Wire in an external PTT line to a CB radio

[Xjeepguy]

Anyone ever done it? I'm referring to like what would be the aux PTT line like in the back of an amateur rig . Let's use the 2950 or Stryker 955 for examples . Anyone ever do this ?

 

[Bow]

Just to key the radio?

or key an Amp?

what do you want it for?

 

[Xjeepguy]

Just to key the radio?

or key an Amp?

what do you want it for?

I want an external PTT line to key a tube amplifier. I already have a ARB 704 Ameritron relay/buffer so would feed into that and that safely keys an amp.

 

[Kristopher burt]

Anyone ever done it? I'm referring to like what would be the aux PTT line like in the back of an amateur rig . Let's use the 2950 or Stryker 955 for examples . Anyone ever do this ?

I have and it worked out well for me. I have and older 2517 that I kinda Frankensteined with mods or improvements to my desire. With that large of a box and chassis I had plenty of room to experiment. All I did was I tapped into the microphone jack itself on the inside of the radio. I left everything the way it was stock but I just added one wire to the hot or ptt pin and one wire to the negative pin or what ever pin it is that it used for ptt on the mic jack. I drilled a hole on the rear of the radio and added a 1/4 phone jack. Then all I had to do was make or buy a momentary push button to use as a ptt switch. I even wired an xlr jack to the back of the radio so I could use a studio mic without all of the adapters. Both worked out well. The best part is you can still revert back to stock if you wanted to or just hook up the studio mic in the rear of the radio. But that also gives you an input to run rack gear into the rig to sound even better. People will say you shouldn't do that because it's not the proper way. For me it was an experiment that worked just fine. In the picture it shows I added the SEND jack which is the ptt. I also added the xlr jack and extended frequency coverage more than what is on the front of the radio.

 

[nomadradio]

I sell a pc board with a relay that uses the radio's internal "transmit-only" switched voltage to activate the relay. It has two outputs. How many users have two amplifiers in line to key this way? Enough of them asked to get the feature added. The relay has enough current/voltage rating on the contacts to key whatever amplifier you have direct, no keying box needed.

https://www.ebay.com/itm/1143644460...d=link&campid=5336136228&toolid=20001&mkevt=1

And if you want to just roll your own, I can probably dig up the schematic for anyone interested.

73

 

[nomadradio]

This page shows how to install in a 2950-based base radio like a 1990s SaturnTurbo or 2990.

http://www.nomadradio.com/OldNomadWebPages/KBTurbo/index.htm

73

 

[Xjeepguy]

Appreciate your posts guys, good stuff there! Good work there on your radio Kris!