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OK, I hope I can describe this correctly, without going into all the details. Magnum 257 HP(hard wired to battery), Sirio Megawatt 4000 with the 145 Mag mount on roof of Toyota Highlander. SWRs very low like 1.3-1. Antenna is located center line, but forward (short coax) and this puts it...

Coax is to short for my install :cursing:, and I have read several post on replacing it - looks straight forward no problem,... now do I need to... figure out the Resonant Frequency of my antenna, and how do I figure that :confused:, so I can calculate the length of coax. Sirio MegaWatt 4000...

OK ... you guys have lead me to the Sirio 5000, and I need to know what is the height from the bottom of the mag mount to the tallest part when folded down ? To know if it will clear my garage door in the folded position. I can't find any specs stating the folded height. Also why choose...

On my conversion board, the diode from pin 1 down to pin 3 is resting on pin 2, I mean it is touching the #2 pin. Shouldn't I be concerned about it over heating by trying to jump at the con 2 position, well I am. I'm no expert at soldering, I'm afraid of cooking the diode. Question #2...

To all the members that have helped me, and not even known it. I was ready to upgrade to a SSB and just thought I knew where to start. During many hours of research and making notes I ran across this Forum, ...and it changed everything I had been doing to find a radio to suit my wants. In...

Thanks to ALL of you for this great forum, I've learned a great deal in the last couple of weeks about radio's and which one to fit my needs and more. I've decided to go with the Magnum 257 HP, but now where to buy. Only a few of the web sites that have been suggested are indicating they have...