Quality Power Supply for a 2970n4

[dave’s delta]

What’s the experts High quality power supply being recommended for these radios these days?

 

[BJ radionut]

http://www.randl.com/shop/catalog/product_info.php?cPath=9020&products_id=29227
RM-60M ASTRON
Input Voltage 105 - 125Vac
Output Voltage 13.8Vdc +/- 0.05Volts (internally Adjustable 11-15V)
Ripple Less than 5mV peak-peak (full load & low line)
Continuous Duty 50 Amps
ICS 55 Amps surge
Size 7" x 19" x 12-1/2"
Shipping Weight 55 lbs.



http://www.randl.com/shop/catalog/product_info.php?cPath=9020&products_id=29443
RS-70M ASTRON

Input Voltage 105 - 125Vac
Output Voltage 13.8Vdc +/- 0.05Volts (internally Adjustable 11-15V)
Ripple Less than 5mV peak-peak (full load & low line)
Continuous Duty 57 Amps
ICS 70 Amps surge
Size 6" x 13-3/4" x 12-1/2"
Shipping Weight 48 lbs.

Fold-Back Current Limiting Protects Power Supply from excessive current &
continuous shorted output.
Crowbar Over Voltage Protection
Maintain Regulation & Low Ripple at low line input voltage.
Heavy Duty Heat Sink
Chassis Mount Fuse
Three Conductor Power Cord

http://www.randl.com/shop/catalog/product_info.php?cPath=9120&products_id=66748

MFJ 75 Amp Switching Power Supply

MFJ’s heavy-duty 75 Amp switching power supply is excellent for powering your HF mobile amplifier or your HF and VHF/UHF rigs and accessories.

https://mfjenterprises.com/products/MFJ-4275MV

 

[sp5it]

DPS600PB
Mike

 

[BJ radionut]

Dave: I was short on time when I posted those links.
I wanted to note that I have and use ALL those models listed.
The MFJ supply is the same as the private label JETSTREAM version that R & L selles also. (which is the one I own) I have run a 400 watt+ amplifier off of that version.
It has performed well. The fan is quiet until you really "warm" it up, but even high speed it is not obnoxious. I do like to clean that out every 6 months as the continuous running fan does pull in "Gunk" over time.
The Astron models listed work VERY well. I have a 400-watt amplifier on the 70M version now, and it works excellent with excellent regulation. The small fan inside that is not even noticeable when running, even when the supply is loaded down for a good length of time.
I prefer the Linear types to the switching type for that reason. Quiet!
I, however, think any of the models listed will work well as the spec on your radio require 35 amp continuous.
I always prefer to size power supplies at a level of 125% minimum that is required for my equipment. Just I as never want my supplies running right near the edge of their capacity.
You paid good money for that rig I am sure, as I have mine. I think it makes no sense to run my expensive rigs or amps and then cheat on $$ for my power supplies.
Again MHO
GL
All the Best
Gary

 

[Ranch55]

I have bench tested a couple of the 2970N4 radios.
I found that a 50 amp power supply is inadequate to fully supply power to this radio when the radio is operated to it's full potential.
This radio can pull up to 55~60 plus amps with the amplifier operating.
I use the MFJ power supply below on my bench for radios and amplifiers with up to 4 2879 transistors.

MFJ’s heavy-duty 75 Amp switching power supply is excellent for powering your HF mobile amplifier or your HF and VHF/UHF rigs and accessories.

https://mfjenterprises.com/products/MFJ-4275MV

 

[dave’s delta]

Thank you for detailed responses and links. My 18 year old 70DX Is finally done from the ocean air (used on a boat on the ocean) and the beatin and banging from crashing waves Into the boat. Pretty damn durable radio for the most part. Others have had the same good luck. It’s had to be repaired three times over that time. Not bad for the harsh environment.

Like to bring the radio home in the off-season and the old 35amp sure ain’t gonna cut the mustard. So it’s double purpose.

I will try out the 75amp MFJ. I had been eyeing that one already.