An old trick was to use a single voltage transformer, say 350 CT, using a full wave bridge for the high voltage and the center tapped output for the lower voltage. For instance 350x1.4=490vdc unloaded and (350/2)x1.4=245 vdc unloaded.
You may be happier with a higher transformer voltage and a choke input for the lower voltage. Depends on how critical the load is. If you don't find exactly what you are looking for this may give you other choices. Pat wa4tuk -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of JT Croteau Sent: Wednesday, February 06, 2008 8:23 AM To: Discussion of AM Radio in the Amateur Service Subject: [AMRadio] WTB: HV Tranny Looking for a high voltage tranny with 115V Primary and secondary tapped for both 400V and 700V along with a CT. I may have to go with separate HV trannies but I'd rather not if possible. Power supply I am building produces 230VDC @ 80ma and 475VDC @ 170 ma. Please reply direct, [EMAIL PROTECTED] Schematic of tranny in case I am not describing it properly: http://n1ese.qrpradio.com/tranny.jpg Thanks -- JT Croteau, N1ESE - Manchester, NH (FN42gx) Contest Manager, TARA Skirmish ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.19.21/1263 - Release Date: 2/6/2008 8:14 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.19.21/1265 - Release Date: 2/7/2008 11:17 AM ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
