This roger-beep add-on board was incredibly common a few years back. Seems like every vendor of CB accessories had this board or a copy of it for sale.
Now they're not so common, but it seemed like a good time to post a couple of things we learned about it over the years.
The part number on the integrated circuit (chip) will frequently be rubbed off. For some reason, this one had the chip in a socket with the number rubbed off. The one you see works, the one with the number missing was bad. The one you see is a replacement. The 74C14 is considered obsolete. Another number that works is "CD40106". There are probably others.
The instruction sheet would tell you to shut off the beep by putting a switch in line with the blue wire that carries audio to the mike circuit. This won't shut off the delay when you unkey, just gives you a "roger pause".
The diode with the hemostat clipped to one end is where we install the switch. This will eliminate both the beep and the unkey delay.
You don't need a pic of the empty hole where the long lead of the diode was pulled out, but the green capacitor is a 0.1uf that turns it into a roger burp. There are two tiny .001uf disc caps marked "102" on the other side, wired in parallel. The green cap goes in parallel with them.
And here's the beep off switch wired where it really belongs.
Sure there's other stuff you can do with this board, but those are the highlights.
73
Now they're not so common, but it seemed like a good time to post a couple of things we learned about it over the years.
The part number on the integrated circuit (chip) will frequently be rubbed off. For some reason, this one had the chip in a socket with the number rubbed off. The one you see works, the one with the number missing was bad. The one you see is a replacement. The 74C14 is considered obsolete. Another number that works is "CD40106". There are probably others.
The instruction sheet would tell you to shut off the beep by putting a switch in line with the blue wire that carries audio to the mike circuit. This won't shut off the delay when you unkey, just gives you a "roger pause".
The diode with the hemostat clipped to one end is where we install the switch. This will eliminate both the beep and the unkey delay.
You don't need a pic of the empty hole where the long lead of the diode was pulled out, but the green capacitor is a 0.1uf that turns it into a roger burp. There are two tiny .001uf disc caps marked "102" on the other side, wired in parallel. The green cap goes in parallel with them.
And here's the beep off switch wired where it really belongs.
Sure there's other stuff you can do with this board, but those are the highlights.
73
