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eHam Forums / Elmers / RE: earbud microphone adapters
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on: January 23, 2010, 05:48:53 AM
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My older cordless phone boom mic / headset has only a single earphone and no PTT, so it terminates with only a stereo sub-mini phone plug. I plug that into an adapter cord I built, which has an in-line PTT switch and terminates with an 8P round plug. That in turn mates an Icom OPC589 adapter, so I can use it on Icom rigs with RJ45 mic jacks. But we are all falling behind the curve here. Someone has already figured out how to make a wireless Bluetooth earbud / mic work on a ham radio. What next?
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eHam Forums / Elmers / RE: icom rj45 to 8 pin conversion for Icom SM5 mic
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on: January 23, 2010, 05:26:00 AM
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There is also the Icom OPC589 adapter, which has RJ45 one end and 8P-round the other. Note: The Heil adapter to mate his proprietary aftermarket mic to an Icom is not wired the same as the OPC589. I don't think the one volt difference is going to matter for the cartridge, assuming it's an ECM.
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5
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eHam Forums / Elmers / RE: vanity or systematic?
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on: January 23, 2010, 03:57:17 AM
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If you didn't pay at renewal, do you loose your license or do you revert back to your previous, systematic, call? Or maybe the next systematic callsign from the appropriate group? 73 - Paul - N9GXA ------------------------------------------------ If you don't pay, you don't play. Once your previous call is surrendered, there will be no "reverting." It becomes someone else's next vanity call, up for grabs. If you're "lucky," you might even get to BUY it back yourself. And when they decide they have enough captives in their callsign lottery, they can suddenly hike the price to, say, $100. What will you do then? Keep paying to hang onto a call that means something only to you, or take the next KABC5XYZ that spits out of the roulette machine? Every day now, I hear new ops brandishing preferred 1X2s and 1X3s that they couldn't possibly be old enough to have obtained first time around. Who are they kidding?
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6
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eHam Forums / Mods And Repairs / VX-5R
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on: June 01, 2009, 08:56:05 AM
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As a practical matter, questions like these are bound to keep coming up again and again. That's because FCC's severe limitations on FRS leave its effective useful range even worse than those CB toy walkie talkies of the 60s era. It's beginning to backfire on them, with the introduction of dual service combination FRS/GMRS radios. People who buy them don't know the differences in the two services, much to the alarm of the GMRS community. FCC should lighten up, and allow external power and antenna connections to FRS radios, even if they don't relax the stiff transmitter power limit. Most of these radios are used in far off-road places anyway, where better range and more reliable DC power wouldn't hurt a thing. Several of us tried to use FRS in a convoy during a hurricane evacuation, and the range from car to car was about as far as you could still see the next car. Absurd.
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eHam Forums / Mods And Repairs / MOTOROLA FR 50 Power Modification
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on: June 01, 2009, 08:51:59 AM
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A lot of these thoughts will seem to contradict some that I originally posted on this topic. So be it. Consider it the "other" side of the coin:
As a practical matter, questions like these are bound to keep coming up again and again. That's because FCC's severe limitations on FRS leave its effective useful range even worse than those CB toy walkie talkies of the 60s era. It's beginning to backfire on them, with the introduction of dual service combination FRS/GMRS radios. People who buy them don't know the differences in the two services, much to the alarm of the GMRS community. FCC should lighten up, and allow external power and antenna connections to FRS radios, even if they don't relax the stiff transmitter power limit. Most of these radios are used in far off-road places anyway, where better range and more reliable DC power wouldn't hurt a thing. Several of us tried to use FRS in a convoy during a hurricane evacuation, and the range from car to car was about as far as you could still see the next car. Absurd.
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eHam Forums / Mods And Repairs / Using a 2m ham radio on marine VHF. A warning.
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on: June 01, 2009, 08:02:07 AM
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Owen, it sounds like just a fluke that the rig failed, after it had been working satisfactorilly on the second band only 10 MHz above the first. I haven't had any such problems with several transceivers I use that way. Now back to your regularly scheduled brow beating and berating from the self appointed radio police.
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eHam Forums / Mods And Repairs / Icom 706 MKII for Aircraft
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on: June 01, 2009, 07:39:35 AM
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See if you can contact 9K2AI. He is trying to do the same thing. Beware mods for European or other versions that use boards different from yours. Now back to your regularly scheduled berating from the self appointed radio police.
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eHam Forums / Mods And Repairs / Air Band for IC-706MIIG
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on: June 01, 2009, 07:33:03 AM
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I can get the rig to transmit well above 130MHz and below 110MHz, but it drops off in the vicinity of the air band. Probably a band pass filter in that region that you would have to modify. Sorry I can't help more. Beware of mods you find on the web. Some are for European or other versions, using boards different from yours.
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eHam Forums / Mods And Repairs / ICOM 706 mk2 g Extend transmit freq.
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on: June 01, 2009, 07:18:26 AM
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If the rig was sold/purchased before the band opened, I don't believe it would transmit there. There are mods on the web, but beware that some are for European models which don't use all the same PC boards/circuits. I did the mod for mine, and it is easy and works.
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eHam Forums / Elmers / 22 1/2V battery eliminator for geiger counter
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on: June 01, 2009, 07:06:22 AM
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Lots of good ideas here, especially from HTR. I agree, if the 22v powers only an audio output stage, scrap it and go solid state. Look at an LM380 to drive a little speaker, as one option. An LM150, LM350 or similar variable voltage regulator could be set to put out 22v or anything from 2 - 37v if you still need that. Twenty-plus years ago, Sandy's Electronics in Canoga Park, California was still carrying those B and C batteries for old portable tube gear, but odds are against it today.
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eHam Forums / Elmers / RF Ground Newb Problems
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on: May 28, 2009, 02:41:11 PM
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Wow, there's actually some better information here than I would have expected. Over the years, I have heard more nonsense than anything from hams about grounds. I have always laughed when I've seen hams use thick, heavy and unwieldy braid and copper straps and rods for ground connections. Taking my cue from the little green ground wire on the third leg of the AC power plug, that's the biggest I've ever used, whether for DC or RF. It's always worked. For lightning, I use nothing at all because I assume that nothing will save from a direct hit and all will be fried beyond recognition.
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