Good evening Frank. Just got in from work. I was talking mainly about
160. Before 2019 I was a true alligator!
73,
John, W4NU
Get Outlook for iOS
On Tue, Jun 30, 2020 at 5:54 PM -0400, <donovanf@starpower.net> wrote:
Hi John,
250 feet isn't a short Beverage on 80 meters, it should perform
superbly. In my -- now long ago -- professional life we built and
operated phased arrays of up to 64 Beverages all the way up to
30 MHz, feeding SDRs, and they worked superbly.
73
Frank
W3LPL
----- Original Message -----
From: "John Harden, D.M.D."
To: topband@contesting.com
Sent: Tuesday, June 30, 2020 8:05:56 PM
Subject: Re: Topband: Some experiments with a short beverage, not succeeding
very well
I have never had any luck with short beverages, EWE's, FLAGS, low
dipoles, etc. Total waste of time.
In 2010 I went to the Hi-Z 3, then the Hi-Z 4, and finally the Hi-Z 8. I
hear stuff I have never heard before..
Since then I added a Waller FLAG on a 34 ft boom at 95 feet...
Best moves I ever made..
73,
John, W4NU
On 6/30/2020 3:04 PM, Brad Rehm wrote:
> Mark,
>
> I didn't see any mention of a preamp. Signals from a good Beverage are
> typically 20-30 dB below what you'd hear from a dipole or a vertical.
> Everything else you've done looks good. Keep it up!
>
> 73,
> Brad KV5V
> Salado, Texas
>
> On Tue, Jun 30, 2020 at 1:57 PM Mark Lunday wrote:
>
>> "Beverages just want to work" is what I have heard.
>>
>> Not having much luck with that here. I suspect operator/installation
>> error.
>>
>> I did a lot of reading and I must be doing something wrong.
>>
>>
>>
>> * 250 feet of insulated wire strung out in 030 degrees direction
>> toward EU, pretty straight, varying in height from 4 to 6 feet, running
>> through thick brush with no metal objects or artificial elements along the
>> run.
>> * 9:1 transformer at feed point with ground rod
>> * 300 feet of coax, mix of RG-8, MMR-400 to get to the edge of the
>> woods from the house
>> * No terminating resistor
>>
>> On bands 160-40, the signals are very weak. I am monitoring WSPR, FT8. I
>> can hear signals on 160-40 but they are way down compared to dipoles and
>> inverted L on the same bands. Like 20-30 db down. From what I read, I
>> should NOT need an HF pre-amplifier, right?
>>
>> Signals on 30 and 20 seem to be better and I can copy some DX from EU on
>> FT8.
>>
>> I will try installing a new ground rod, the old one is 10 years old and
>> perhaps not making a good ground connection at the feedpoint. The
>> transformer is brand new, so that's not an issue. The coax has tested out
>> fine. Soil is central North Carolina clay, a bit dry at this time.
>>
>> I am guessing performance is poor on 160-40 because of the short length
>> and that it's bi-directional (no terminating resistor), which I am seeing
>> on 30 meters. But I did not think it would be THIS bad on 160-40....
>>
>> Mark Lunday, WD4ELG
>> Greensboro, NC FM06be
>> wd4elg@arrl.net
>> http://wd4elg.blogspot.com
>> SKCC #16439 FISTS #17972 QRP ARCI #16497
>>
>> _________________
>> Searchable Archives: http://www.contesting.com/_topband - Topband
>> Reflector
>>
> _________________
> Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
|