I went to get a qst at the book store, but they only had 73 magazine. HRO always has copies, but they are too far away when work is so busy.
I built regens when in jr high, but rate them as fun projects, not really a receiver to use in qso,s. They use regeneration to gain selectivity, and gain, but the selectivity curve for serious ham work is poor. They sure were fun to build tho, I got my first circuit out of some encyclopedia, used a 6SN7, interstage transformer, and batteries. I got some parts at general radio in Camden, out of business a long time now, but great in their day. You could walk in and get anything, if you had money. I had no money, and now, when I do have money, they are closed! I remember my regens working well basically, and rebuilt the same circuit in various cabinets and mods many times. I finished the detector and agc in the 2nd home brew receiver, and tried some other things, increasing the high voltage to 200 volts, but had problems with oscillations and noise, mostly removed by changing some circuit values like a cathode resistor in an IF amp. I have problems injecting the agc voltage into one IF amp, the one after the filter, so left it off. I may play around with that some more later. Conditions on 80 are still lousy, no good strong signals. I am very surprised my antennas are still up in the high winds, the 80 meter dipole has 8 year old rope holding it up! Brett N2DTS > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] > Sent: Thursday, November 13, 2003 2:35 PM > To: [email protected] > Subject: Re: [AMRadio] EUREKA!!! It WORKS!...(Two tube Superhet.) > > > I'm sure many subscribers will remember the two-tube superhet circuit > described in QST and several Handbook editions back in the > 40s. Essentially a dual > triode (6SN7, 6C8, 6F8, etc.) regenerative > detector/single-stage audio amp > setup preceded by a 6K8 (triode hexode) converter. The "IF" > frequency was > around 1700 kc. Big advantage here over more simple regen > designs was the > isolation from antenna effects provided by the converter > stage. Built one of these > for 80M back in the 50s when I was a kid. Worked quite well > as I remember. > > Dennis D. W7QHO > Glendale, CA > > > > --- StripMime Report -- processed MIME parts --- > multipart/alternative > text/plain (text body -- kept) > text/html > The reason this message is shown is because the post was in HTML > or had an attachment. Attachments are not allowed. To learn how > to post in Plain-Text go to: http://www.expita.com/nomime.html --- > _______________________________________________ > AMRadio mailing list > [email protected] > http://mailman.qth.net/mailman/listinfo/amradio
