Thanks for the reply Jim. I actually found the exact transformer at Allied Electronics for $12.00! Here's the URL: http://tinyurl.com/2f44f3
- JT On Feb 1, 2008 3:57 PM, JAMES HANLON <[EMAIL PROTECTED]> wrote: > > JT, > > The receiver in that article looks OK. > > You can find all of the parts at Antique Electronic Supply, > www.tubesandmore.com . I checked to be sure that they have the tube > sockets, the octal tube bases for the coils, the 365 pf tuning condenser, > the potentiometers, magnet wire for winding the coils, and a suitable power > transformer. I didn't look, but I'm sure you'll find the tube and the caps > and resistors there as well. As to a power transformer, there may be a > trick to getting one for a reasonable price. AES lists a Hammond > transformer, P-T261G6, which has a 250 volt center tapped secondary at 130 > ma and 6.3 volts, 2 amps. You could run a full-wave diode rectifier from > the secondary and it would work just fine. The bad news is that it costs > $31. They have another transformer you could use on the miscellaneous > transformer page, P-T292, that supplies 140 volts at 100 ma, 28 volts at 20 > ma, and 10.5 volts at 2 amps. If you put a resistor in series with the > filament you could use the 10.5 volt winding. The cost of this transformer > is $18.95. Another possibility if you could find them for less would be to > put two 6.3 volt or 12.6 volt filament transformers back-to-back. Take the > filament voltage off the low voltage winding. Connect the second > transformer's low voltage winding to the first transformer's low voltage > winding as well, and use the 120 volt winding of that second transformer for > the high voltage input to your rectifier. If you could find a couple of > filament transformers in a junque box somewhere, this might be a less > expensive way to go. (Fair Radio Sales sells a 6.3volt, 1 amp transformer > for $5.95 . They are at www.fairradio.com .) > > You will also need a pair of HIGH IMPEDANCE headphones. I don't see > anything listed at AES or Fair Radio, but you can usually pick up something > suitable on ebay. > > Have fun! > > Jim Hanlon, W8KGI ______________________________________________________________ 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.
