VX-427 Problem

[LunaEros]

I got a used VX-427 I want to use at work with their system. I’ve seemed to figure out most of their system as in the frequency, modulation mode 11K0F3E (which I figure is determined by power setting, the other my radio uses is 16K0F3E), etc. I also got the programming cable and software for it. But I just figured out another issue the radio has and am not sure if it’s some setting I can’t find. I also have a BaoFeng I can use to listen to it and realized that when I first key the VX I hear a carrier and when I try to talk it sounds muffled almost like distortion or something solid over the mic but discovered if I keep it keyed up, after 5 seconds it sounds like the mic turns on and I can hear fairly normal.
Does anyone have any idea why it might do that? Could it be a setting or is something wrong with the unit?

 

[radiotweester]

11 is narrowband 2.5kHz deviation, 16 is wideband 5kHz deviation You're muffled because you're listening for a 5k voice where there's only 2.5k. I'm guessing you're using a 427-4-5 and not the 427A LTR version? On UHF narrowband is the STANDARD for UHF 450-470 and most VHF 150-174. In the CE-64 software set the W/N to N and if you're still quiet, go to Common -> Power Saving -> Mic Gain and set it to +6
Using the noise cancelling mic can also cause that.

 

[LunaEros]

I know it's not the bandwidth because after about 5 seconds or so keyed up it works fine. And it's not the Mic Gain either because it does the same whether it's set on standard or +6db.

 

[radiotweester]

I'd stick it on a service monitor. It's not what everybody has in their cave, but it would be the best thing to see what's going on with power/time and deviation.