Vincent Keene wrote:
The only problem we had was the in-car volume was too low at speed. I bought a small MP3 player type amp called the "Boost-a-Roo", which increased the volume level in helmet and and solved that problem.
Hot dang! Thanks, I been wanting to get an amplifier setup but hadn't had a chance to follow up. My hearing has degraded to the point it's real difficult to hear the student although they can usually hear me (at least the younger ones ';)
I see one possible problem. Perhaps you can answer this. Is it possible to input a headset with both a mike and a speaker phone since the headsets for most comms combine both in a single cable and plug (three conductors). Reason I ask is the Boost-a-Roo seems to be specifically for amping a speaker input from stereo (aux) or radio which implies the jack only has speaker conductors and wouldn't account for both headset speaker and mike.
The Boost-a-Roo with its single cable and jack would need to 'pass' the mike signal through the Boost-a-Roo to the comm. Of course one can mod the unit by splicing jacks into the 'headset speaker' conductor for the in and out of the amp. A 'by-pass' for the mike condutor Have I got that right.
One issue with trying to splice comm headset conductors (at least the Nady) is the type wire. They are REAL small and difficult to solder. We did manage to repair a headset wire that had pulled lose from headset, but not easy or 'neat'.
Anybody got any other options than splicing.
Hey I just had a thought. Use a stereo adapter (out) connector and plug in headset. Using decent wire split the output of the adapter. Plug in the new audio only lead from headsets with a plug on the other end into the amp. Then rejoin the comm circuits with a 'reverse' routing to a single plug into the comm.
Hope I got the above explanation right. The basic idea here may be accomplished by a different wiring diagram or parts that's more elegant. Anybody got suggestions.
I just had another idea. Could you plug the extant headset plug which is AFAIK a std stereo plug into the amp which would have two channels out for stereo audio. Essentially the audio from headset would be correct for one of the amp out stereo circuits, but the mike signal would be on the other stereo circuit's output as input. Can you 'run the amp backwards' so to speak, amping both signals. Sure would simply things. In fact if my thinking ain't too wo out by now it looks like this would require only a stereo cable from amp to comm unit. No splitting of wires, no soldering, no 'roll yer own' adapters, and less cussing. Got a feeling this is a non-starter WAG, but I ain't the sharpest knife in the 'more complicated electronics' drawer soes I wouldn't know other than just trying it, hoping nothing would get fried in the process.
As an aside, anyone know of other volume amps. Perhaps one that would make the above easier. Cheaper wouldn't hurt either.
Just took a quick look at stuff out there. Looks like lots of cell phone amps. It occurred that if they had a model that worked with a cell ph whose 'hands free' jack had both mike and ear bud circuits using the same jack might work. There are lots of signal boosters which aren't what we need, but there also seems to be some 'hands free' units also. Looks like most are 'fixed' inline, which is not very helpful.
To be continued.
Steve 'needing a solution' Coleman
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