<head><style>body{font-family: Geneva,Arial,Helvetica,sans-serif;font-size:10pt;font-family:arial,sans-serif;background-color:#ffffff;color:black;}p{margin:0px}</style></head><body id="compText">It seems to me that Ameratron has a 48 volt power supply for one of their Linear Amps not sure of cost but should(?) have filtering for HF range.<div>Tim W4YN<br><br><br><blockquote style="PADDING-LEFT: 5px; MARGIN-LEFT: 0px; BORDER-LEFT: #0000ff 2px solid">-----Original Message-----
<br>From: Erich Heinzle <vk5hse@yahoo.com>
<br>Sent: Jul 26, 2010 1:53 AM
<br>To: hpsdr@lists.openhpsdr.org
<br>Subject: Re: [hpsdr] 48V DC PSUs
<br><br><table cellspacing="0" cellpadding="0" border="0"><tbody><tr><td valign="top" style="font: inherit;">Just thinking out loud here,<br><br>a cheap arc (a.k.a. stick) welder should give up to (adjustable)<br>45V AC at up to 100A intermittent and 50A continuous quite<br>cheaply.<br><br>Add some admittedly expensive diodes/capacitors+/-regulators,<br>and you have a pretty beefy PSU for a linear PA.<br><br>I'm not sure about leakage/magnetizing currents (i.e. efficiency)<br>etc.. though.<br><br>The money you save could then pay for the hernia surgery....<br><br>Cheers<br><br>Erich<br>VK5HSE<br><br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><div class="plainMail">While researching Harris TV amp modules i came across the site of k3hkr <br><a target="_blank" href="http://k3hkr.com/HARRIS101.html">http://k3hkr.com/HARRIS101.html</a> who recommended HP server 50V 57A psus. I <br>got one for $30 and it works fine
although as currently built its probably <br>not OSHA compliant! <br><br>> Does anbody know if we might modify some of the larger PC switched mode <br>> psu for 48V as the DC source?<br><br></div></blockquote></td></tr></tbody></table><br>
</vk5hse@yahoo.com></blockquote></div></body><pre>
Tim O'Rourke
W4YN@ARRL.Net
Low Power Amateur Radio Rocks
Member of Flying Pigs,ARCI,GQRP,RSGB,ARRL Life Member
NHRA Life Member</pre>
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