Anyone using the transverter solution from Rene, PE1CMO?
-
-
HB9RYZ Perfect Wolfgang.. just saw it on Amazon with USB Soundcard... Very fine for using with the Pluto.. Thanks for sharing your experience.. here the link to Amazon:
https://www.amazon.de/Neewer-P…chelle/dp/B076HMFM2M?th=1
Nice long weekend Heiner...
-
-
Talking about Microphones, how about Headphones with 6.3mm jack plug?
We will have our QO-100 station with DL50AMSAT running at the AMSAT-DL booth at the HamRadio2019 in Friedrichshafen. The noise in the hall will be very high... any recommendation?
I think it will be very noisy two ways: you audio transmitting, and but also the sat signal will not be understood well with much background. One of the cool things with QO100 is that almost all signals have 15-20dB s/n and about the same signal strength, making them very easy to understand. But the ham-made QRM in the messe will kill that.
I wonder if there are people with an airplane license on this form who can make a recommendation or two..
-
Hi All
I'm using a BOSE Headset for RX and the Studio-Mic for TX.
Definitively a good choice in the shack. But at the ham-radio with that QRM in the background a good headset and the Antlion ModMic V4.
https://antlionaudio.com/products/modmic-4
73 de HB9RYZ
Wolfgang
-
-
Thanks Heiner and Wolfgang,
I will delete the postings as they are in the wrong forum anyway and I know now where to look.. 73s Peter
-
Hi All
I mad some modification (bypass) at my PE1CMO Transverter in order to use my SDRPlay RSP2Pro SDR-Receiver at the LNB-Entry point to see the whole SAT scope on my PC with SDR Radio COnsole v3.0.9 and to avoid TX-interference while I'm sending in full SAT duplex mode with the ICOM IC-9700.
Modification
At the LNB-Entry point of the transverter use an 1nF capacitor and a 220 Ohm resistor in sequence and then connect the SDRPlay.
The SAT scope with the SDRPlay is now showing 739.xxx.xxx. Before the SDRPlay was connected over a splitter at the down-link 144 MHz output which gave me radio interference while I was sending on 70 cm. This is no gone :-).
Freq. Overview:
SAT Transponder: 10'489'725 MHz
SDRPlay: 739'725 MHz
IC-9700 TX (UP): 431'725 MHz
IC-9700 RX (Down): 144'725 MHz
so everything is now in line and synchronized with the Leo Bodnar 2-Port GPSDO. The Transverter (10 MHz) and the SDRPlay (24 MHz) is connected to the GPSDO.
So I can operate now with three different modes:
1. Using only the IC-9700 in SAT full duplex mode (no SDR, etc.)
2. Using the IC-9700 to send an listen with SDR Radio Console on the PC
3. Using the IC-9700 to send an listen with the WebSDR in Goonhilly
73 de HB9RYZ
Wolfgang
-
Hello,
does anybody know where at the receiving chain (before the receiving mixer) a sdr rx can be connected in parallel to the transverter solution from Rene?
73 Andreas
I did this. Drilled a BNC-flange in the casing and tapped the IF via 1 nF.
-
Hi All
IC-9700 News regarding ext. REF-IN (GPSDO)
http://www.icom.co.jp/world/su…wnload/firm/IC-9700/1_10/
Review from Stewart, ZL4DC
The firmware update was successful from v 1.06 to v 1.10. Hint... the final firmware update "OK" button requires a long press to activate; well at least it did in my case.
So before I implemented the new "Sync to REF IN" function I measured the frequency at 1296.6 MHz (FM carrier no audio) using my Anritsu S412E (with built in GPS - GPS locked hi accuracy reference). It was 12 Hz low and wondering around a bit (most disturbing); mostly seems to depend on the temperature of the IC-9700 which of course depends on the transmitter power and duty cycle.
After activating the "Sync to REF IN" (using an external 10 MHz GPSDO) and transmitting again the frequency was 1296.6 MHz ± 2 Hz over time.
From a cold start; IE. turn the radio on and start transmitting immediately after it has booted the radio started about 8 Hz high and slowly drifted down to 1296.6 MHz, I continued to transmit on high power until the radio timed out (10 minutes). The maximum frequency deviation was only 2 Hz but mostly the frequency stayed within 1 Hz.(Does anyone know what the allowable/acceptable/recommended level of 10 MHz reference input to the IC-9700? It's not in the manuals so I'm using the IC-7610 value with is quoted at -10 dBm.)
This is a vast improvement on the initial offering. Finally I can sleep at night now.
PS. After reloading all of the settings from the SD card I was immediately able to remote control the IC-9700 with Icom's RS-BA1 V2 software; IE. I didn't have to tweak anything at all to get it going. Well done.
73 de HB9RYZWolfgang
-
I mad some modification (bypass) at my PE1CMO Transverter in order to use my SDRPlay RSP2Pro SDR-Receiver at the LNB-Entry point to see the whole SAT scope on my PC with SDR Radio COnsole v3.0.9 and to avoid TX-interference while I'm sending in full SAT duplex mode with the ICOM IC-9700.
Modification
At the LNB-Entry point of the transverter use an 1nF capacitor and a 220 Ohm resistor in sequence and then connect the SDRPlay.
Apologies for resurrecting an older thread, but I tried this SDR-tap on the CMO transverter and there is a problem.
The default configuration of the CMO transverter kit is for a 70cm backend transceiver for TX and RX (I use SDR console as bandscope and to monitor my signal)
Wolfgang's transverter has a special configuration (70cm up, 2m down) and the modification works there.The default CMO transverter configuration has a low-noise PLL generating 307.5 MHz that is used to mix 739 MHz from the LNB to 432 MHz for the transceiver. There is switching and attenuation but there is no absolute isolation between TX and RX path.
The problem is that when the 70cm backend transceiver generates RF, the 432 MHz mixes with 307 MHz resulting in a strong signal on 739 MHz at the port connecting the LNB. That signal is very strong, it blocks the input of the SDR receiver.
I have fixed this by, during transmit, switching off the DC power to the 307 MHz oscillator. By removing the 307 MHz LO, the strong 432 MHz signal doesn't mix to 739 MHz and SDR monitoring now works. Using a transistor to short C87 (with a series resistor, please!) and the oscillator stops.
I still use a dualport-LNB but I no longer need the 2nd LNB port for monitoring
73, Geert Jan PE1HZG
