Just a quick example. In order to achieve a flat passband of 3 kHz you may really need an amplifier whose bandwidth is 10 or even 20 kHz. To achieve this, you probably can't use just one single stage of audio amplification with a simple emitter bypass electrolytic capacitor, you'll need several stages of Class A (both DC and AC bias stabilized) thereby raising the costs significantly. Precision components will be used rather than run of the mill 10% tolerance. It all adds up both in cost and performance. Jim WA0LYK --- In digitalradio@yahoogroups.com, "DuBose Walt Civ AETC CONS/LGCA" <[EMAIL PROTECTED]> wrote: > > Which could (probably does) account for the higher price of commercial HF communications radios. So why do Codan radios cost so much more than say the ICOM IC-F7000? > > Walt/K5YFW > > -----Original Message----- > From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] > Sent: Thursday, September 21, 2006 9:05 AM > > [stuff deleted] > > I know from experience trying to build transmitters and receivers, > that it is difficult to meet some of the conditions needed to > achieve optimum results. I don't have a lot of faith that the ham > manufacturers you mention have done this in what really are very > inexpensive radios. Even less faith that everyone periodically does > detailed maintenance checks to insure that everything is operating > as designed. > > Jim > WA0LYK >
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