The use of PTT signal is not required because this radio is a receiver. 05/14 Click here for technical info on this discontinued model: UH34 Icom IC-R8500 1199.95 SOLD Wideband Receiver The Icom IC-R8500 receives from 100 kHz to 1999.99 MHz (less cellular) in AM, LSB, USB, CW, FM-N and FM-W. The following images show the sampling point for the IF signal and for the power supply for the buffer interface. Radio comes with the Icom AD55A AC power supply and both the owners/service manuals.
We now proceed to identify the exact points on the printed circuit board where to take the IF signal to be sent to the IFace. The following image shows the portions of the schematic diagram of the IF UNIT where we can see the exact points where to sample the IF signal and the power supply. The following image shows the block diagram of the radio and where to get the IF signal. Uses outboard AC adaptor instead of inboard power supply. The IF frequency chosen is 10.7 MHz and our SDR panadapter will be tuned to this. Verdict : The large Icom IC - R8500 is a scanner that happens to cover world band, rather. We are interested in the second IF frequency (this makes it easier to operate the panadapter). Icom JAPAN-CR 293 High Stability Crystal for Ic-r8500 Receiver,Tracking Number. This radio uses several mixers with complex architecture. Icom JAPAN-CR 293 High Stability Crystal for Ic-r8500 Receiver,Tracking Number. The operations to be carried out are very simple, it is sufficient to obtain from its wiring diagram the information on the points where the IF signal has to be taken. Current drain (at 13.8 V DC), Standby 1.8 A Max. Our buffer interface named IFace can be used to add an SDR panadapter to the Icom IC-R8500. Power supply requirement, 13.8 V DC 15 (negative ground) or 117/220/240 VAC (AD-55/A/V).