[Elecraft] PS Comparison: Powerwerz SS-30DV vs. MFJ-4230MVP

[Andy Durbin]

The MFJ-4230MVP, Powerwerx SS-30DV, and Powerwerx SPS-30DM appear to be three of many variants of the same basic power supply.  I have the Jetstream JTPS31MB which seems to be one of the same family.  It has several different "punch-outs" to allow it to be produced in several different configurations.    I expect they all come off the same production line.

I have been running this power power for over 6 years to power my TS-590S and a few ancillaries.  It was worked well but there have been a few issues:

* The fan became very noisy.  This was fixed by relaxing the securing bolts and placing thin spacers between the fan and the rear panel. 
*  There is also no provision for isolating the negative side of the supply from ground.  My attempts to provide that isolation had unintended consequences so I removed the mod.

My guess is they are all the same inside and the choice should be made based on preference for metering, voltage adjustment, and terminal configuration.

Andy, k3wyc