M0KWR Amateur Radio Website
To combat the ever increasing noise level on 160 meters I replaced my old 160-meter coax receiving loop with a Wellbrook ALA100LN large aperture loop. These are not cheap in my opinion but I had to try something to reduce my noise on the 160meter band and this looked like the best option for my location, plus it gives you a bigger scope of experimentation with the option of using the amplifier with different size wire loops.
I was very impressed with the build quality of the loop amplifier and the power interface; both these were very nicely finished in cream colored weatherproof boxes.
After reading more information about the loop and the amplifier I was worried about overloading the loop amplifier with RF from my doublet.
I had a chat with Andrew at Wellbrook about of my concerns regarding RF damage to the amplifier and the positioning of the loop under my 260-foot doublet which would place the loop in a very high RF area.
Andrew said I could make the loop any size from 6 to 18 meters in circumference and he recommended I try an 8-meter loop first. This would reduce the amount of RF the loop amplifier would be subjected to.
After further research I decided to make two loops on the same frame, I made the frame from 2 glass fishing poles and I used a cheap rotator to do the rotating bit. Although you only need 90 degrees of rotation and after using the loop for several weeks I don’t rotate it very often so maybe you could do without the rotator.
I made the outer loop 8 meters in circumference and then included an inner loop 4 meters in circumference. The loops are switched from the shack via a relay arrangement mounted in a plastic box between the 2 loops. I can now select 8mtr or 4mtr loop from the shack.
The good bit about making the loop smaller was the space required to rotate the loop meant it would still fit within my layout in the garden but as I said. Do I really need to rotate the loop?
At my QTH I do suffer from a strong local AM broadcast station about 6 miles away. This has caused some issues in the past but I was keen to see how the Wellbrook coped with this strong AM station.
I connected up my radios to the loop, Icom7300 and my FT2000 and neither of them suffered from overloading from the AM stations on the 160-meter band but when I connected my SDRplay receiver to the loop it was a different story. It was always my plan to have a separate receiver for the 160 band but on the receive loop, the SDRplay was receiving AM broadcast stations all the way up the bands.
I connected my doublet to the SDRplay and I didn’t have a problem so it looks like I will have to build a high pass filter to eliminate these AM stations when using the loop on the SDR receiver. Click the link for more info about the SDRplay.
Tests so far have been very good and I am impressed with the wide band coverage which means no tuning when listening around the bands. Switching between the 2 loops does make a difference and obviously a reduction in received signal strength but well worth doing.
More to come after some testing.
Vielen Dank fur Ihren Besuch auf meiner Website. Ich hoffe Sie finden etwas interessantes
Many thanks for visiting my Website I hope you find it interesting
Another try at noise reduction on 160 mtrs
The iMini-Whip HF,VLF active RX antenna,10kHz to 30MHz SO-239 (with RF isol. trans.) RA0SMS
I purchased a mini whip from the usual on line auction site form a Russian radio amateur RA0SMS. I couldn’t buy the parts and make this in the UK for the price he was advertising. So I decide to give it ago and made a purchase. 2 weeks delivery was very quick and the postage was included in the price. This is now 45 feet up on the mast at the end of the garden to keep it away from any noise source. 80 meters and up it is brilliant for such a small antenna, but the 160 meter band is spoilt by the local AM stations. They appeared to spoil the reception all the way up the band.
My antennas are always changing but today when I wrote this I only have 1 antenna.
I have a 260 foot doublet @ 50 ft for all bands.
The Wellbrook loop for receiving on 160 meters. My main bands I use are 160 meters and 80 meteres.
I make all my wire antennas and feeders.
Below shows the construction of my 600ohm open wire feeder
In the downloads section I have many manuals for different radios that I have collected over the past years as my radios have passed through, also a section on antennas, baluns and open wire feeder of all types. All these are in PDF format so easy to download.
There is also a software folder with some free ware software that I have collected for my own personal use. Its all unlicensed free ware. Ham radio deluxe early versions are also available. I update these from time to time. I use this for my own cloud for storage.
My standard audio settings.
Menu settings after the PEP 2000 upgrade without speech processor
.085 3000WB if not using the 4khz band width
. 125 100
. 126 0
. 127 1
. 128 1500
. 129 5
. 130 1
. 131 3200
. 132 8
. 133 1
. Mic gain 10 o'clock
These setting are what I am currently using with this microphone and mixer. The mixer is connected to the rear microphone input this allows you to make full use of the FT2000 audio mixing. Front microphone jack is not used.
Menu settings after the PEP 2000 upgrade with speech processor .
. 085 3000WB if not using the 4khz band width
. 134 100
. 135 -8
. 136 1
. 137 OFF
. 139 1
. 140 2700
. 141 8
. 142 1
. Mic gain 10 o'clock
FT-2000 Menus :
028 CAT BPS "384H"
029 CAT TOT "100" (Yaesu default is 10)
030 Cat RTS on the FT-2000 to "OFF"
PTT METHOD "CAT"
PTT PORT "NONE"
Tick the ENABLE CAT Box
RIG NO. 128 Yaesu FT-2000
SERIAL RATE "38400"
DATA BITS "8"
STOP BITS "2"
is still one of my favorite radios and with 200 watts available
The Mini Whip is mounted on the 45ft tiltover mast at the bottom of my garden
A flight up to the Hornsea Amateur Radio Rally October 2016 and a meet up with some of the 1.972khz boys.
The RSP2 is the new enhanced version of the popular RSP1 which provides three software selectable antenna inputs, & new stability and clocking features ideally suited to industrial, scientific & educational applications!
SDR Play receiver is one of the best I have used in the sub £200 catagory.
Behringer XENYX 802 - Analogue mixer - 8-channel
Studio Microphone and boom purchased off EBay
SDRuno high performance SDR software . SDRuno contains native support for the SDRplay RSP and no extra plugins are required. SDRuno provides a rugged, flexible and high performance SDR receiver capability and boasts some excellent features – check out the video demos on our YouTube Channel
SETINGS ON THE RADIO
From the top of the menu
ACC/USB OUTPUT = AF
ACC/USB AF OUTPUT = 25%
ACC/USB AF SQL = OFF (OPEN)
ACC/USB AF BLEEP = OFF
ACC/USB IF OUTPUT LEVEL = 50%
ACC MOD LEVEL = 50%
USB MOD LEVEL = 76%
DATA OFF MOD = MIC
DATA MOD = USB
EXTERNAL KEYPAD = ALL OFF
NEXT SELECT CI-V MENU
CI-V OUTPUT (FOR ANT) = OFF
CI-V USB PORT = UNLINK FROM (REMOTE)
CI-V USB BAUD RATE = AUTO
CI-V USB ECHO BACK = ON
NOW RETURN TO CONNECTORS MENU USE
USB SERIAL FUNCTION CI-V
RTTY BAUD RATE = 9600
USB SEND = OFF
USB KEYING (CW) = DTR
USBKERYING (RTTY) = DTR
After the launch of the Icom 7300 and all the great reports I was hearing on the bands I decided to add one to the shack. Its a very good radio for the price and worth every penny of £1050.
It has loads of features that are in the menus but it is a very intuitive radio and very easy to use. One thing I do like is that PSK/RTTY can be worked without an interface. Hook up your USB and run HRD, it takes no time at all. I also operate my 7300 remote using the Icom RS-BA1 software and it works perfectly. I will add my setting to this page shortly but this will take some time to explain.
Remote operating the Icom using the RS-BA1 software from Icom.
You will need to install the RS-BA1 software on both computers. The computer connected directly to your radio and your remote computer you will operate from. You will only need to run the server software on the computer connected dirctly to your radio. On your remote computer you will need to run both the remote control and the remote utility . The sofware server is the link between your computers and the radio. The radio control software controls the radio on your remote computer.
The new Icom 7300
RS-BA1 REMOTE SET UP
This is for the computer connected to your radio.
SELECT NETWORK SETTINGS
PC NAME = YOUR COMPUTER NAME
All the ports should be already populated
IN INTERNET ACCESS = ADSL/CATV
On the tab select “server” In settings set up a user name and password.
On the tab select “radio” in settings at the bottom click add radio.
New window opens. (Add these settings)
Enter radio name = ic7300
Set baud rate to = 115200bps
Make radio public
CI-V enter 94(Default for 7300) unless you have changed it.
I change my address to 74 so it would be supported in the HRD progam as a ic7700.
COM PORT SET TO AUTO
Tick the boxes for AF and MOD.
Click user permission and select the user name you created earlier.
Install all RS-BA1 software on both your computers and connect your Ci-V cable and USB lead to your shack computer.
Copyright Kent Royce 2016
All images © 2003-2016 Kent Royce.
The above picture shows the screen and settings required on the remote computer.
Building a high pass filter to help eliminate the strong local AM stations that are causing problems on 160 mtrs
ICOM Hex address and Baud rates
Click images to enlarge