I am in need of a 102w multiple voltage output transformer to power a spectrum analyzer. The specifications are:
Primary: 120v@1A
Secondary: 5v@5.25A
12v@1A
+15v@2.2A
-15v@2A
Can you assist?
Paul M.
We can certainly look for options that match those specs.
Would you have information on.
Mounting
–Would this be sitting on a bench? or would you like din rail or panel mount, etc?
Connection / termination
–Would you be wanting to hardwire to and from this?
Also to verify.
- Power supply or Transformer?
–As generally transformers provide and AC voltage.
–While some power supplies can they are more commonly DC voltage outputs.
—example power supply 364-1267-ND
https://www.digikey.com/en/products/detail/tri-mag-llc/L6R12-090/7682630
—example transformer 237-1081-ND
https://www.digikey.com/en/products/detail/triad-magnetics/VPP10-500/242525
Would you have any other details you would like this item to have?
Nathan:
Thanks for the rapid reply.
-This would be part of an external power supply redesign for a spectrum analyzer which was originally designed using a SMPS which, as it aged, is now creating buzz saw interference above 20Mhz. Not good for a spectrum analyzer.
-Bench mounting is fine. Leads or lug terminals are fine.
-I would prefer a toroidal xfmr but this is not carved in stone.
You’d want to shop in the Power Transformer family then, and use multiple units to create your required supplies. 60Hz transformers for 5/12/±15 are all but extinct at this point.
Couldn’t tell ya for sure in your specific case, but it’s plausible that supply sequencing may be an issue that causes bigger problems if not respected.
Electrolytic filter caps will tend to show an increased ESR with age, that’ll manifest as increased ripple/noise. Might be worth your while to look at just replacing those, rather than building an entirely new supply.