Today, we are announcing something quite special.. Please tune in and hear the news! Callum.
Category: DX Commander
Callum’s Videos
Looking at the 4-square array, often used by Ham Radio operators seeking both gain and front-to-back on the lower bands. When you have amazing front-to-back ratio, you will hear better regardless because 75% of your receive is now effectively obscured by the f/b ratio. Fascinating discussion. I have ordered one – and will be using 4 x DX Commander Sig 9 poles 🙂 Callum.
Correction at 33:21 – frequency should be lower – around 6.95MHz. Cheap and Easy.. A Free Lunch for Ham Radio operators. Verticals, dipoles, delta loops, DX or daytime QSOs. Why you need at least THREE antennas.
Callum.
Originally presented to Northern Colorado Amateur Radio Club on Jan 20th 2024.
More videos:
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7zFt6NV9fnnde2lP11fUTQ8 Antenna Modelling
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xtKohJRipVLQ6rxYzRP8eq Tips and Tricks
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xwhA0Msm_bNT4CQ_Bj5D4c Antennas
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7wc6svNLY7IDthw1YCFNq9W Live Streams
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7w9dp9Eqg_UhamrY5Ck3dyX My Stuff
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xvc3rHlpqqCkiBdAzYe8cf Ham Radio Training
One of my best antennas!
After all that work, it doesn’t fit! But everything else works, so maybe a win after all. Callum.
We discuss the simple 2-element phased array, the Christman Method and why 71 and 84 degrees are so important for the phase lines. What pitfalls you are likely to encounter. Is the gain worth it? What is the front-to-back? Basically.. is it worth it..? This follows on from this video: https://youtu.be/sNegMnryalY
John’s files are here:
https://mega.nz/folder/hq4mGY7Z#fSPzKPMhLIGmTnxUewZl1w
Callum (& John).
We discuss my triangular box of tricks that John made for us a couple of years ago and go into detail regarding the phasing lines, the delay line and the dimensions. Join us for a chat. Callum.
The ultimate antenna design for the new Ham Radio operator with a small back yard / garden. Callum suggests going with a multi-band vertical, a Loop on Ground (dedicated receive antenna) and also a low-to-ground dipole for 40m. John suggests similar but with options for half-wave-end-far or maybe off-centre-fed dipole. What would you do..? Callum.
Loop on Ground
▶️ https://youtu.be/jDcaltDUKnI
More videos:
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7zFt6NV9fnnde2lP11fUTQ8 Antenna Modelling
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xtKohJRipVLQ6rxYzRP8eq Tips and Tricks
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xwhA0Msm_bNT4CQ_Bj5D4c Antennas
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7wc6svNLY7IDthw1YCFNq9W Live Streams
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7w9dp9Eqg_UhamrY5Ck3dyX My Stuff
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xvc3rHlpqqCkiBdAzYe8cf Ham Radio Training
The most bizarre and fantastic conditions for 30 minutes at around 23:00 UTC between North America and England (January 2024).
Crazy 40m pileup last Thursday evening (4th Jan 24) here in England. Left VFO is the Vertical Array and Right VFO is a low-to-ground dipole. The Preamp switched on for the dipole because it can’t receive DX that well. Left VFO does not have preamp. Headphones recommended. Callum.
https://youtu.be/Sy1-qW0jP2Q
Link to the modelling is here:
▶️ https://youtu.be/CM40ONno17Y
More videos:
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7zFt6NV9fnnde2lP11fUTQ8 Antenna Modelling
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xtKohJRipVLQ6rxYzRP8eq Tips and Tricks
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xwhA0Msm_bNT4CQ_Bj5D4c Antennas
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7wc6svNLY7IDthw1YCFNq9W Live Streams
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7w9dp9Eqg_UhamrY5Ck3dyX My Stuff
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xvc3rHlpqqCkiBdAzYe8cf Ham Radio Training