Google And if we replace our IC202 (Suite 1) André Jamet F9HX This proposal was sweet with effects, verbal encouragement on 10 GHz during contacts, telephone exchanges and letters. It therefore seems that this replacement interests the Hyper OM, and perhaps others. Here are the suggestions received: -de F1ATY: Doubts expressed on AGC which should not affect sensitivity to weak signals; VXO with a large frequency variation, such as on the IC-402; Copper-shaped plywood box inside. - De F6CWN: does not fall into the defects of devices such as the FT290 with its bad dynamics, its birdies, its too small buttons, the loudspeaker too weak. It is necessary: working from 10 to 16 V; Protection against polarity inversion; SSB/CW: Stathery box; loudspeaker protects against water; 0.3 to 3 W HF, adjustable; Side Tone CW: Integrated sequencer (option) including CW: readable frequency night and sun; Robustness: aluminum box, two side handles, weather proofing by o-rings, the apparial must be able to fall; Headphone socket without loupspeaker cut; Outdoor loudspeaker socket; Integrated keyer with Beep-Beep or EPROM; frequency variation of 144 to 146 in twice 1 MHz (encoder or 10 turn potentiometer); RX / TX switching by diodes; Laughs with signaling; flashing red light; TX, green: RX; linear S-meter; Aurel modules for connection 433 MHz wireless with a micro-card 8.35; BNC connector; below: waterproof loudspeaker, below: photo tripod and VELCRO fixing; VFO: CV or diving nucleus, or two concentric tubes, or diode Varicap with a 10 turn potentiometer, double for listening to beacons. -F1BJD: Let's propose presentation to transceive simple and version with PA. Here are my comments and the progress of my work. Be careful not to make a "gas factory". So, not too much annexed circuits or, as optional. For the box, see the sketch which gives a robust and simple solution. VFO or VXO: But required analoge solution (noise from synthesizers). The IC-402 system reminds me of the two-quartz solution in parallel which gives a great frequency variation [1]. For the S meter and the AGC, there are circuits such as AD 8307 to 90db of dynamics which could help us (binding from S1 20nV to S9 +40 dB 0.5 mV). For the QSJ, it does not get "giving" and 1200/1500 Fr, used IC 202 market price, seems suitable, if you do not want to deprive yourself of up to date components. This project not born a "hack" made with drawer funds. In order to test the Weaver method [2], I made the acquisition of a quadrature modulator I/Q and a quadrature I/Q from Mini-Circuits. Associated with the modules described by S53MV in Dubus [3], I therefore make an experimental transceiver 144. For the moment, the TX PERTIE works with weakening of the carrier and the BLI of the order of 30 dB, as the manufacturer of the modulator gives. It is far from the 40 dB of IC 202, but is it enough? The RX part will be tried in the coming month. Here are the news on our project that we will call Y2K, as F1BJD offers, or 2000 simply with 2 for two meters and 2000 for our close future? [1] Technical Topics, G3VA, The Super VXO. Radcom June 1988 Crystal Oscillators and Vxos, Radcom, September 1998 More on Crystal Oscillators and VXOS, Radcom, October 1998 [2] Weaver Method of SSB-Generation, DJ9BV, DUBUS 3/1997 [3] No-Tune SSB Transceisvers for1.3,2.3.5.7 and 10 GHz, S53MV, DUBUS 3/97, 4/97 and 1/98 yandex And if we replace our IC202 (suite 1) André Jamet F9HX This proposal has been successful, verbal encouragement on 10 GHz during contacts, telephone exchanges and letters. So it seems that this replacement is of interest to the OMNI, and perhaps others. Here are the suggestions received: -from F1ATY: doubts expressed about the AGC which should not affect the sensitivity to weak signals; VXO with wide frequency variation, such as on the IC-402; box in curved copper plywood inside. - from F6CWN: does not fall into the shortcomings of devices such as the FT290 with its poor dynamics, its birds, its buttons too small, the HP too weak. It is necessary: on from 10 to 16 V; protection against reverse polarity; BLU / CW: stretch box; HP protects against water; 0.3 á 3 W HF, adjustable; side tone CW: integrated sequencer (option) including CW: readable frequency at night and in the sun; robustness: cast aluminum box, two side handles, O-rings, the device must be able to fall; headphone jack without cut HP; external HP jack; built-in announcer with BEEP-BEEP or EPROM; frequency variation of 144 á 146 in two times 1 MHz (encoder or potentiometer 10 turns); RX / TX switching by diodes; RIT with signaling; flashing red light; TX, green: RX; S linear meter; AUREL modules for connection 433 MHz wireless with an 8.35 headset microphone; BNC on the HF'bottom side: waterproof HP, below: photo foot and Velcro attachment; VFO: CV or plunger core, or two concentric tubes, or varicap diode plus ten-turn potentiometer, double for listening beacons. -F1BJD: let' propose presention for simple transceiver and version with PA. Here are my comments and the progress of my work. Be careful not to make a "gas plant". So, not too many auxiliary circuits or, as an option. For the box, see the sketch which gives a robust and simple solution. VFO or VXO: but analocal solution necessary (noise of synthesizers). The IC-402 system reminds me of the solution of the two quartz crystals in parallel which gives a large frequency variation [1]. For the S meter and the AGC, there are circuits such as AD 8307 with 90dB of dynamics that could help us (linear range from S1 20nV to S9 +40 dB 0.5 mV). For the QSJ, it does not leak "butt" and 1200/1500 Fr, the market price of the second-hand IC 202, seems appropriate to me, if we do not want to deprive ourselves of up-to-date components. This project is not a "hack" made with drawer funds. In order to test the Weaver method [2], I acquired an I/Q quadrature modulator and an I/Q quadrature demodulator of Mini-Circuits. Associated with the modules described by S53MV in DUBUS [3], I am therefore making an experimental 144 transceiver. For the moment, the TX pertie works with attenuation of the carrier and the BLI of the order of 30 dB, as given by the manufacturer of the modulator. This is far from the 40 dB of the IC 202, but is it enough? The RX part will be tried in the coming months. Here is the news about our project that we will call CJ2 k, as proposed by F1BJD, or 2,000 simply with 2 for two meters and 2,000 for our near future? [1] Technical Topics, G3VA, The Super VXO. Radcom June 1988 Crystal Oscillators and VXOs, Radcom, September 1998 More on Crystal Oscillators and VXOs, Radcom, October 1998 [2] Weaver Method of SSB-Generation, DJ9BV, DUBUS 3/1997 [3] No-Tune SSB Transceivers for1.3,2.3,5.7 and 10 GHz, S53MV, DUBUS 3/97, 4/97 and 1/98 Hyper No. 44 page 9