Hello everyone, I'm new to the forum, I've been doing some modifications for friends, putting a homemade VFO on cobras and other radios, I've encountered some trouble with the cobra 29, I have installed the coax and applied the LO to the footprint of the vco, (16mhz at pin 3 on ic2-yd7310s) after aligning the VFO I can move along the band correctly.
The issue comes when I try to tx, I get nothing, I have programed the correct offset of +455khz to the Arduino and I can see the frequency change on the oscilloscope, however no tx.
Is there some pin/cable that has to be pulled down or apply 8v that I'm missing?
I have removed the channel selector and display, as well as the vco and pll
I can see the 10.240mhz oscillator but I'm not sure where to look at next. I should have noted that before the mod, the radio was working hahahaha. I'm also having issues getting the proper schematics and service manuals to work with
The issue comes when I try to tx, I get nothing, I have programed the correct offset of +455khz to the Arduino and I can see the frequency change on the oscilloscope, however no tx.
Is there some pin/cable that has to be pulled down or apply 8v that I'm missing?
I have removed the channel selector and display, as well as the vco and pll
I can see the 10.240mhz oscillator but I'm not sure where to look at next. I should have noted that before the mod, the radio was working hahahaha. I'm also having issues getting the proper schematics and service manuals to work with
