[TenTec] TenTec Digest, Power Supplies slightly off topic

[John Molenda]

OT     The power werx SS dv30 was recommended to me by the emergency 
comm guys at the club .  I bought two .  Can anyone rate these for me ?  
Are these problematic with causing noise ?  thanks  John kb2huk
On 9/8/2012 2:39 AM, Rick - DJ0IP / NJ0IP wrote:
> Jim, that's why the league tests switcher power supplies for trash.
> All you have to do is read the reviews and buy a good one.
> You always get trash when you buy cheap, no matter what it is!
>
> 73,
> Rick, DJ0IP
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of N4be_Jim
> Sent: Saturday, September 08, 2012 4:03 AM
> To: tentec at contesting.com
> Subject: Re: [TenTec] TenTec Digest, Power Supplies
>
>> 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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