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Story time... Well propagation here is crap now that it's the dark time of year for CB skip so it got me thinking about the good old times when skip was at its peak. This reminded me of a childhood experience which stuck with me when the 11 year solar cycle was at its peak and skip was crazy...

So I have built a few match boxes using toroids to convert the 50ohm to the thousands of ohms required for the end fed dipole and they work well, ... actually better than just well lol. What I am curious about is how to calculate how to do the same thing using an open air coil instead of on a...

Even after disabling adblocker just for this website it still pops up! It is getting effing annoying. I realize ads pay for this place and all, but c'mon there is letting someone know once or twice, and annoying the shit out of someone every single time they click something!

I went by Megamouth as a young kid because I used one of those red devil mics turned all the way up just to piss off some people I didn't like. Others on the band gave me the handle lol.

Most any antenna will work through an antenna tuner, assuming you don't mind the massive losses from using something only slightly better than a radiating dummy load that is a short stick on low frequencies. Hell you could tune up a tree by pounding nails in it and making it into a monopole...

Glad you understand what is going on and thank you everyone else for the tips and help. Yeah I knew it had something to do with the time between the RX and TX contact in the mic jack since the original mic had a bit of space between going directly from TX to RX in the switch contacts which was...

Ah so there is no real workaround besides adding another relay with a very short delay to mute the speaker. Well in that case screw it lol. I am not going to tack on more circuitry to something that already works fine just to null a simple problem like that. Glad to know this is a common...

That may be, but once again as I said before the problem existed BEFORE I installed the homebrew roger beep which makes me wish I had not even mentioned it because it just adds confusion. You are absolutely right about the switching transients though. I just wonder if there is a way to reduce...

The fun doesn't start happening until you put in the 50 amp fuse and give it the power it craves.

One thing I found that helps so far is putting a low ohm resistor in parallel with the speaker wires to force quiet the speaker and then crank up the CBs volume to accommodate. This reduces the pop greatly but obviously is kind of dumb since I have to turn up the radio now to get the same...

Just thought I would share this simple two tone roger beep circuit I built and decided to rig into an old radio of mine. It works perfectly and produces two tones, first one higher in pitch than the other. I know some people have strong feelings against roger beeps and other noise toys but...

Here is my radio for confirmation... As you can see no relay besides the blue one on a roger beep I added. You can also see the extra unlabeled switch in the previous photo which switches roger on/off, however keep in mind that the speaker pop issue existed before this mod even with the stock...

As I said above that schematic is the wrong schematic. They say it is the schematic for the Five by Five but it is actually for a different (older) model that uses a relay. That is the site I tried to get a schematic from and it is the wrong one listed in the link. Funny thing is the service...

No relay inside.

Hi all. I have a Teaberry Five-by-Five that I have been playing with for some time and there is one thing about it that annoys the heck out of me. When I unkey with the stock mic quickly there is a light pop sound in the speaker upon going back to receive. When releasing the PTT button...

Well technically even a standard dipole imposes an impedance mismatch since it looks like a 70ohm load into a 50ohm coax depending on antenna height above ground, then to make matters worse one is going from an unbalanced coax to a balanced antenna which introduces its own set of problems. I...

There is no advantage as far as gain goes. A dipole is a dipole and thus the EFHWA will have no additional gain over a bazooka for example. One of the advantages is decoupling the antenna from the coax which greatly reduces common mode currents returning down the line. Also as you said it can...

Hello again. Got some pictures this time. I made a mistake, it is not a 8:1 ratio but a 9:1 for the transformer. The idea is to convert from a current feed to a voltage feed since a dipole at the end requires voltage compared to a center fed dipole where you feed it current. Ground radials...

End Fed Half Wave Antenna I built a simple 8:1 balun out of a ferrite rod to feed the end of a half wave resonate wire and it works fantastic as far as I can tell. The secondary coil has the ground riding side open and needs nothing extra to excite the hot side going to the end fed wire in...

100% modulation should never swing either direction. It should stay steady on an average power RF meter. Positive or negative shift is also known as carrier shift when using old terminology and is acceptable to a point in the positive direction up to 125%+ modulation before it becomes reduced...