There are some old pictures on the link below. http://wa5bxo.shacknet.nu/N2DTS/
A few guys have built the receiver with good results. My own pieced together design based on various handbooks (bill orr mostly). Brett > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Theo Bellamy > Sent: Tuesday, March 07, 2006 9:58 AM > To: Discussion of AM Radio > Subject: [AMRadio] Homebrew Receivers (was: receiver tests for Theo) > > Brett, > > I sure would like to see some pics of your homebrew receiver, > and hear some > more about it's design (tube lineup, if strip, audio section, > etc). I have > never built a receiver. Lots of amps, some cw transmitters, > and lots of > accessories and surplus mods, but no receivers. Did you > design it yourself, > or did you pattern it after a published design (like the > famous HBR series)? > > My requirements are for AM only on 160, 80, and 40, with attractive > "classic" appearance and controls that are pleasing to use. > This is for a > station that will be installed in the den so it can't be an > "ugly mess o' > wires n' boxes". > > Theo K4MO > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Brett gazdzinski > Sent: Tuesday, March 07, 2006 9:36 AM > To: 'Discussion of AM Radio' > Subject: RE: [AMRadio] receiver tests for Theo > > > My recording setup is an old cassette tape deck that happens > to be rack mount. > > The receiver filter is 5.5Kc since my ears don't work well > at high frequencies, so the recording is limited... > > I have never taken an analog tape and converted it to > a digital format. > I would wonder how good a typical sound card would work > converting analog to digital. > > On the subject of picking a receiver, I got tired of > the limitations or flaws of all the commercial stuff, it > seems every receiver is a compromise between cost and function, > some had great audio but you had no idea of the frequency you were on. > Others did SSB very well, and AM lousy. > Some did AM well, and ssb poorly. > Some looked very cool, some were very ugly. > Some drifted, some were stable. > Some were very quiet (old stuff) some were very noisy (new stuff). > Some had good bandwidth choices, others had poor or no > choices. > Some make no provision for TX muting. > > If you don't want to band hop, the r390 series works very well on AM, > although it needs outboard audio and is on the noisy side. > > My homebrew receivers were built to function, I want low noise, > low distortion, accurate frequency readout, 160, 80 and 40 meter > coverage, a xtal BFO for zero beating AM signals, a scope output, > an S meter, and good AM selectivity choices. > As an added benefit, I made it look like the rest of the > home brew stuff, and made it so when you switch bands it goes > from 1880, to 3880, to 7290 when you change bands. > > They SEEM to work well, but I need someone with good hearing > to really nit pick them. > > Eventually, I want to add many bandwidth choices, 4, 5, 6, > and 8Khz maybe. > > Other than the homebrews, I only have the G76 and an Icom 756 pro. > The G76 has audio amp limitations, the 756 is very noisy, and rolls > off the low end even with outboard audio. > There are many times I could not copy signals on the R390a or the 756 > that were good copy on the homebrews, weak signals on quiet bands is > where the homebrews really shine. > > I would think an NC300 or 303 with outboard audio might be reasonable > and sound good. > The R390 series has a scope output built in, and it works well > on receive and transmit. Its got muting, its accurate, but it > is expensive and trouble prone.. > > Just my two cents... > > Brett > N2DTS > > > > > > > > > > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of VJB > > Sent: Monday, March 06, 2006 2:01 PM > > To: amradio@mailman.qth.net > > Subject: [AMRadio] receiver tests for Theo > > > > Theo, > > > > In addition to looking up some AMers around your area, > > I'd recommend asking for some sound files from people > > who can record from the receiver candidates. > > > > This past weekend Brett N2DTS and myself were in QSO > > on 40m with a fellow running a very clean sounding > > DX-100. We both rolled tape on a specific part of the > > guy's transmission. Brett if you still have that sound > > file, maybe render it down to an MP3 and I'll do the > > same? > > > > We can then describe receivers. > > > > Meantime, there are some other sound files kicking > > around that are worth downloading. I've got a few that > > I remember what receiver I used: > > > > >From the diode of an SP600 at 13Kc selectivity: > > http://www.wa3vjb.com/sound/HUZ-FT102%20(2).mp3 > > > > >From the diode of an R390 at 16kc selectivity: > > http://www.wa3vjb.com/sound/W2DTC-doodler.mp3 > > > > >From the "line output" of an R390A at 8Kc: > > http://www.wa3vjb.com/sound/W0VMC.mp3 > > > > Steve, WB3HUZ has a pile o' files too: > > http://www.amwindow.org/audio/htm/audio.htm > > > > Here is the sound of a 51S-1F up on 10 meters AM: > > http://www.amwindow.org/audio/mov/f5hsh.mov > > > > > > In addition, check this batch of wav and MP3: > > http://www.amfone.net/audio/ > > > > These will give a continuum of sound quality for sure. > > > > Paul/VJB > > > > > > > > > > > > > > > > > > > > > > __________________________________________________ > > Do You Yahoo!? > > Tired of spam? Yahoo! Mail has the best spam protection around > > http://mail.yahoo.com > > ______________________________________________________________ > > AMRadio mailing list > > Home: http://mailman.qth.net/mailman/listinfo/amradio > > Help: http://mailman.qth.net/mmfaq.html > > Post: mailto:AMRadio@mailman.qth.net > > AMfone Website: http://www.amfone.net > > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb > > > > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb > > > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb >
