This small loop can handle 20 Watts from 45-10m . Loop circumference is 2.5 m with a Faraday coupling loop of 50 cm . Sticks are 6 mm glass fibre ( kiteshop).The 2 vertical sticks are 41cm and the suports are 34cm long. A 2 x 500 Pf tuning capacitor with the sections put in series is used for tuning. Because of the high Q a 1:3 reduction is convenient but not mandatory . The loop is made of RG-213 with the shield and centre soldered together. Highest SWR is 1:1.5 . Despite of bad conditions, first contacts were made troughout Europ with 10 Watts SSB. Meanwhile contacts were made with 5 Watts SSB over the Atlantic including the Caribic , Brasil , USA ands. See the list below. The Faraday coupling loop is made of RG-58 and is bend to a slightly horizontal oval, reducing the space between the loops that leads to a drastic improvement of the swr / return loss.
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| 40m PLOT |
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Plot 14.200MHz after coupling loop modification.
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| Improved coupling by reducing the space between the loops . I used a piece of U-shaped plastic for the looprest. | . |
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Although fast tuning is a big plus with this loop, the overall efficiency is less than the twin capacitor Travelloop further down on this blog. The broadband coupling loop makes a perfect match impossible. A perfect match can only be made with a 2 capacitor coupling . The efficiency on 40m. is only about 5% but enough for cw. The fun realy starts at 30m. and up. On 20m.the performance is verry acceptable . On 10m.efficiency equals a full size 10m. band dipole and amazing contacts can be made with a verry low noiselevel.
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| READY TO TRAVEL |
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| HOLIDAY SHACK |
Some september 2014 holiday QSO's made with my FT-817 and 5 Watts PEP ssb mainly on the 10m band :
HB9AYR made a verry nice copy of the Travelloop Mono . Enter his call at QRZ.com to get more info:
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| HB9AYR Travelloop Mono |
