All, Chris Bartram.
On the subject of noise from a SMPSU – a
long time ago I acquired a Farnell 75amp 28volt unit. Its
located in my loft at the moment, and is also remotely turned
on and off from the shack (long story as to why) As an
experiment last night I connected about 40ft of wire to the +
terminal and ran it round the loft. I could not detect, or
see, any increase in noise on any band (IC-7300) 1.8 –
These PSU’s were obviously made to the
enormous price they fetched when new. No doubt proper design
I also have an Agilent E3648 Lab PSU in the
shack, not sure if SM or Linear but full of digital
stuff.... no interference from that either.
Chris, as I mentioned earlier, don’t buy a
Nissei MS-1228 ‘Professional’ SMPSU..... outputs loads of crap
on HF/Lo VHF. And personally I would not buy one of these
‘tweakable’ SMPSU’s to move sprogs away from the station you
want to work. Had one of these at a club station.... awful !
Colin de G8LBS.
Mail for Windows 10
Chris Bartram G4DGU <chris@...> writes
>Nothing to do with microwaves, except possibly that it
will help me
>sort-out/rationalise my workroom/shack, and thus help
hasten my return
>to having an operational station.
>Does anyone have any (polite!) suggestions regarding a
>20A+ switching PSU?
I bought a used HP ProLiant 750W PSU Power Supply from
year to use /P , rather than lugging a heavy linear supply.
They come in
at about £12 and easy to mod for 13.8V or you can leave them
Http://www.gm0onx.co.uk/ under low cost SMPU
HP ProLiant DL360 G6 750W Power Supply (HSTNS-PD18 version)
They seem quite enough for what I do.
There's plenty of suppliers.