Re: [Hackrf-dev] Max TX power
Why not get an FM Broadcast transmitter? (assuming you have the appropriate license)Have you considered the antenna you would need to do whatever it is you are thinking about? If you want to be a pirate, you could probably build an FM broadcast transmitter for less than the price of a HACK RF. That way, when it is confiscated (or worse depending on where you live) you will lose less money. Geoff From: HackRF-dev [mailto:hackrf-dev-boun...@greatscottgadgets.com] On Behalf Of Mitja kocjancic Sent: Thursday, May 31, 2018 2:20 PM To: Chuck McManis Cc: hackrf-dev Subject: Re: [Hackrf-dev] Max TX power can someone recomend a chep 1 to 100watts amp and filter (preferebly all in one) for FM Broadcast Band (also covering 64 to 76Mhz) 2018-05-31 17:23 GMT+02:00 Chuck McManis : Have you considered a separate power amplifier ? While the HackRF can transmit a few milliwatts of power if you're actually going to use it to transmit something "for real" (rather than just use it for experiments) you might consider getting a filter for the band of interest and a separate power amplifier. That does two things for you, first it prevents the transmissions of spurious signals (harmonics, overtones, etc) that arise from the nature of how the signal is created. Second it lets you accurately control the effective radiated power of your antenna and power amplifier set up and stay within any transmission restrictions for the spectrum on which you are transmitting. As a bonus it protects the output stage of your HackRF from reflected transmission signals coming from mismatched transmission lines. On Thu, May 31, 2018 at 1:35 AM, Matteo Terzi wrote: Hi all, how can I set the maximum TX power of the HackRF? On gnu radio I'm using a "multiply const=6" and the parameter "IF Gain=47" (of the osmocom sink). Any other method or strategies?? Thanks Matteo -- Matteo TERZI Google Gmail Member ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
Re: [Hackrf-dev] Max TX power
can someone recomend a chep 1 to 100watts amp and filter (preferebly all in one) for FM Broadcast Band (also covering 64 to 76Mhz) 2018-05-31 17:23 GMT+02:00 Chuck McManis : > Have you considered a separate power amplifier ? While the HackRF can > transmit a few milliwatts of power if you're actually going to use it to > transmit something "for real" (rather than just use it for experiments) you > might consider getting a filter for the band of interest and a separate > power amplifier. That does two things for you, first it prevents the > transmissions of spurious signals (harmonics, overtones, etc) that arise > from the nature of how the signal is created. Second it lets you accurately > control the effective radiated power of your antenna and power amplifier > set up and stay within any transmission restrictions for the spectrum on > which you are transmitting. As a bonus it protects the output stage of your > HackRF from reflected transmission signals coming from mismatched > transmission lines. > > On Thu, May 31, 2018 at 1:35 AM, Matteo Terzi > wrote: > >> Hi all, >> how can I set the maximum TX power of the HackRF? >> On gnu radio I'm using a "multiply const=6" and the parameter "IF >> Gain=47" (of the osmocom sink). Any other method or strategies?? >> Thanks >> >> Matteo >> >> -- >> Matteo TERZI >> Google Gmail Member >> >> ___ >> HackRF-dev mailing list >> HackRF-dev@greatscottgadgets.com >> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev >> >> > > ___ > HackRF-dev mailing list > HackRF-dev@greatscottgadgets.com > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev > > ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
Re: [Hackrf-dev] Max TX power
Have you considered a separate power amplifier ? While the HackRF can transmit a few milliwatts of power if you're actually going to use it to transmit something "for real" (rather than just use it for experiments) you might consider getting a filter for the band of interest and a separate power amplifier. That does two things for you, first it prevents the transmissions of spurious signals (harmonics, overtones, etc) that arise from the nature of how the signal is created. Second it lets you accurately control the effective radiated power of your antenna and power amplifier set up and stay within any transmission restrictions for the spectrum on which you are transmitting. As a bonus it protects the output stage of your HackRF from reflected transmission signals coming from mismatched transmission lines. On Thu, May 31, 2018 at 1:35 AM, Matteo Terzi wrote: > Hi all, > how can I set the maximum TX power of the HackRF? > On gnu radio I'm using a "multiply const=6" and the parameter "IF Gain=47" > (of the osmocom sink). Any other method or strategies?? > Thanks > > Matteo > > -- > Matteo TERZI > Google Gmail Member > > ___ > HackRF-dev mailing list > HackRF-dev@greatscottgadgets.com > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev > > ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
[Hackrf-dev] Max TX power
Hi all, how can I set the maximum TX power of the HackRF? On gnu radio I'm using a "multiply const=6" and the parameter "IF Gain=47" (of the osmocom sink). Any other method or strategies?? Thanks Matteo -- Matteo TERZI Google Gmail Member ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev