I agree, 0 reactance suggest resonance if the measurement is taken at the feed point.
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?? Tuning the new Maco V58 ??
- Thread starter Rok55
- Start date
I agree, 0 reactance suggest resonance if the measurement is taken at the feed point.
Thanks for the welcome. I'm amazed at the level of knowledge exhibited by some of the folks here. Great reading, much of it completely over my head, but I am catching on.
Took the V58 down and rechecked / reset everything to mfg spec and put in an RF choke of 5 wraps about 6" down from the feed point. Within 20 mins (6 trips up and down the ladder) I was able to get it tuned in at 1.2 across the band.
Now to fab some standoffs to keep the feed line away from the mast, get some guy lines setup and push it up another 20ft. That'll put the feed point at approx. 29ft.
Q? Is RG8U direct bury or does the feed line need to be in a sleeve underground? Running about 30' from the mast to the house then up the wall to second story.
To maintain structural integrity keeping a sufficient amount of the lowest vertical radiator inside the BA1P base unit, I made initial adjustments at the bottom of the lowest radiator and secondary adjustment at the bottom of the second radiator and final minor adjustment at the hoop ring.
I didn't take measurements after tuning but will when I get up for final install and push-up.
Thanks for all the comments and help ......................
now if I could just figure out how to wire an American Electronics Model 95-328 4 pin powered microphone for use with the 6 pin Uniden
If you bought the radio new there is a 6 to 4 pin adapter in the box. If not then you can do a web search for the adapter.
Thx for the input.
I have a 4 to 6 pin adapter but the Pace wiring scheme is not same as other standards such as Cobra. After a bit of research and tracing out the wiring I did manage to figure it out and get it working and verified Tx, however, the gain control doesn't seem to function.
Hi having some difficultly matching the antenna, your help will be greatly apricated, Vance
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So if your measurements are correct your problem might be in your feed line placement. Also be sure your mast pipe only goes into the base 6", no more. I found my feed point to be almost opposite of what is shown in the directions. Use a sharpie to mark your adjustments so you can find your way back. Trial and error. Remember also that the total antenna length is the lenght of the entire unit, ,bottom of the base unit where your mast goes in to to very top. I think I measured around 250" total length and my feed point was on the lower ring, 4 or 5 inches from the mounting bolt.
I had little problem getting below 1.5/1 and with a little more fiddling and a decent antenna analyzer I know I can do better.
I dialed mine in at 12' and mounted it at 52' to base and it got a tiny bit worse and now I cant reach it ;( do what you have to do with the radiator length and the matching ring to get it as FLAT as possible before it goes into the air ! Mine went from 1:1 at 12' across the 40 to 1:1.03-1:1.7 across the 40 when it went up . If your not flat on the ground it will only get worse ..
Best Omni I have ever owned though ! I had the v5/8 then the radials sagged so I got the 5/8-5000 and its a beefy performer no doubt !!
My 2 Cents , 73's 4-2-Zero New Jersey . Brian
Sir, you mentioned setting up this antenna, I have read discussions regarding overall length measurements taken at different points. Also I am bit confused, perhaps you will shed some light. Isn't the over length for 11 meters 21 to 24 feet
Check at the antenna with a jumper to see what it is at the antenna. It should be darn near flat across the 40 channels. Its not bad for low power operation. But a 1.7:1 will cause stress on any amp or coax connections.
