Once the temp control circuit kicks in, the fan goes into high-rpm mode!!! Then returns to ‘normal’ operation with the 2W / 100ohm resistor voltage. Top – right front N/A (below 85.5F unable to get reading)Īfter cw keying for aprox 5 min continous duty the heat generated by the IC-7000 did rise enough to enable to the temp control circuit. Tempurature Measurements were made with a baby-tempurature thermometor ( sorry its all I had at the time ).
Use a baby thermometor ( the electric kind w/ the digitial readout ) and see just how hot your rig is running before preforming the mod, I know most all of my readings were over 106F then the thermometer errored out as the temp was too high. READ ALL OF IT BEFORE PREFORMING THE MOD! Unsolder one side of the second diode from the front on the left and lift up one side (or remove, slip to the side, whatever turns you on).They are in two columns, “left” and “right” Locate bank of SMT diodes (silver with “K” on top on one side) in front of the target shift register.The “middle” shift register if looking from the front of the radio is the target.We’ll call the two stacked the “left” ones There are two next to each other and then a couple more. Locate four shift registers and bank of diodes – shift registers are 4094’s.Remove CPU/DSP unit by unscrewing three silver screws holding it down (the silver box on the top of the radio with copper taped sides) and pull up.Next follow the ORANGE wire from the ATU molex socket on the back of the radio to where it is soldered on to the DDS unit (top right hand corner at the back of the radio) and attach the remaining resistor wire to this point, position the resistor and wires so that they look neat and tidy and then refit the fan and the top cover, mod is now complete. Cut the red wire to the fan and attach one of the resistor wires between the two halves and cover with heat shrink tubing. Take a 100ohm resistor and solder a length of wire to each end and cover with heat shrink tubing. I have performed this mod on MY OWN radio without any adverse affects and my LDG AT-7000 atu still works as it should.īefore this mod after been turned on for an hour or so the temp meter on the radio would show around 50% on the scale (7 or 8 bars), after the mod the temp meter shows around 25% on the scale (4 bars).įirst remove the top cover and remove the fan from the radio, !!IF YOU DAMAGE YOUR RADIO YOU ONLY HAVE YOURSELF TO BLAME!! !! IF YOU ARE UNSURE ABOUT PERFORMING THIS MOD DON’T!!
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