sam am I
Commander
- Joined
- Jun 26, 2013
- Messages
- 2,169
I have, as some here perhaps do, a VHF marine radio(mine probably older type then most) in my boat. And perhaps like mine, some are mounted permanent types that just have a single small'ish speaker internal to the unit's box.
Well, when running, I can't hear the thing worth a crap If I had too even though it's just inside the Cuddy. So beings I'm frugal, I had to fix the thing the other day(No xmit....bad solder joints in VCO) and noticed it has an external speaker plug and since I have just a simple AM/FM radio(no aux in) I though, if I could just wire that VHF's external speaker output signal via a jack it into the boats radio speakers, I could at least hear it.
So this thing is wired such that if you push the monetary switch, it cuts out the radio's speaker signal and latches the relay's such that the VHF's speaker signal is routed to both L & R(and remains on the little speaker as well) radio speaker's. If then the power to the VHF is cycled off, it reset's the relay's and returns to the radio signal.
The VHF audio driver IC needs to be capable of driving 4 ohms BTW if the radio's speakers are 8 ohms for example(as in my case). I'll snap a few photo's as built and post them, I just went to RS tonight and got some parts. I might see if I can get it in a small box, not sure, probably should.
Anyway, just an idea on a ride home from fishing the other day and though someone might have similar ear's and setup and could use something from this...........nothing earth shattering.
Well, when running, I can't hear the thing worth a crap If I had too even though it's just inside the Cuddy. So beings I'm frugal, I had to fix the thing the other day(No xmit....bad solder joints in VCO) and noticed it has an external speaker plug and since I have just a simple AM/FM radio(no aux in) I though, if I could just wire that VHF's external speaker output signal via a jack it into the boats radio speakers, I could at least hear it.
So this thing is wired such that if you push the monetary switch, it cuts out the radio's speaker signal and latches the relay's such that the VHF's speaker signal is routed to both L & R(and remains on the little speaker as well) radio speaker's. If then the power to the VHF is cycled off, it reset's the relay's and returns to the radio signal.
The VHF audio driver IC needs to be capable of driving 4 ohms BTW if the radio's speakers are 8 ohms for example(as in my case). I'll snap a few photo's as built and post them, I just went to RS tonight and got some parts. I might see if I can get it in a small box, not sure, probably should.
Anyway, just an idea on a ride home from fishing the other day and though someone might have similar ear's and setup and could use something from this...........nothing earth shattering.
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