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- Why do hams often conclude messages with 73?
Looking at amateur radio forums and email threads, oftentimes amateur radio operators will use "73" or "73s" where one might otherwise expect to find "Sincerely" or "Regards" Why?
- jargon - CB v Amateur Radio - Amateur Radio Stack Exchange
I am learning about Amateur Radio so as I can go for my foundation licence but I was on CB back in the days, a channel nine monitor and used the 10 code and the Q code but all I can see is the 73
- digital modes - How do you log (or not) busted FT8 QSOs? - Amateur . . .
Since it is "technically" a complete QSO I log it (in DXKeeper) but don't upload to e-qsl or LotW unless the other party does If he does, I'll upload: if he doesn't I assume he has it as incomplete I think this saves a lot of time later, looking up the QSO details in the txt log! Some folks simply don't bother with "73" 73 Dave - K1DJE
- How does a folded dipole work? - Amateur Radio Stack Exchange
Per the above; although correct based on a free space dipole impedance of 73 ohms, I would suggest that very few practical dipoles are close to this based on the typical proximity to ground and the slanting, inverting or angle of placement; especially on 160m and 80m
- What is the impedance of an end-fed half-wave antenna?
Theoretically, (73 + j42 5)Ω When the dipole is too short, its reactance will be capacitive When it's too long, inductive Since the exactly half-wave dipole has a slightly inductive reactance, shortening it can eliminate the reactance The exact amount of shortening depends on the thickness of the wire 0 41λ sounds like a reasonable estimate
- procedure - CW contact content - Amateur Radio Stack Exchange
In the end, we have 73, which is commonly used Then there's the procedural part I send SK, meaning that I'm ending the conversation and I send CL, meaning that I'm closing down my station The other side will provide a similar transmission Sometimes, at the very end, people will send E E and E after the final official relation
- CW: when I supposed to send E E? - Amateur Radio Stack Exchange
I'm new to CW and one thing I couldn't figure out is when I supposed to send "E E" Let's say I'm calling CQ and somebody answers me The QSO is almost over Should it be ended like this: - TNX FE
- Core mix preferences for a balun (or unun) vs a choke
The MnZn ferrite cores (Mix 31, 73, 75) have high permeabilities above 800 µ, have fairly low volume resistivity and moderate saturation flux density They offer high ‘Q’ factors for the 1 KHz to 1 MHz frequency range
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