QRQ CW OP, Bert, AK4G, shares the design of his famous 'no tuner needed' 4 vertical Delta Loops, beam antenna

Over the years you may have heard about this legendary antenna of Bert, AK4G.

He has had one of the strongest HF qrq cw signals in the USA. 

 

- His "SECRET" -

- 4 VERTICAL DELTA LOOPS tied to a 55 foot conductive mast -

 

By switching remotely, how these 4 vertical loops are connected together at the base, he is able to beam his array in any of the 4 directions of the compass.  There is also no need for a tuner on 160, 80, 40 20, 15, 12 and 10 meters.  During a recent cw qso with Bert, he gave permission to publish his antenna blueprint on our website.  He mailed me a letter in 1993 with the details of his design.   Here it is:

Comment by Gary Buda on April 22, 2013 at 11:39am

I've been experimenting with Delta loops, but try as I may, I cannot see any content on this page, i.e. no design document.

Comment by Chuck aa0hw on April 22, 2013 at 3:22pm

Hi Gary,

try downloading this PDF to your desktop - from here:

AK4G'S AMAZING VERTICAL LOOP ANTENNA

Your own desktop PDF READER application should then let you view this PDF file.

Thanks

chuck

Comment by Gary Buda on April 22, 2013 at 6:19pm

Thanks, Chuck.  That worked.

Comment by Peter Krüger on January 10, 2015 at 12:04pm

Hi,

I miss some info abot the length and and ... about this antenna - I asked an expert for MMANA if he may know this type - but he have no clue how he can build it - maybe you have more info about this type? And all bands? Would be nice to set up such a system if it really works at it seems to do.

73 and always gud QRQ Peter DF1LX

Comment by Chuck aa0hw on January 10, 2015 at 2:44pm

Hi Peter,

The 55 foot conductive mast functions as a common "leg" of the loop for all 4 vertical "wire" sections.  Each vertical delta loop is 141 feet long(including the 55 foot center mast of the aluminum pole).  The loops are used TWO AT A TIME for 50 ohms impedance.  They are connected at the bottom by remote antenna switches  according to the schematic wiring diagram on page 2 of the PDF FILE.

Comment by Peter Krüger on January 15, 2015 at 6:47am

Ok - thanks for the info. It seems not be easy to build this antenna in MMANA or 4NEC2 :)

Maybe one picture would help... :)

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