Is it possible to kill the forced talk back feature on the Road Devil RD104E power mics?
None of the radios which I own have a t.b. feature but this mic forces it no matter the power level & with it, horrible squeal if the power is beyond 1-2.
Hopefully there's a potentiometer inside to dial it all the way back, this is driving me nuts.
Trying to use the p.a. function with this is an exercise in futility. When doing so it must have cooked something on my garbage unidens (880 & 980) as turning on the p.a. now transmits the whatever is being received over the radio.
I triple checked the jacks & the p.a. is in the correct outlet. To stop this, the squelch has to be on 100% & no external speaker can be plugged in as it will pick up the forced t.b. over that, making feedback like nails on a chalkboard. This even occurs on older Cobras & *GASP* Galaxy radios as well.
Any ideas on a remedy?
I've tried another cheapo power mic (possibly Workman, just has a silver "power mic" emblem. No other info present) but get a similar issue.
Never had this problem with my Turner +3 but that's long gone & any currently on the market have been "clipped" at the connector yet still command an insane premium....which no one is paying but the same listings remain.
I need a power mic as standard/noise cancelling require shouting on my behalf to be heard on the airways.
Not exactly a fan of doing that, especially when there's no background noise present necessitating it.
Really kills your throat if you plan on talking for any period beyond a couple seconds.
Any procedure(s) for defeating forced talkback on Road Devil mics?
Discussion in 'CB Radio Forum' started by GGALLIN1776, Apr 27, 2023.
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Is this a brand new Mike? I can't find anything on specs for this mic that says it supports talk back. As far as I know, it's the same ceramic mic as the Astatic D104-M6. With the road devil having red plastic enclosure instead of black. The only trim pot in these microphones is there to adjust the gain of the eletret mic element only. No talk back.
I own a D104-M6b, bought back in 2011, it's basically brand new, I never used it in the truck I drove. I didn't really care for the bulky square design for some reason. Later I bought an Ranger SRA 198, modified the mic amp in the cobra 25 I was using. It sounded great.
The bottom picture is the internal circuit of the Astatic D104 mikes that I created on a perf board. I always thought these mics sounded like they had a little too much base. I think it's due to the 3300uh choke they use. Of course these microphones are famous for a scratchy or noisy PTT switch. I ordered a couple of switches that are suppose to be better quality wise. I've never used them since I haven't used the mic enough to develop this noisy problem. Maybe someday.... Ha.GGALLIN1776 Thanks this. -
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