[Hackrf-dev] MGA81563TR1G alternate

[Tony Hagen]

Hi,

I am looking for an alternate part # of u25 and u13 - the original part # is
MGA81563TR1G is a rf amplifier

in my hackrf I damaged both with static antenna charge



73
Tony
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Today's Topics:

1. Hackrf One output impedance (Gavin Jacobs)
2. Re: Hackrf One output impedance (Michael Ossmann)


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Message: 1
Date: Sat, 22 Sep 2018 00:32:55 +0000
From: Gavin Jacobs <***@hotmail.com>
To: "hackrf-***@greatscottgadgets.com"
<hackrf-***@greatscottgadgets.com>
Subject: [Hackrf-dev] Hackrf One output impedance
Message-ID:
<***@MWHPR2201MB1392.namprd22.prod.outlook.com>

Content-Type: text/plain; charset="utf-8"

What is the output impedance when transmitting at 147.42 MHz with and
without the output amplifier?

I?ve built an RF amplifier to boost the output about 26 dB, but with no
signal it oscillates. The data sheet suggests it is probably due to an
impedance mismatch between the Hackrf and the amp. So, can anyone say
definitely the impedance of the Hackrf?

Thanks,
Jake

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Message: 2
Date: Fri, 21 Sep 2018 18:40:32 -0600
From: Michael Ossmann <***@ossmann.com>
To: Gavin Jacobs <***@hotmail.com>
Cc: "hackrf-***@greatscottgadgets.com"
<hackrf-***@greatscottgadgets.com>
Subject: Re: [Hackrf-dev] Hackrf One output impedance
Message-ID: <***@ossmann.com>
Content-Type: text/plain; charset=utf-8

The output impedance is 50 ohms.

Mike

What is the output impedance when transmitting at 147.42 MHz with and
without the output amplifier?
I?ve built an RF amplifier to boost the output about 26 dB, but with no
signal it oscillates. The data sheet suggests it is probably due to an
impedance mismatch between the Hackrf and the amp. So, can anyone say
definitely the impedance of the Hackrf?
Thanks,
Jake
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[Žilvinas Atkočiūnas]

I would try MGA-82563.

Regards.

Zilvis

[Tony Hagen]

Hi Zilvis,

Thank you very much for suggesting the alternate part # of MGA81563TR1G

I think many will be benefited because the front end protection of hackrf is
not that good secondly I have doubt whether the mfr. has at all used the TVS
diode in the antenna INPUT - to me it looks like a capacitor.



73
Tony
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From: hackrf-dev-***@greatscottgadgets.com
Sent: Tuesday, September 25, 2018 10:58 AM
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Today's Topics:

1. Re: MGA81563TR1G alternate (?ilvinas Atko?i?nas)
2. Re: Firmware under Windows (James Brown)


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Message: 1
Date: Mon, 24 Sep 2018 08:28:46 +0300
From: ?ilvinas Atko?i?nas <***@gmail.com>
To: hackrf-***@greatscottgadgets.com
Subject: Re: [Hackrf-dev] MGA81563TR1G alternate
Message-ID:
<CAHFd=ybHo899YEtsobs5mtxnBYtRr1xrwhXLjAS54Dv5=***@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

I would try MGA-82563.

Regards.

Zilvis
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Message: 2
Date: Mon, 24 Sep 2018 13:02:06 -0700
From: "James Brown" <***@SETI.Net>
To: "Dominic Spill" <***@gmail.com>
Cc: "hackrf-dev" <hackrf-***@greatscottgadgets.com>
Subject: Re: [Hackrf-dev] Firmware under Windows
Message-ID: <***@Zeke>
Content-Type: text/plain; charset="utf-8"

Thanks Dominic.
Worked great once I screwed up enough courage to commit to it.
Many a device has been rendered brick like at my hands.

From: Dominic Spill
Sent: Saturday, September 15, 2018 12:40
To: James Brown
Cc: hackrf-dev
Subject: Re: [Hackrf-dev] Firmware under Windows

I would like to re-load the firmware on one of my HackRF One. I would like
to do that under Windows 10 64 bit.

The first thing you'll need is a copy of the HackRF tools built for Windows.
I don't know if you're building your own or looking for precompiled
binaries, but if it's the latter, you can find them included in the packages
here: http://downloads.myriadrf.org/builds/PothosSDR/

Has anyone done this? is there directions somewhere that I can?t seem to
find?

Once you have the hackrf_spiflash tool, the usage is the same as any other
platform:

hackrf_spiflash -w hackrf_usb.bin (or whatever your firmware filename is)

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