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G4WYW > TECH 30.08.05 18:45l 51 Lines 1523 Bytes #999 (0) @ WW
BID : 209590G4WYW
Read: GUEST DL1LCA OE7FMI
Subj: Slim Jim from 300 ohm wire
Path: DB0FHN<DB0CL<DB0PDF<DB0SM<DB0EA<DB0RES<ON0AR<7M3TJZ<JE7YGF<XE1FH<
KP4IG<W4JAX<GB7FCR
Sent: 050829/1556Z @:GB7FCR.#16.GBR.EU #:64498 [Blackpool] FBB-7.03a $:209590G4
From: G4WYW@GB7FCR.#16.GBR.EU
To : TECH@WW
This is handy for use in an emergency and can be rolled up and place
in a pocket. The feeder *could* be attached by using small crocodile
clips but is better being soldered.
Here are the dimensions for a 2 meter Slim Jim antenna,
made from 300ohm ribbon cable.
/ Bend both ends and solder together
__ __/
l l
l l
l l
l l
l l
l l
Total l l
length l l
150cm l l
l l
l l __
l 2 to 2.4cm gap
l __ __
l l
Connect l l
co-ax l l 49cm from gap to connection point of feeder.*
HERE------ b d b = braid d = centre core __
l l 10cm
__ l__l __ __
\
\
\ Bend both ends and solder.
*
The actual connection point for the feeder will vary for each situation
so an accurate point for attachment can not be given precisely. I used
an Antenna Anyliser for mine to give an S.W.R. that was unmeasureable
and the aerial radiated well.
50 ohm coax feeder length 3,5,7mtrs. etc. (approx)
73 - Mel, G4WYW @ GB7FCR.#16.GBR.EU
Message timed: 16:53 UTC on 29 Aug 05
Message sent using Winpack 6.80 (R)
Written by Roger Barker G4IDE.SK 9/9/04 R.I.P.
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