SDRplay Community Forum

I happen to know the mini-whip construction well. The one and _only_ point to be grounded is the ground tap of the (antenna) power adapter. No ground loops allowed.

73, Jukka

Do you happen to own a multimeter? If you have, you can check if there is connection between the earth terminal of the AC plug and the DC minus of the power supply?

The UK plug (if you are in UK) is a little bit strange and also frightening thing for me:)

73, Jukka

Hi,

is there possibly a difference between your power supplies in a way that one 'passes' the ground to the mini-whip power adaptor, and the other doesn't?

73, Jukka

Ok, here it is, in the middle. 2MHz low-pass filter. Plug-in version. Cute as a small pig, as we tend to say hereby. 73, Jukka

I hope that you are also getting a more educated answer - but the truth is, that if you connect a decent antenna into RSP2, during nighttime / good condix in MW band you will also be hearing a lot of signals which actually don't reside in MW band, but are from somewhere higher.

73, Jukka

Thanks Andy for your tip for RFSim99.

It's easy to get learned and fun to play with.
73, Jukka

Andy, as you seem to be experienced with external filtering, can you possibly recommend a solution for me: For listening MW and 160m I have a Double-KAZ antenna, with about 1 kohm impedance, symmetric. It's fed to the RSP2's Hi-Z port by using 12 meters of 450 ohms ladder line. I'd like to add an ex...

Hi, I have experienced the similar, but haven't taken such an analytical approach on that as you've done. Could you possibly share some more details, Sir? - Did I calculate right, that when you are tuned into let's say 1.8MHz (Zero IF), you are also receiving signals which actually are at around 7.2...

There exists several directional mediumwave receiving antenna concepts based on an idea that the directionality is optimized by 'tuning' an end-resistor for the best achievable Front-to-Back (F/B) ratio, and after that usually replacing it with an equivalent fixed resistor. For example Beverage, EWE...

Hi,

you can find it in SDRuno: OPT/About.

73, Jukka oh2bua