You don't make one, you go buy it. It's just a 1:1 mains in/mains out power transformer. You probably need something rated for a couple of KVA. They're not cheap. Run the transformer from a GFCI protected power outlet.
On 01-Feb-11 23:06, Jim Larsen - AL7FS wrote:
While we are on test equipment topics... I have been combing the internet for a building article on isolation transformers and Ground Fault Circuit Interrupters (GFCI). I cannot believe that I cannot find any. It is not even in the ARRL Handbooks I looked at. I want to start working on boatanchor rigs, not to mention my TR4-CW, but everybody says ALWAYS use an isolation transformer and GFCI. Nobody says How to do that. It is assumed that all hams know what an isolation transformer is or how to build one. Somehow I missed that in my 46 years as a ham. Go figure. Google and Bing have failed me. Can any of you help? A URL? A PDF? A .doc file? Thank you. 73, Jim Jim Larsen, AL7FS Anchorage Alaska 907-345-3190 http://www.AL7FS.us/ On 2/1/2011 8:18 AM, TC Dailey wrote: * test gear on MY bench is my trusty Variac. I run mine through an isolation xfmr, a single 117vac outlet. AND plug-in bridge rectifier * Number two is an ANALOG type VTVM - * Number three is my old Kenwood TS-430S (used as a receiver) * Soldering iron AND a soldering GUN - * HP-606A (great signal generator) was analog of course, so I made a minibox with a .1 cap in series with the gozinta and the gozouta - with a pickup loop for a counter - it's easy to zero up that way. _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
-- Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937 825 5032 Amateur Radio G8IFF W8IFF (was KC8NHF 9H3GN), e-mail ni...@ngunn.net www http://www.ngunn.net Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP Club International #385, Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC, GCARES, XWARN, EAA382. _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
