dswelch51964
Newbie
- Joined
- Feb 17, 2020
- Messages
- 2
after weeks a testing, playing and researching problems, i feel good saying it works great with sdrtrunk, better than the newest rtl-sdr dongles.
with the new software fix for extra noise now working and new exterior antenna installed (not even high yet - 10') all is working better than ever.
using 12mhz base band i get the full freq. assigned to our P25 systems here in the metro area. We have 3 major systems. I just wished i had a faster laptop to increase channels, systems and traffic pools.
I keep the graphics displays running by setting the FFT width to 512 and Frame Rate to 14. it helps with CPU load a little. If i disable it I can get additional traffic pools or systems without buffer overruns.
I do keep the antenna gains a little on high side to pickup the weakest system i monitor, so you see some noise, but doesnt hamper the reception at all. I cant explain the higher noise levels at the lower end yet (around 850-851mhz)
Price-wise basic Harckrf is $74 & 10Mhz tcxo crystal $9 shipped out of china (no other accessories needed). Hackrf 25mhz-6ghz
LTE exterior antenna $16 (tested) this antenna is probably nothing more than a tuned PCB inside the plastic, but I have tested and it works great.
Hackrf total $90 (and its a cool toy with accessories and portapack, but not needed for sdrtrunk)
if you purchase 3-4 rtl-sdr V3 youll be paying at least $22 each for them and will need 3 antennas.Total $66 limited to 25mhz~1.7ghz
I did find my Green case v3 for $15 shipped from china. I bought mine on ebay $22 each. The silver (real) rtl-sdr.com version is best to buy and specs.
3 exterior antennas will be at least $30+
rtl-sdr total is $96
New tests of Hackrf below with exterior antenna with 12mhz BB monitoring 2 systems running and total of 6 traffic pools keeping the screen smooth and buffer overruns to zero.
with the new software fix for extra noise now working and new exterior antenna installed (not even high yet - 10') all is working better than ever.
using 12mhz base band i get the full freq. assigned to our P25 systems here in the metro area. We have 3 major systems. I just wished i had a faster laptop to increase channels, systems and traffic pools.
I keep the graphics displays running by setting the FFT width to 512 and Frame Rate to 14. it helps with CPU load a little. If i disable it I can get additional traffic pools or systems without buffer overruns.
I do keep the antenna gains a little on high side to pickup the weakest system i monitor, so you see some noise, but doesnt hamper the reception at all. I cant explain the higher noise levels at the lower end yet (around 850-851mhz)
Price-wise basic Harckrf is $74 & 10Mhz tcxo crystal $9 shipped out of china (no other accessories needed). Hackrf 25mhz-6ghz
LTE exterior antenna $16 (tested) this antenna is probably nothing more than a tuned PCB inside the plastic, but I have tested and it works great.
Hackrf total $90 (and its a cool toy with accessories and portapack, but not needed for sdrtrunk)
if you purchase 3-4 rtl-sdr V3 youll be paying at least $22 each for them and will need 3 antennas.Total $66 limited to 25mhz~1.7ghz
I did find my Green case v3 for $15 shipped from china. I bought mine on ebay $22 each. The silver (real) rtl-sdr.com version is best to buy and specs.
3 exterior antennas will be at least $30+
rtl-sdr total is $96
New tests of Hackrf below with exterior antenna with 12mhz BB monitoring 2 systems running and total of 6 traffic pools keeping the screen smooth and buffer overruns to zero.
