on5dre QO100 Es'hail setup скачать в хорошем качестве

on5dre QO100 Es'hail setup

This is my (portable) setup for the narrowband section of the QO-100 es'hail satellite. Based on a transverter made by Rene, PE1CMO, and a POTY feed into a 70cm offset dish. The box outside, at the rear of the dish contains the transverter, a 24V 5A PSU and a 12V 2A PSU. The transverter connects to a modified LNB (Octagon 27MHz) who had it's crystal removed, so the transverter can inject a stable 27MHz reference via the same 75ohm coax cable. In TX, the transverter has a built-in power amplifier of maximum 20W, who has a lot of head-room. I use a short run of RG214 to connect to the feed. The transverter converts the 740MHz RX frequency to 432MHz ; in TX the transverter converts from 432MHz to 2,4GHz. The transverter can be locked with an external 10MHz reference. I use a sperate boxed and isolated 10MHz OCXO, wich I calibrated on a rubidium counter, and checked it's accuracy with a GPSDO. I gave the OCXO a 10MHz bandpass filter, because the original output signal is square wave. The OCXO is stable after 5 minutes. The small box indoor next to the IF radio has a small PSU of 13,8V 5A, to feed the IF radio.On it's front it has an Ampère meter to check the load on the internal PSU, and a Watt meter. This meter is connected to the directional coupler of the 2,4GHz PA. Also PTT switching is retreived from the IF radio, and is send to the transverter. Between the inside box and the outside box is only one cable. I use 7 wires inside : 2 wires for 230V ; L and N PTT POWER measurement the other 3 wires are for the GROUND connection Things to do: calibrate the POWER meter. make more QSO's. Hope to hear you soon on the satellite! Kevin ON5DRE - JO20KW ( thanks to Jerry ON4CJQ for the dish and help during tests. )