The accessory (or microphone) jacks should provide three (3) interface functions: 1 = Transmit Audio in, 2 = Receive Audio out, 3 = Push-to-talk (PTT). These accessory jacks or ports will vary make to make, & model to model, from the; 6 pin Mini DIN, 5 pin DIN, 8 pin DIN, 13 pin DIN, or RCA (phono) jacks, etc. Where the microphone jack is used as an I/O port, the External Speaker jack is normally used for receive audio. BACK To Main Index All text and graphics on these pages are ©®™ of G. Rogers Sr and BUX COMM Corp 1985 - 20 10.

The IC-756Pro III received FCC certification on September 9, 2004 under FCC ID AFJ217800. Icom unveiled the new IC-756Pro III at Tokyo HamFair 2004, which took place on August 21 and 22, 2004. The IC-756Pro III incorporated the following changes as compared to the IC-756Pro II:. 2023 by Fashion Diva. Proudly created with Wix.com White Facebook Icon White Instagram Icon White Pinterest Icon White Twitter Icon White YouTube Icon. Icom 756 Pro 3 Serial Numbers.. Share on Facebook0. Share on Twitter0. Please reload. Create Your Site. You can do it yourself!

Asio Driver Pioneer Ddj Ergo Virtual Dj here. The 746 original all of the 756 line 756, 756 pro, and proII all use the same drive IC. There is varying degree of discussion why IC151 fails.

Regardless since the IC has a high rate of failure in the 746pro. This clearly means the 746pro has design issue that ICOM is not really clear about. I have a 746 original that a got three years now and IC151 has not failed. ICOM claims that it is a static issue, but I find that hard to believe. It is my understanding that 746 pro drive IC 151 with a high voltage which means it is dissipating more heat. So you guess is as good as mine why this part only fails in the 746 Pro.

My rig never did fail. I think what happens with issues like this is that a certain small percentage of radios fail, either because of marginal design or marginal components, and the issue gets a little blown out of proportion.

Having said that, at one point, I thought that one of the relays in the antenna tuner had failed, so I sent the radio to, which is an authorized factory service center here in Michigan. This service center has a great reputation. They didn’t find a problem with the antenna tuner, but they did add all the design changes, and I haven’t had a lick of trouble with the radio since.