Message 22482 in TECH.WW
From: G8MNY
Date: Sun, 17 May 26 07:53:00 Z
Newsgroups: TECH.WW
Subject: Coax Sleeve Balun
Message-ID: <59906_GB7CIP>
Path: N2MH4|GB7BED|K1AJD|VE3CGR|PI8ZTM|CX2SA|ED1ZAC|GB7CIP
R:260518/0134Z 31293@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260517/0804Z 11401@GB7BED.#21.GBR.EU LinBPQ6.0.25
R:260517/0803Z 8294@K1AJD.#AUG.GA.USA.NOAM LinBPQ6.0.25
R:260517/0803Z 78492@VE3CGR.#SCON.ON.CAN.NOAM LinBPQ6.0.25
R:260517/0802Z @:PI8ZTM.#ZH1.NLD.EURO #:54609 [Den Haag] $:59906_GB7CIP
R:260517/0802Z @:CX2SA.SAL.URY.SOAM #:65106 [Salto] FBB7.00e $:59906_GB7CIP
R:260517/0800Z @:ED1ZAC.EAC.ESP.EU #:13847 [EANET1G.06] $:59906_GB7CIP
R:260517/0753Z @:GB7CIP.#32.GBR.EURO #:59906 [Caterham Surrey GBR]
From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW
By G8MNY (Updated Dec 04)
(8 Bit ASCII graphics use code page 437 or 850, Terminal Font)
This type of balun is to be found in most textbooks & many aerial designs. It
is a 1:1 balun & does not alter the impedance.
fatter outer) braid or pipe over the top of the feeder. It is electrically
connected to the coax braid 1/4 wave from the balanced feeder connections.
This works by hiding the unbalanced outer aerial connections from the outside
world so it can't radiate.
In practice I recommend heatshrink sleeving & heat glue it used to seal the add
outer section.
Common mode Z is only high at the resonant frequency, where it eliminates any
outer feeder current on the unbalanced coax.
Z
Fo
Why don't U send an interesting bul?
73 De John, G8MNY @ GB7CIP
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