Why your Homebrew 5/8 wave antenna isn't working as designed.
A 5/8λ (five-eighths wavelength) antenna is very popular on GMRS (462–467 MHz) because it offers more gain than a 1/4λ or 1/2λ whip, especially when mounted high and in the clear. In the UHF band (GMRS is ~462 MHz), a 5/8λ vertical is roughly 15.5–16 inches long physically (not counting any loading coil at the base that some commercial designs use). Radiation Pattern Characteristics (Free-Space, Ideal 5/8λ over Perfect Ground Plane) Maximum gain : ≈ +3 to +3.5 dBi in free spa
Dec 75 min read
Ham Radio Reference Wallpaper 3840x2160 may be useful to some ham operators.
I was asked to make this for a friend who is getting older and here it is. I decided if he needed the information others might as well....
Sep 17, 20221 min read
New File Server for Ham Radio Users
Files on this site are maintained by the users of this public FTP server. Upload and sort only files that reside in the public domain....
Jun 18, 20221 min read
Worldwide SDR Map for VHF capable SDR's for SSTV from ISS
Click the map or this link. https://www.google.com/maps/d/edit?mid=1nKBUFaGieptmfX-maTULR-2AZO3WzBEq&usp=sharing The Interactive map is...
Dec 30, 20211 min read
How to view schematics posted on Packer Radio BBS messages on a modern PC.
Use the link to copy and past the message into the converter. Codepage 437 Converter - CodeLobe.com This works great.
Feb 27, 20211 min read
Packet Radio Command list.
handy listing of packet (PBBS) commands. The first image came from this site: Introduction to Packet Radio - Part 11 (choisser.com) I...
Jan 6, 20211 min read
Back on Packet Radio
I have been away from packet for a long time. Thought I would give it another try. I set packet back up for one reason. Winlink, however,...
Nov 22, 20202 min read
