The ON4UN Lowband DXing Book – 5th Edition – 10 Years Later

The ON4UN Low Band DXing Book I have absolutely revered the ON4UN Low Band DXing book – but it has a HUGE gaping hole in it. It doesn’t even mention magnetic receiving loops. Tom at his W8JI.com website does mention them, but they have been passed over for Flags, Pennants, K9AY Loops, Beverages, Double Half Delta Loops. Sure – if you have the acreage…

KY6R Big Mag Loop is Even Better on Top Band!

RDF is 9 and F/B is 27 dB – perfect for Top Band DXCC chasing . . .  This antenna system beats what I used to make DXCC on Top Band – which was two Wellbrook ALA1530LNP’s phased through the NCC-2. Turns out – its also killer on 80M.  

KBOI – from Zero to S8

Before the Wellbrook ALA100LN preamps – I did not hear KBOI in Boise, Idaho at all. That was a real surprise since its a Clear Channel 50KW station: They are a 50KW station, but at night are directional with their coverage Its amazing that before the Wellbrook ALA100LN’s I could not hear a peep out of this station, and now – they are very…

KY6R V2.0 (QRP, SWL, Experimenter)

Elecraft K3 with Win4K3Suite, NCC-2, Begali Sculpture Mono and test gear Now that the KY6R Big Mag Loops are done, and all modules are installed in the DX Engineering NCC-2, I was able to take a shack “action shot”. Speaking of Big Mag Loops: The KY6R Big Mag Loop Feedpoint – Wellbrook ALA100LN preamps I used a step drill bit to open a hole…

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…