Wellbrook ALA100LN

The Good Stuff was delivered today – the ALA100LN preamps I was hoping to try to record the creepy Xmas music during the Greyline at our sunset, but that wasn’t in the cards. Interestingly, this varies day to day – KBND came crashing in earlier than I think it does – otherwise I guess I could have been too late today. I might need…

Up Next: The Wellbrook ALA100LN Preamps

https://www.loop-antennas.com/wellbrook/ALA100LN-M The preamps should be here in time for this weekend, and I can’t wait to see how they affect the KY6R Big Mag Loops. I will also build a tuned circuit for 40M for one of the loops and experiment with that as well – but only AFTER I test the NCC-1 I have that has the 40M filters in it. The weather…

Magnetic Loop “Platform” for Future Testing

A really nice remote tuning capacitor circuit for a receiving mag loop I really like the simplicity and direct feedback of this circuit – that uses variable diodes – NTE618. The circuit can be found on this web page – https://www.randombio.com/loopantenna.html I’ve done enough testing with the loop – at its lowest usable frequency, but I only took one quick test on 40M, and they…

KY6R Big Mag Loop RDF = 9 dB

Two KY6R Big Mag Loops result in an RDF of 9 and a nice null off the back(s) Here is a nice chart of receive antennas and their RDF – https://www.k7tjr.com/rx1comparison.htm A classic loop pattern – this is with both antennas in line – pointed the same direction These larger loops do model better on 160 and 80, but are still OK on 40M.

Measuring Common Mode at KY6R

The MFJ-854 RF Current Meter Yes, I will have fun today sniffing around the shack and antennas looking for Common Mode. I’m lucky – besides finding and reading Jim’s Receiving Antenna Choke Cookbook: http://k9yc.com/RXChokesTransformers.pdf I ran my ideas by Andy Ikin at Wellbrook, and he reminded me that loop antennas are not as susceptible to Common Mode as verticals are – or other antennas…

Common Mode RFI, Chokes and the MFJ-854

The MFJ-854 RF Current Meter can detect common mode on a wire Here is one of the best reasons why MFJ should be praised and not scorned. I have been reading about Common Mode Noise / Interference for years – most notably on the W8JI and other web sites, and while there are many suggestions on how to mitigate it using ferrite snap on…

Radio Locator

I have found the night time pattern maps from https://radio-locator.com/ I have been enjoying finding out what power AM BCB stations transmit at night and also in what directions. In pretty much all of the cases so far, the stations I have been receiving with the KY6R Big Mag Loop have patterns that notch out or are in no way close to transmitting toward…

Exploring the AM BCB With Win4K3Suite

Its fun to “fill in the station map” by tuning into signals that the panadapter shows I’m really enjoying finding small market rural radio stations – even though they all play crap. These are perfect for playing with the NCC-2 phasing unit – even though I am a couple of weeks from nailing down my “dream” pair of large magnetic loops with Wellbrook ALA100LN…

KY6R Big Mag Loop Feedpoint Box

I’m using this very sturdy junction box with 3/4″ compression strain relief fittings The 3/4″ copper coil will go into each of the strain relief fittings and the Wellbrook ALA100LN preamp will be inside – weatherproof. The copper will be fit to the frame in a big circle and attached to the redwood using these “pex clips”:   For the second night – I’m…

KY6R Big Mag Loop: Next Steps

I’ve logged three stations up north in Oregon using one Big Mag Loop and the W6LVP Loop Now that I have done enough tests to settle on two Big Mag Loops, I will have to stage my build based on when I get the parts – which will be here over the next 2 weeks. This Week Pre-build whatever I can while waiting for…