Hi Chris, Your URL sounds incorrect (404)
Best regards Gérard/F6EHJ Chris Hirt a écrit : > Dear Mr. Tasic-Tasa > > I look at http://www.qsl.net/yu1lm/homebrew.htm. > <http://www.qsl.net/yu1lm/homebrew.htm.> Great!! > Thanks for puplishing Your fantastic job of Your SDR experiments with > 4066 and 4053 switches (my own QSD experiments are at > http://home.pages.at/chirt/HDR2005.htm. > <http://home.pages.at/chirt/HDR2005.htm.>) > > Mostly of the homebrew SDR receivers have a bias voltage 1/2 of the > Vcc. In Your ADTRX1 You also divide +5V / 2 = 2,5 V. Do You test other > bias voltages or is this bias the best for the 74HC4053 ? My own > experiments shows a great performance sensitivity dependent of this > voltage. > > 73 > Chris > > --- In [email protected] > <mailto:soft_radio%40yahoogroups.com>, "Tasic Sinisa" <[EMAIL PROTECTED]> > wrote: > > > > Hello SDR OMs, > > > > I uploaded 4 new SDR designs. All 4 new designs are based on use > 74HC4053 IC > > as S/H (sample and hold ) element in demodulators , modulator and > > transceiver. > > > > 1. SDR HF I/Q S/H (Sample and Hold) Receiver-DR3X from 30 kHz-35 MHz > for 3 > > bands harmonically related with 1(one) oscillator or 1 XTAL > > > > 2.SDR HF I/Q S/H (Sample and Hold) Receiver - DR2B from 30 kHz- 35 > MHz > > with external LO (local oscillator) > > > > 3.SDR HF I/Q S/H (Sample and Hold) Mono band Receiver - DR2C from 30 > kHz- 50 > > MHz with LO (local oscillator) at receiving frequency > > > > 4. Low power SDR HF I/Q S/H (Sample and Hold) transceiver- ADTRX1 > from 30 > > kHz-35 MHz with external LO- part1 > > > > VY 73/72 and GL in SDR homebrew Tasa YU1LM/QRP > > > > www.qsl.net/yu1lm > > > > > --------------------------------------------------------------------------------------- > Orange vous informe que cet e-mail a été contrôlé par l'anti-virus mail. > Aucun virus connu à ce jour par nos services n'a été détecté. > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
