[hpsdr] thor

[Orval Chadsey]

Hi Everyone,

Having spent almost 20 years in consumer electronics service, I can
assure you that all modern audio and video products run the mains
through RFI filters and straight into diodes for the "HOT" primary side
of a switching supply.

73 de N6OZI
Orval
San Francisco, California

-----Original Message-----
From: Steven Doyle <steve_doyle at o2.co.uk>
To: hpsdr at openhpsdr.org
Subject: Re: [hpsdr] thor
Date: Fri, 21 Aug 2009 09:22:37 +0100
***** High Performance Software Defined Radio Discussion List *****
Hi Alex,
We are considering rectifying striaght off the mains, but the prototype has 
a transformer, noise issues asside the main reason being the voltage at the 
FET drain can typically reach 3-4 times the supply voltage which exceeds the 
break down voltage of most of the popular power FETS. We are using a 120VDC 
supply in the prototype.
I wasn't aware of any legal issues with rectifing stright off the mains. I 
will investigate this.
73s
Steve
G1YLB

>> Hi Alex,
>> I don't know about the US, but in Australia I think it is illegal to
>> rectify the mains directly. There must be a transformer first.
>> Murray VK6HL



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