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G8MNY  > TECH     08.05.22 09:32z 72 Lines 3424 Bytes #23 (0) @ WW
BID : 1696_GB7CIP
Subj: 23cm 65el Loop Yagi Info
Path: SP7YDD<SR8BBS<OK0NBR<F3KT<CX2SA<VE2PKT<N2NOV<K5DAT<GB7CIP
Sent: 220508/0636Z @:GB7CIP.#32.GBR.EURO #:1696 [Caterham Surrey GBR] $:1696_GB

>From g8mny%gb7cip.#32.gbr.euro@n2nov.ampr.org Sun May  8 02:38:18 2022
Received: from n2nov.ampr.org by n2nov.ampr.org (JNOS2.0m.5Gx) with SMTP
	id AA290037 ; Sun, 08 May 2022 02:38:18 EDT
Message-Id: <1696_GB7CIP@k5dat.bbs>
>From: g8mny@gb7cip.#32.gbr.euro
X-JNOS-User-Port: Circuit  (DATBBS:K5DAT-1 K5DAT-1)  -> Sending message

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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