• 23cm 65el Loop Yagi Info

    From G8MNY@21:5/101 to TECH on Sat Aug 10 10:20:06 2019
    R:190810/0915Z 7855@VA3TOK.#SCON.ON.CAN.NOAM LinBPQ6.0.18
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    R:190810/0911Z @:GB7COV.#29.GBR.EU #:60172 [Coventry] $:15375_GB7CIP R:190810/0911Z @:GB7CIP.#32.GBR.EURO #:15375 [Caterham Surrey GBR]

    From: G8MNY@GB7CIP.#32.GBR.EURO
    To : TECH@WW

    By G8MNY (Updated Sep 06)
    (8 Bit ASCII graphics use code page 437 or 850, Terminal Font)

    R R D ------------------------d i r e c t o r s---------------------
    1 2 111111111122222222223333333333444444444455555555556666
    123456789012345678901234567890123456789012345678901234567890123 └─┴─┴─┴┴┴┴┴┼┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┼┴┼┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┼┴┴┴┴┴┴┴┴┴┴┴┴┴┘
    ~~~--──...___ Clamps└─┘ ___...──--~~~
    ~~~--──[ ]──--~~~

    65 el loop yagi dimensions
    Element Length Cumulative Element Length Cumulative
    mm spacing mm spacing
    Reflector1 140x115 mesh 0 d31 195 2594
    Reflector2 254 79 d32 195 2684
    Driven 232 103 d33 195 2775
    d1 215 131 d34 195 2865
    d2 215 152 d35 195 2959
    d3 215 198 d36 195 3046
    d4 215 243 d37 195 3136
    d5 215 275 d38 195 3227
    d6 215 333 d39 195 3317
    d7 215 424 d40 195 3408
    d8 215 514 d41 192 3498
    d9 215 605 d42 192 3589
    d10 215 695 d43 192 3679
    d11 215 785 d44 192 3769
    d12 215 876 d45 192 3860
    d13 208 966 d46 192 3950
    d14 208 1057 d47 192 4041
    d15 208 1147 d48 192 4131
    d16 208 1238 d49 192 4222
    d17 208 1328 d50 192 4312
    d18 208 1418 d51 192 4402
    d19 208 1509 d52 192 4493
    d20 208 1599 d53 192 4583
    d21 200 1690 d54 192 4674
    d22 200 1780 d55 192 4764
    d23 200 1871 d56 191 4855
    d24 200 1961 d57 191 4945
    d25 200 2051 d58 191 5035
    d26 200 2142 d59 191 5126
    d27 200 2232 d60 191 5216
    d28 200 2323 d61 191 5307
    d29 200 2413 d62 191 5397
    d30 200 2503 d63 191 5487

    Length specifies the distance between holes prior to bending the elements into loops. The driven element is split at the top (furthest away from the boom) & fed with coax which passes through the boom via a hole a few millimetres behind the driven element.

    Boom diameter = 12.7mm
    Driven Element = 4.76mm x 0.71mm copper strip.
    All other elements 4.76mm x 0.71mm aluminium strip.


    Why don't U send out an interesting bul?

    73 De John, G8MNY @ GB7CIP


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    * Origin: HAMRADIO telnet lu9dce.dynu.com (21:5/101)