[ARC5] Power Supplies for the ARC-5 Rx...and others.

[hwhall at compuserve.com]

 If someone would like, I have a couple of small Triad isolation transformers, model N-48X, that could serve in a small power supply. They are rated 115v pri & sec, shielded between pri & sec, and load is rated at 15va. The frame is 2 5/16 by 2 inches and they resemble small filament transformers. Pri & sec leads are about 7 inches long.  $9 each plus shipping (just what I paid for them).

Wayne
WB4OGM


 

-----Original Message-----
From: Glen Zook <gzook at yahoo.com>
To: kgordon2006 <kgordon2006 at frontier.com>; Arc5 <Arc5 at mailman.qth.net>; Bob Macklin <macklinbob at msn.com>
Sent: Sat, Jan 29, 2011 12:34 pm
Subject: Re: [ARC5] Power Supplies for the ARC-5 Rx...and others.


You can also wire a couple of appropriate filament transformers "back to back" 
(using the filament winding for the common connection).  Take the 
heater/filament voltage from the common connection and then use the primary of 
the transformer that is NOT connected to the AC mains as the "high voltage" 
transformer.  With a full wave bridge rectifier this will give you plenty of 
voltage to run the receiver.

I have several power supplies made as such that I use for tube-type VHF 
converters, small receivers (i.e. ARC-5), etc.

Glen, K9STH

Website:  http://k9sth.com


--- On Sat, 1/29/11, Bob Macklin <macklinbob at msn.com> wrote:

Consider that a 120VAC isolation transformer with a bridge rectifier and a 
capacitive input filter will give you about 170VDC.
 
You could use one of these with a 12V or 24V transformer for the filaments.


      
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