Cobra 29ltd and other radio channel mods

[dss56]

I want to channel mod a cobra 29ltd and a few other am cb radios that need to be modded with a crystal injector board.

Would anyone out there have a schematic to make a 2 or 3 xtal injector board and the schematic and parts list.

Much appreciated for the help

[silverstreak]

Price wise if you have to buy the xtals you probably be better off get a Lescom board.Easy to install and gives you 40 up and 40 down.Just a thought.

[51]

this should work for you. they have the full schematic and install instructions for free. cant beat that. you can buy the pc board from them with detailed plans for $12. [Please login or register to view this link]

[dss56]

Thanks for the reply. I know have the Expo 100 A kit wit 40 up and 40 down I have the pc boards made and was able to locate xtals for the kits.

Also had the expander 240 and 160 boards made.

I aslo had the Expo 100 S+ and S- boards made waiting on the xtals for these.

The Xtals are very hard to get and have made. Most Chinese Companies minium 1000-2000 xtals per frequency they have the best price. US companies i checked want 20$-$30 dollars a xtal with 500 minimum got a quote of $4660.00 from Crystek my answer was no.

So i had 100 boards made for know to see how things go can have more if people want to add channels to their radios.

I will also be supporting the pll 8719 chip with kits for them. Some people just dont want to mod the pll but will add a switch kit with the expander 240 board. Any inf needed please ask