Vic, If your transformer is a true 1 to 1 winding ratio the RMS voltage measurment of both the primary and secondary should be the same. In your case either the turns ratio are not 1 to 1 or you have a shorted turn in the primary winding. If it a shorted turn then even though the actual turns ratio is 1 to 1, if there is a shorted turn in the primary, the electrical turns ratio will not be the same. If you connect the transformer with the secondary as the primary, your output voltage RMS will be lower.
73 Dave KD1NA From: Vic K2VCO <[email protected]> To: Elecraft Reflector <[email protected]> Sent: Sun, August 1, 2010 5:24:04 PM Subject: [Elecraft] Speaking of off-shore manufacture... I just bought a transformer, primary and secondary both spec'd at 120v. My line voltage is 119.5 -- the secondary voltage is -- get ready -- 148v! The only thing I can think of is that this is supposed to be the voltage under load. But I didn't think that transformers were spec'd that way, normally. It's a good thing I'm not building a helicopter or something. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
