[Hackrf-dev] FM Repeater

[Quentin Smith]

A relay could never switch at 76 MHz.

You could build a Class E amplifier out of an H bridge, I suppose, but you 
would need additional components (large capacitors and inductors for 
tuning).

Why bother when you have an actual radio in the form of the HackRF?

--Quentin

On Sun, 12 Jul 2015, Mitja kocjančič wrote:

> what about H-Brigde or a Relay (could I amplifie a signal with it?) (I have custom made H Bridge with chips and you can connect a power suply to it and drive motors but I don't know if they can amplifie a signal with it (and
> there is another problem that I can only transmitt in European FM Band with Raspberry Pi (I would like to transmitt on 76 Mhz (because Japanese FM Band is enpty here in Slovenia)
> 
> 2015-07-12 19:54 GMT+02:00 Russell Handorf <rhandorf at handorf.org>:
>       And filter your pi, it is a very nasty transmitter.
>
>       -------- Original message --------
>       From: Quentin Smith
>       Date:07/12/2015 1:40 PM (GMT-05:00)
>       To: Mitja kocjančič
>       Cc: hackrf-dev
>       Subject: Re: [Hackrf-dev] FM Repeater
>
>       There's nothing stopping you from transmitting FM+RDS with a HackRF,
>       except possibly someone hasn't written the software yet.
>
>       It sounds like what you really want is a power amplifier, though. Even the
>       HackRF will not be particularly strong (~10 mW at FM frequencies).
>       (Honestly, for the kind of power output you can get from an RPi, you might
>       want a preamplifier instead.)
>
>       --Quentin
>
>       On Sun, 12 Jul 2015, Mitja kocjančič wrote:
>
>       > Hi I am using Raspberry Pi to transmitt FM Radio on 87.8 Mhz but the range is realy poor (I don't want to use HackRF for this because I can't change RDS on air (with RPi (Raspberry Pi) I can change RDS via stdin
>       pipe)
>       >
>       > So I would like to recieve that station with RTL-SDR Dongle and then retransmitt it with HackRF on 76 MHZ
>       >
>       > Anyone know how I can do that?
>       >
>       > Best regards and thanks for Anwsering 
>       >
>       >
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> 
>