[Top] [All Lists]

Re: Topband: Some experiments with a short beverage, not succeeding very

To: Mark Lunday <>
Subject: Re: Topband: Some experiments with a short beverage, not succeeding very well
From: Cecil <>
Date: Tue, 30 Jun 2020 14:12:20 -0500
List-post: <>
Receive antennas are all about S/N ratio not signal strength. They will be 
significantly down but should be much quieter.


Sent from my iPad

> On 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
> SKCC #16439  FISTS #17972  QRP ARCI #16497
> _________________
> Searchable Archives: - Topband Reflector

Searchable Archives: - Topband Reflector
<Prev in Thread] Current Thread [Next in Thread>