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#1
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Questions for FT857 owners
I installed an FT-857D and ASAT-120 on my old Nissan pickup -- took a couple
of days what with running power cable, modifying an antenna mount, grounding everything, etc., etc. First contact from the Mississippi Gulf Coast was a YU1 on 20 meters at 1500 CST. Now -- here's my question: Do I have to TUNE and INIT the antenna each time I change bands? As you know, to TUNE the antenna you use the FUNC and SELECT to go to menu k, hit the A button -- TUNE -- then, hold in the A button for one second -- which causes the antenna to tune. Do I have to do this each time I change HF bands, or, does the rig do this automatically after I TUNE and INIT the first time? Thanks. -- ----- Joe S. |
#2
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Joe:
Every time you change bands, you need to Tune the antenna. The radio will NOT automatically tune to the new band when you change. Trying to transmit into the antenna while on the wrong band will only cause you grief. When I had the atas-120 on my 857, I left the menu at the correct place that I could just press the tune button (A). You should be aware that according to Yaesu, you should only Tune when stopped, not while driving down the road (of course, nobody I've ever talked to bothered with this restriction, and I didn't even know about it for the first six months I owned the antenna). The combination can be fun for awhile, but depending on how you have the atas-120 antenna mounted on your truck, you may find it isn't exactly the best antenna for mobile use... First, if you have it mounted high enough to get out decently, (like at the level of the cab roof) you will likely be replacing whips as they break off. Second, unless the mount is extremely stiff and free from vibration, the internals of the antenna will desolder themselves occasionally... Fortunately, both are easily fixed (a larger diameter whip helps considerably in keeping the breakage down, and the two main solder joint failure points are easy to re-solder when they go bad.) Still, I replaced the whip three times before I drilled out the whip socket and used a larger diameter whip. (If you use a slightly longer one, it also tunes easier on 40 meters). I only used it for HF from 40 to 10 meters, as I have a separate antenna for 2meter use. The atas-120 really is a pig on 2 meters, even fully collapsed. I finally just got tired of it failing at odd times, and switched to a set of Hamsticks. Cheaper, more reliable, only takes a few seconds to swap out (though I do have to stop to change bands), and they seem to get out a bit better. Good Luck --Rick AH7H "Joe S." wrote: I installed an FT-857D and ASAT-120 on my old Nissan pickup -- took a couple of days what with running power cable, modifying an antenna mount, grounding everything, etc., etc. First contact from the Mississippi Gulf Coast was a YU1 on 20 meters at 1500 CST. Now -- here's my question: Do I have to TUNE and INIT the antenna each time I change bands? As you know, to TUNE the antenna you use the FUNC and SELECT to go to menu k, hit the A button -- TUNE -- then, hold in the A button for one second -- which causes the antenna to tune. Do I have to do this each time I change HF bands, or, does the rig do this automatically after I TUNE and INIT the first time? Thanks. -- ----- Joe S. |
#3
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Rick:
Thanks for the advice. That's what I figured out -- I leave the menu set on TUNE DOWN UP and when I change bands I hit the TUNE button and wait a few seconds while it tunes -- which it does quickly. I have a small pickup with an aluminum cap on the back with a ladder rack on the cap. I mounted the antenna on the ladder rack so it is essentially mounted in the center -- more or less -- of the truck. I made some jumper cables using #10 stranded wire and ring terminals to bond everything -- I connected these jumpers: -- Bolted one to the side of the FT857 where the mount bolt goes and bolted the other end to the floor of the truck -- loosened the bolt holding the seat to the floorboard and put the ring terminal on that bolt. The FT857 is on the floor under the seat. -- Connected one jumper from the antenna mount to the ladder rack, bolted through at each end. -- Connected one jumper from the frame of the cap to the bed of the truck. I have been using the rig for just over 24 hours and have made a number of contacts from the Mississippi Gulf Coast to all sections of the US, Europe, and South America. -- ----- "Rick Frazier" wrote in message ... Joe: Every time you change bands, you need to Tune the antenna. The radio will NOT automatically tune to the new band when you change. Trying to transmit into the antenna while on the wrong band will only cause you grief. When I had the atas-120 on my 857, I left the menu at the correct place that I could just press the tune button (A). You should be aware that according to Yaesu, you should only Tune when stopped, not while driving down the road (of course, nobody I've ever talked to bothered with this restriction, and I didn't even know about it for the first six months I owned the antenna). The combination can be fun for awhile, but depending on how you have the atas-120 antenna mounted on your truck, you may find it isn't exactly the best antenna for mobile use... First, if you have it mounted high enough to get out decently, (like at the level of the cab roof) you will likely be replacing whips as they break off. Second, unless the mount is extremely stiff and free from vibration, the internals of the antenna will desolder themselves occasionally... Fortunately, both are easily fixed (a larger diameter whip helps considerably in keeping the breakage down, and the two main solder joint failure points are easy to re-solder when they go bad.) Still, I replaced the whip three times before I drilled out the whip socket and used a larger diameter whip. (If you use a slightly longer one, it also tunes easier on 40 meters). I only used it for HF from 40 to 10 meters, as I have a separate antenna for 2meter use. The atas-120 really is a pig on 2 meters, even fully collapsed. I finally just got tired of it failing at odd times, and switched to a set of Hamsticks. Cheaper, more reliable, only takes a few seconds to swap out (though I do have to stop to change bands), and they seem to get out a bit better. Good Luck --Rick AH7H "Joe S." wrote: I installed an FT-857D and ASAT-120 on my old Nissan pickup -- took a couple of days what with running power cable, modifying an antenna mount, grounding everything, etc., etc. First contact from the Mississippi Gulf Coast was a YU1 on 20 meters at 1500 CST. Now -- here's my question: Do I have to TUNE and INIT the antenna each time I change bands? As you know, to TUNE the antenna you use the FUNC and SELECT to go to menu k, hit the A button -- TUNE -- then, hold in the A button for one second -- which causes the antenna to tune. Do I have to do this each time I change HF bands, or, does the rig do this automatically after I TUNE and INIT the first time? Thanks. -- ----- Joe S. |
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