At 3/23/2007 13:15, you wrote: >Yep - had a Yaesu 727 handheld with that... the cigarette lighter adapter >had a dual plug with a coaxial plug for operating the handheld and a 1/8" >one for charging the battery. The charger was nothing but a fixed resistor >(1/4w !!!) between the 12v input and the hot side of the battery. The cord >dropped between the seats in teh truck one day and the tip of the 1/8" >plug touched the steel seat slide. POOF! went the 1/4 watt resistor.
How about the external power connector on the FT-708? Coaxial power plug with the + side on the OUTER RING! Dummmmbbbbb! Bob NO6B >I replaced it with a LM317 adjustable voltage regulator chip set to result >in zero current when the battery was fully charged. And the current was >limited to prevent overcurrent damage to the battery. >Crude, but effective, and 100% junk box. > >Mike > >At 01:07 PM 03/23/07, you wrote: > >Gotta be better then using one of those 'mini' or 'micro' earphone plug > >style connectors! > >You know where the center pin shorts to the outer contact briefly while > >your inserting/removing? > >ZAP! > >-- > >Jim Barbour > >WD8CHL > > > > > > > >Robin Midgett wrote: > > > Personally I don't like the RCA connector for power use. Assuming the > > > female is chassis mounted, as it has been on a number of pieces of > > > equipment (DEMI transverters come to mind), that means there's a > > > mating male connector with +12VDC on the exposed pin, just looking > > > for something to short out with. Granted, it may see very few > > > insertions/extractions, but when extracted it exposes a live pin. A > > > pigtail on the equipment with a male connector could be used, making > > > the power source available on a female inline connector. > > > PowerPoles are a much better choice IMHO, and they can be chassis > > > mounted with some insulating shoulder washers, like power transistors > > > & banana connectors often are. > > > > > > > > > At 11:43 AM 3/23/2007, you wrote: > > >> How about using an RCA connector for power? I have a TX/RX Systems > > >> preamp that has a male RCA plug threaded into the case to supply it > > >> with 12 VDC. > > >> > > >> Chuck > > >> WB2EDV > > > > > > > > > > > >Yahoo! Groups Links > > > > > > > > > > > > >Yahoo! Groups Links > > >
