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I built a moebius loop from a couple of 1.2m pieces of RG-8X that I had lying around ( a bit bigger than it should be). I attached a 1:1 balun intended for a dipole also that I had lying around. It's

Honestly, from everything I've read here and other forums, for LF, MF and HF you can either choose the AirSpy Discovery HF+ or Perseus. The only practical diference is seen if you decide adopting

I have used my daughters finger nail polish as thread locker. Yes it does contain acetone but if used sparingly and on the end of the screw and nut, should not cause a plastic meltdown event. It

Does anyone have a chart comparing features/price, like sensitivity and other special feataures for the uninformed, so not everyone has to make all the mistakes. Thanks. [image: photo] *Bob Willey*

The AFEDRI SDRs are worth considering as well. Not quite the performance of my RF Space netSDR, but still respectable. Chris Smolinski, W3HFU Black Cat Systems Westminster, MD USA

Yes, front end overload is a major shortcoming of the SDRPlays. Not so much so for the AirSpy products. Yes, the Persus is outstanding and I wish I had one, but not in the cards on a retirement

If you are going to buy a SDR, buy either a Pereus, or a RFSpace CloudSDR. I have both and they are top of the line. I have had several AirSpys and SDRPlays. The AirSPY is okay, but skips band

Hello Tom, Monday, January 3, 2022 This TS-590S that I have had for donkey's years has been great on LF, both RX and TX, but the start of its ills came when I managed to transmit a kilowatt of RF INTO

The AirSpy is a far superior product to the SDRPlay. I have both and several iterations of the AirSpys including the HF+ Discovery. The SDRPlay sits on the shelf gathering dust. Spend a bit more and

Hi Paul. I'd like to save you some grief. I've used the rtl-sdr v3. So I speak from experience. The Youloop was designed to be used with the Airspy HF+ which has very high sensitivity. The rtl-sdr v3

Hi Tom I think most/all switch the below mw ( hpf) filter in and out depending upon frequency.. damn sure mine does when tune below 1700khz..above in, below out.otherwise it would be deaf below 1700..

Sounds like you are making great progress Chris. I doubt that a new TCVR will make much of a difference. Most of them will have filtering to reduce sensitivity at LF/MF. This is to reduce the

All noted Andrew, the installation has been a valuable part of my listening arsenal and is weathering well and continues to give a good account of itself.

Happy New Year. My favorite at the moment is the LZ1AQ active amplifier configured with two orthogonal loops. I have the you loop but have not had the chance to test it. Mike AB4KJ

A rubber gasket is part of the installation kit for the 1m loops. This is to prevent the threaded metal dome from scuffing the plastic loop box and also it should cushion some of the mechanical stress

will give it a go soon (I hope) Many thanks and have a great 2022. // pedro andrade

Try this link from Martin, G8JNJ: https://www.g8jnj.net/moebius-loop-antenna or this one: https://swling.com/blog/2020/04/diy-how-to-build-a-noise-cancelling-passive-loop-ncpl-antenna/ The diagram is

Hi Alan, That looks good, your work has definitely made a further improvement. I'm not sure how you are judging the change in MF/LF performance between loop sizes, but with the antenna connected, you

Hi John, Yes that's the flaw in the plan, but apart from in lab grade stuff, equipment input and outputs are rarely the nominal impedance that they aim to be. You can obtain ready built connectorised

mind sharing some links/diagrams for dummies like myself? many thanks. // pedro andrade