Well explained Nick. It's really a lot of effort to use any type of HF switcher with a TRF receiver in close proximity.
As an alternate to the back-to-back transformer, you could assemble an inverter to drive the center tapped output of a small transformer in reverse at ~60-80 hz. I assembled a few of these years ago to generate the B+ voltage for small tube radios, tucked inside their original B+ battery skins. http://www.qsl.net/wb4tur/images/g1.gif Although it's an older design, the concept is easy to understand. A stable fixed-frequency could be produced using a small 10F200 series PIC processor switching a pair of small FET's. Regards, Jeff -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
