One cautionary note on using window line for beverages:
I tried window line last year, unsuccessfully, for a 2-wire bi-directional
beverage. While the electrical performance was satisfactory, the increased
wind load area of the ladder line made it impossible to keep operational.
Gary,
I'm currently using Thomas Betts compression connectors on both flooded and
normal RG6. The tools I'm using were purchased at Lowe's for ~$20 each. One is
a stripper, specific to RG-6. The compression tool is designed for the TB
connectors and RG-6 cable.
Strip the cable so that 1/4
HL5IVL was on this morning as a matter of fact, calling CQ until about 1300z on
1826 or thereabouts. He was unable to copy me, unfortunately. But SM4CAN came
booming in last night and we had a good QSO.
Could be better, but the band isn't dead.
-Jeff
Cedar Rapids, IA
Mike,
I use a short (450') E/W bi-directional beverage when running. This is antenna
is a single-wire with transformers at both ends, feeding two co-ax runs to the
shack. The lines go into a switchbox where I can select either direction
(terminating the unused co-ax in 75 ohms) OR, select
Same situation here. My Low-band season runs from Thanksgiving Day to St.
Patrick's Day. Six directions of beverages go in and come out every year by
the calendar. I'm very lucky to have 80 acres of empty farm field at my
disposal for the duration of winter. This weekend begins the task of
I missed the original post, but if the question pertains to running two
independent beverages in opposite directions on the same supports - Yes. It
works well.
I began doing this last winter, adding shorter, opposite direction beverages to
my NE and NNW (EU and JA) antennas. Performance
If you terminate both ends though, isn't it easier just to use one wire and
relay switch between the feeder and termination R?
73
John
___
UR RST IS ... ... ..9 QSB QSB - hw? BK
John,
Yes, if both beverages are to be the same length, a single wire will work in
both directions. I take this approach on the E/W antenna: It's a single-wire
with transformers at each end and two runs of co-ax to the shack. For this
particular antenna, that was the cheapest / most-robust
Here's an interesting story:
In the early 90's, I worked as a ship-board radio officer. At one of the
training conferences, I met a fellow RO who also worked at the McMurdo
Antarctic base when he wasn't on ships. During one of our (many and frequent)
conversations after hours at the hotel
The inverted L loads just fine to about 700 watts and then causes the Alpha
amp to fault out. I think I am getting a sudden change in antenna impedance.
The antenna is fed through a 5 KW rated choke balun. The feed line exits the
base between radials.
Remove the balun. It's not doing
-Jeff
From: Tom W8JI w...@w8ji.com
To: Jeff Woods jmwoo...@yahoo.com; Ashton Lee ashton.r@hotmail.com;
topband@contesting.com
Sent: Wednesday, November 28, 2012 11:30 AM
Subject: Re: Topband: Inverted L SWR Jumps ???
Remove the balun. It's not doing
*Clap clap clap*
Thanks, Herb. Just ordered one. I have the same problem, and have attempted
the solutions you describe below with respect to 160m interference to our DSL
modem.
My family will appreciate having internet during CQ160 this year.
-Jeff
W0ODS
Be advised that the wire in the Ebay listing is Copper Clad Aluminum. The fine
print's towards the bottom.
While I'd have no qualms about using it for my seasonal, above ground radials,
some of you with higher standards and deeper pockets may prefer all copper.
-Jeff, W0ODS
Similarly, you can parallel a lower capacitance air- or vacuum-variable with
the fixed micas. The ~100pf HV variables are much less dear. Same end result.
-Jeff
W0ODS
On Tue, 10/22/13, Herb Schoenbohm he...@vitelcom.net wrote:
Subject: Re:
If you're switching Beverages, the transformer can serve double-duty as the DC
isolation as well as impedance transformation. 75 (or 50) ohm winding in
series with the coax center and the relay. RF bypass capacitor across the
relay coil.
The BN202-73 or -43 cores work well for this
Take a look at radiomarine.org to see how remote receivers were implemented
commercially more than 40 years ago. It's easier now, but remote receiving
isn't a new thing.
For that matter, neither are Band Scopes, a.k.a. Spectrum Analyzers. My
ancient HP-141T, ca 1974, even has a tracking
I've been doing the same thing with similar wire for several years. It works.
Some of my radials are even salvaged from Cat 5 cable - pretty thin, but they
do the job. I've found they are much more rugged when deployed as twisted
pairs though.
Lately, I've been supplementing the
The simple solution to #1 seems to be allowing only ONE receive location. Too
much separation between TX and RX sites will cause an asymmetrical situation
with regard to propagation, especially spotlight and greyline propagation. I
believe limiting to a single RX site, at least amongst the
Wes,
A sure sign that your RX antennas are good enough is when DX stations that are
Q5 copy repeatedly CQ in your face.
What Mike's saying is true; trying to make a silk purse out of the sow's ear
that is a TX vertical is a losing game. Waller Flags, K9AYs, EWEs, etc. are
all cheap and can
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