Friday, May 22, 2020

Amazon Phishing: Beware

If you click on the link, you are asked for your user name and password.  
A classic.  Several ways to know it not real.

Spanning the Globe: 21st Century Remote Op

Thursday, May 14, 2020

Wednesday, May 6, 2020

Wind on the Mountain

I'm sure everyone has wind from time to time....

Click here to view wind on the mountain!

Saturday, May 2, 2020

110' Dipole SWR Plots

Note the vertical bands are the ham bands starting with 160m on the left and ending with 6m on the far right.
Click a plot to enlarge.

Full Range SWR

80m SWR

40m SWR

20m SWR

10m SWR

Cooper Wire inside Balanced Line

Unused freshly stripped 450 ohm balanced line compared
to weathered 300 ohm balanced line freshly 
stripped back to expose the copper wire.

These are the ends of a 6" section of weathered 300 ohm 
balanced line. The bottom image was 
unexposed (freshly stripped).

Friday, May 1, 2020

Dipole 220' May 1, 2020

It is May 1, 2020.  I put the antenna analyzer on the the 220' dipole and the Full Wave 80m Loop today.  The following plots show the SWR characteristics of the dipole.  The next post reports on the full wave loop.

Full Spectrum R X Z





Analysis of W4UOA Loop May 1, 2020

 80m SWR

80m R X Z

40m SWR

40m R X Z

20m SWR

20m R X Z

17m SWR
17m R X Z

15-12-10m SWR

15-12-10m R X Z

Tuesday, April 28, 2020

So...what's it called?

Next project!  We need to get the name of this app and get it!

Monday, April 27, 2020


Eight years ago I developed a Windows app to control my FT-2000D.  The following is a short video of the app prepared for DF3CB.  Enjoy!

Wednesday, April 22, 2020

Antenna System Revisited

Antenna maintenance on the mountain is almost a full-time job.  High winds twist wire and lanyards and support limbs break and grow into the rope.  Time has, however, confirmed for me an approach that works day to day and can be readily maintained.  The basic idea is shown below.

The Antenna Lanyard is threaded through the spring link.  The spring link is securely tied to messenger.  This allows you to lower the end of the antenna to the ground level for maintenance as required.  You can find these spring links listed by a number of names: spring link; spring snap; or carabiner.  They came in a variety of sizes from 1/8" up.  I use 1/4" stainless steel for this purpose.  In my experience the antenna lanyard slides smoothly through the link allowing for movement as the trees sway in the wind.  Some people find it best to put a weight, large spring, or elastic strap at the end of the lanyard, to allow more play in the lanyard.  I do not do this.  We are at 1,700' on the top of Lookout Mountain; we experience high winds on a regular basis.  This system has worked well for me.

I use the same approach to support the center feed point.  I feed all my antennas with balanced line.  I either fabricate my own or use WA1FFL's Ladder-Loc to suspend the center feed point.

Wednesday, February 5, 2020

How to Connect RCForb and N1MM

How to Connect RcForb, N1MM and a Remote K3*

  • Start with the K3.  In the K3 Config Menu, set PTT-KEY to OFF-DTR.  Be sure to save the change.
  • In the RcForb Server under Options->Radio Config->PPT & CW Keying, enable "External CW" and select the same COMx port as used for the local K3, and select DTR.  In the example shown below, the RcForb server connects to the K3 via COM9.

  • Save and restart the RcForb server.
  • In the remote RcForb Client, under Virtual Devices, select an unused COMx port, in this example COM5, and set the slider to ON.  Restart RcForb Client to create the COMx port.

  • In N1MM, go to Config and under Port enter the COMx port you created in the RcForb Client.  Check CW/Other.  Click on Set.
  • In the pulldown set DTR to CW and RST to Always Off.
  • Disable all 4 items regarding PTT options.  That's it.  Okay out of all the dialog boxes.

  • When you use N1MM with RcForb, always start the RcForb Client first.  The RcForb Client creates the virtual COMx port use by N1MM.  RcForb creates this port every time it starts and removes it when you close the RcForb Client.  It is NOT persistent.
  • When using CW on the K3 be sure VOX is on.
  • Good DX and Contesting!

*A very special thank you to Roger, W8JR, at RemoteHams.   This post would NOT have been possible without his help.  Thank you Roger. 

W4BXI Operating 21st Century Position

Friday, January 17, 2020

220' Dipole 300 Ohm Feedline Reattached and 450 Ohm Reinforced

300 Ohm 220' Dipole Balanced Line at the Top of the Picture

450 Ohm Loop Balanced Line in the Bottom of the Picture

450 ohm balanced line now secured with 
two UV resistant cable ties.

300 Ohm balanced line secured with 
heavy duty UV resistant cable tie.