[Amps] Transformer-LESS advice

[Ian White GM3SEK]

Rob Atkinson wrote:
>
>Well, Watts Unlimited was owned by W9QQ so if you could contact him, 
>you might be able to get some information about it.
>

W9QQ died a few years ago. The Watts Unlimited company does not seem to 
be active, but the design rights to the HV switcher must still belong to 
somebody.

Although a number of these HV switchers were made, and are possibly 
still in use [1], the design did have some problems. One was the very 
poor output regulation - according to the user documentation, the output 
voltage dropped from 3600V @ 100mA to 2600V @ 1.0A. (We can only 
speculate why the design did not include active voltage regulation; 
there must have been a reason.)

The other major issue was on the 115/230V mains input side, with very 
little filtering and a serious confusion between the mains neutral, 
'chassis ground' and the green-wire earth.


[1] http://www.gare.co.uk/k5and/8877.htm


-- 

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek