber plug that also has to be removed. One or two tiny drops of sewing/clipper oil in the bearing hub will quiet the fan like it was brand new.

[@TheSmokinApe]

Good info, thanks 👍

[@DonzLockz]

Good brand fans, and high quality. I've used a few in the past because they are the quietest fans with descent flow. Not so keen on the lack of colour options though. Lol The operation was a success Dr Ape.😁👍

[@TheSmokinApe]

I think this color was called “baby shit”

[@DonzLockz]

@@TheSmokinApe haha, I was gonna say that but you said you like the colour!😁👍

[@mfjenterprisesinc.-canalei1250]

Thanks for the video. It is always nice to see how customers solve small issues.

[@TheSmokinApe]

You bet 👍

[@ohaya1]

Strange that the fan starts without a load on the power supply. Great video!

[@TheSmokinApe]

THanks Ohaya 👍

[@RandallRash]

Nice repair and some Chipmunk talk for entertainment!

[@TheSmokinApe]

Haha, thanks for watching Randell 👍

[@KK6USYHamRadioAdventures]

Nice work Ape, send me the old fan so I can do a video on how to fis it!

[@TheSmokinApe]

LOL, it's on the way Chuck!

[@wrenchmonkey3920]

top tip, Now I get to work where we have a whole lab that just prototypes fan blades. But I used to build & maintain pc's 90s-2ks & hated noisy cheap fans. think I used Papst when I could.

[@TheSmokinApe]

That's awesome. This fan was expensive but it it feels batter than any PC type fan I have messed with in the past.

[@JT-py9lv]

Glad to see that you're repairing the PS. I hate to see so many products being thrown away.

[@TheSmokinApe]

Agreed, thanks for watching JT 👍

[@KS0JD]

Nice easy fix! My guess is that the cfm from the previous fan and the new one were close to the same. I also take photos of anything before I take it apart, (I need that sometimes for my forgetful mind) but you d have that with the video. Good to breath new life into the PS. 73

[@TheSmokinApe]

It’s so much quieter 👍

[@brucemanning8755]

I purchased the fan and installed it. BUT!! my MFJ 4225-mv is much older then the one you have, the fan mounts on a piece of angle steel attached to the bottom of the box. It took much longer to get it installed but works fine, and a much less noise, Bruce

[@TheSmokinApe]

That does sound like a pain, glad to hear you got it working 👍

[@ShooterReadyStandBy]

Dustin Fester? Is that Uncle Fester's nephew? 😅 Good fix to keep an otherwise perfectly good psu working.

[@TheSmokinApe]

Lol, you might be on to something 👍

[@agoraphobicadam1171]

Thanks for sharing, That looks like a repair I could actually do. Stay awesome. KO4HPC 73

[@TheSmokinApe]

Thanks Adam 👍

[@buzzsah]

Fan issues, I hear that. I was working on what the USCG calls a robot, I have the voice module, the need day the cooling fan started interfering with the module, that came across with voice.

[@TheSmokinApe]

Fans are how they get you! Thanks for watching Buzz 👍

[@FEPLabsRadio]

Dang, son - that's louder than mine!

[@TheSmokinApe]

It’s a screamer 😳

[@putteification]

Those vent holes are all too small I think. Any fan is going to be a lot louder when blowing against such a high restriction. Perhaps cut out the sheet metal and install a finger guard there?

[@TheSmokinApe]

Not a bad idea, it’s so much quieter now 👍

[@HOAHamRadio]

Spoken like a true ham…”last thing I want to do is read the instruction manual”

[@TheSmokinApe]

Right.

[@temporarilyoffline]

I've seen worse internals - you're fine.

[@TheSmokinApe]

I really expected much worse 👀

[@Frank_K4FMH]

Did you check to see if those zip ties were in the same phase relationship as the old ones. A Phasemaster 2000 will check those. Ask the dude at Lowe’s if they have one in stock…lol😢 It’s amazing how fan noise can drive you bonkers after a few bourse at the bench… Frank K4FMH

[@TheSmokinApe]

Lol! Yeah man this one just kept getting louder 😐

[@coolbreezez71]

I have the same one and it stopped working ! I believe I have power to the back board . I believe the 2 large Capacitors are working? Do you know anyone who can Diagnose and fix it if I can’t? Thanks

[@TheSmokinApe]

I don't, maybe MFJ support can get you a service manual?

[@Thump2030]

LOL, so what you are saying is that PSU really blows???? 😀

[@CoffeeandHamRadios]

Yes

[@TheSmokinApe]

What he said ☝️