> 
> I use only linear supplies where possible.  I couldnt care less about 
> efficiency.  Why?  Ever listen to the trash a cheap switcher puts out on HF?  
> Unless well designed and filtered, a switching supply will raise the noise 
> floor several S units.  Yes there are decent ones but i would rather not 
> worry about it.  Yes TT makes decent switchers, such as for the Orion, but 
> ever hear one of those when the fan kicks in?  In my area a great deal of HF 
> hash in generated by all the cheap Chinese supplies that dont adhere to our 
> EMI standards, but we still accept their imports. No I will take my Astron 50 
> amp 12 vdc supply any day.  It runs my O2 and Harris RF-3200E quite easily 
> while loafing along.   Jim N4BE
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