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Reviews Categories | Power Supplies | Jetstream JTPS31MB Help

Reviews Summary for Jetstream JTPS31MB
Jetstream JTPS31MB Reviews: 25 Average rating: 4.9/5 MSRP: $89.95
Description: 25A cont. 30A peak switching power supply
Product is in production.
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KF6WND Rating: 5/5 Sep 20, 2013 17:29 Send this review to a friend
Excellent power supply for its size.  Time owned: 3 to 6 months
I bought this power supply about four months ago. I am using it to power a 100 watt Yaesu FT-747 HF transceiver and a 50 watt, 2 meter rig. This combo is my station at our family retreat. The power supply is small, mechanically and electrically quite. The single meter movement is manually switched to display current and voltage which is variable from 4 to 16 volts. What a great unit for the price.
N4KVE Rating: 5/5 Mar 23, 2013 10:01 Send this review to a friend
GREAT SWITCHER  Time owned: 0 to 3 months
I just purchased this unit last week, but mine says MFJ 4230MV. These units are made by Nissei Electric, & sold by MFJ, Jetstream, QJE, & Powerwerx. Unlike other MFJ supplies, the fan is very quiet, only making noise when it first powers up. The unit powers my Motorola XPR4550, which barely draws 12 amps. However, for HF, I still use an Astron 35 amp linear supply. While I was hesitant to buy a MFJ product, I felt that since MFJ didn't build it, & the reports here were 5/5, I would take a chance. Again, my MFJ4230MV is exactly the same as the Jetstream JTPS31MB. GARY N4KVE
WA0YSL Rating: 5/5 Mar 22, 2013 18:58 Send this review to a friend
Still a 6!  Time owned: more than 12 months
I wrote the first review of this fine power supply. After 2+ years of almost daily use it still doesn't make any noise. On a scale of 1 to 5, it is still a 6!
KI6OSH Rating: 5/5 Dec 13, 2012 23:38 Send this review to a friend
Outstanding!  Time owned: 0 to 3 months
I've owned this for approximately 3 months and so far love it. Works quietly and without any problems so far. Reasonably priced and well constructed, in my opinion. Small in size so it is easy to fit anywhere and very light. Great power supply and we'll see how it holds up over time.
YV3EDO Rating: 5/5 Nov 4, 2012 02:34 Send this review to a friend
SUPERB  Time owned: 0 to 3 months
I bought my PS last week in Houston Amateur Supply in Springs, TX , when I opened the box I surprised by the small size of this PS.
I must confess that I don't trust in switching PS due to his RFI noise, but this small jewel DOES NOT HAVE this RFI issue. I will buy another one for my shack.
Other feature I like is the iluminated dial and no fan noise
Best 73's DX
YV-3-EDO / 6 and /D2
KD0PGV Rating: 5/5 Feb 15, 2012 14:38 Send this review to a friend
Great Switching PS  Time owned: 0 to 3 months
I've been using Comm Series, Astron & Kenwood liner and switching power supplies but I decided to move to a singe 30 amp supply to save room on my desk. After doing some research and reading reviews I purchased the JPTS31MB from, a great retailer by the way. Received it 3 days later and I was up and running. I was surprised at how well this unit was constructed and packaged from the factory. The JTPS31MB has some weight to it for such a small unit, not too heavy but enough to give it a sturdy feel and not slide around on the desk. The knobs and switches are firm and tight. The voltage adjustment knob has a notch that catches at 13.8v keeping it firmly in place in the event that it gets bumped, which prevents accidental movement of + or - voltage. The meter is spot on and well lit with LEDs (not grain of wheat bulbs). The fan spins fast for a second at startup but other than that it's not noticeable. Even running my FT2900 at full power for long QSOs I canít hear the fan while itís running. I've used the JTPS31MB continuously over the past few weeks peaking at around 20 amps at times with it powering my HTX-100, Yeasu FT2900, scanner, and a few other DC accessories. So far it has exceeded my expectations and Jetstream seems like a great company with some affordable quality products. I've only used this supply for 28 - 440 MHz rx/tx so I can't comment on its use on HF transceivers other than 10 meter. If this power supply holds up over the years then I would say itís the best deal you can find for a switching power supply of its rating. 73's
NO9E Rating: 5/5 Jul 17, 2011 12:25 Send this review to a friend
Very handy but not for 160m  Time owned: 0 to 3 months
Small with good metering. The fan comes up on start then is inaudible unless there is a substantial load. I like the connectors in the back. Also the power cable is detachable, a nice feature.

The only problem is RFI. I bought it as RFI quiet to replace MFJ 4225, but the spurs on 160m are 10db stronger than with MFJ. Only audible with K9AY receive antenna. The spurs seem to be radiated by the mains cable.
NW9T Rating: 5/5 Jul 16, 2011 06:34 Send this review to a friend
Does A Great Job  Time owned: 0 to 3 months
I decided to give this power supply a try as the price was right, and the good reviews here on eHam. I've been using it for a while now, and everything has been great. The A/V Meter has been spot on, no hash apparent on any of the HF bands, appears solid and well built. Considering I can buy two of these compared to the price I paid for my last power supply, with the addition of handling more Amperage I think Jetstream has earned a new place on my bench. All thumbs up on this PS.
ZS5J Rating: 5/5 Jun 27, 2011 00:12 Send this review to a friend
Plucky little trooper  Time owned: 0 to 3 months
WOW - I was at Dayton last month, and saw this little gem at the Jetstream booth. I marveled at it's incredibly small size, and capabilities. On talking to the rep, he informed me that they had sold out of all these supplies - he didn't know of any dealer that still had stock, but informed me that they were getting a new shipment in a few weeks.
When I was back home a few weeks after Dayton, I logged into R&L, and noticed that they had new stock. I ordered one for the incredibly low price of $ 85.00. It arrived a week later, and I now have it running my new Flex 1500A transceiver.

This supply is great, incredibly small and compact, lovely V/A meters, adjustable voltage, extremely quite - I haven't heard it's fan yet, and no noise on HF. When operating the Flex 1500 (ideal rig for checking switch mode supplies) I look at the spectrum scope, and all the way up and down the bands that I have looked at, it's as clean as a whistle - no signs of birdies or hash on the waterfall display.

I have tried plenty of other switch mode supplies - I have 2 MFJ switching supplies - poor quality, the paintwork shows its age by the day. I also have a few Astron switch mode supplies with meters - these are good supplies, but noisier and larger than this Jetstream. I really don't need more supplies, but this one is so good, and so cheap, I think I will order two more.

Only thing I would prefer, would be to rather have powerpole connectors on the back. I changed all my DC connectors to powerpoles, so with this supply I have a short pigtail lead with powerpoles on the end. However, I cannot knock the supply for this, as they have put posts on the rear that would be acceptable to most users - not everyone uses powerpoles.

Great product

John, ZS5J
KC2GUY Rating: 5/5 Apr 23, 2011 12:51 Send this review to a friend
Advanced Switching Power Supply  Time owned: 0 to 3 months
The time has come...switching power supplies have finally reached refinement. The jetstream JTPS31MB
30 amp power supply is silent, small, looks great.
Built like a brick. Great lit meter for amps and volts. What more could you ask for? I use it for my VHF/UHF rig and various accessories. NO HASH on the HF rig that sits next to it.

A great, refined power supply at an amazing price from the seller on ebay or other web sites.

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