SSH & Powerful Transmitters

#1

Two questions:

  1. I’m not finding how to ssh into the RaspberryPi when running the KrakenSDR Direction Finding image on my Pi. Is this possible, and if so what is the username/PW ?
  2. The documentation mentions being careful around/avoiding powerful transmitters. I understand driving up to a 100K Watt commercial transmitter might be a problem, but what about a 5W handi-talkie in the car while DF’ing and transmitting on a nearby frequency?
#2

Details in the wiki Appendix. Login credentials are krakenrf/krakensdr, SSH port 22.

KrakenSDR is a sensitive receiver and max input allowed is 10dBm. If you’re running 5W you still need to take care that you don’t transmit right near the antennas as that could exceed 10dBm. In the 70cm band, a distance of 2-3m should be safe.

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#3

I’m trying to use one of the antenna elements as a transmitter and to receive with the other 4. But as I set the gain to 0dB and send a signal of -10dBm, Kraken is flagging for ADC overdrive. Can I decrease the gain in any other way?

#4

I know it’s -10dBm, but please be very careful not to increase the power. What is the purpose of transmitting with one antenna?

But yeah -10dBm up close would still cause the ADC to overdrive (but not get damaged). There’s no way to reduce the gain below 0dBm. You could try external attenuators, but I’m not really sure if that would affect whatever your application is.

#5

I am doing some research on antenna coupling and want to measure transmitted power between the elements. Thus I use a generator to create a signal. The use of attenuators will not be a problem and I will probably go that route. But wanted to see if there was any other solutions first.