I took the time to tune this antenna to work on these two frequencies and got 1.25 swr at 152,000 Mhz and 2.00 swr at 465,000. In the frequency of the whole band of two meters 1.00 swr. In 70 centimeters I got 1.90 swr. In the frequency 500 Mhz 1.5 swr. Where better tuned was with all parts of the antenna full inputs. My conclusion is that it is not possible to do the tuning with this antenna for these two frequencies at the same time. If you are looking for an antenna for the frequency 151.820 Mhz (Swr 1.25) and at the same time have 144 and 148 Mhz (Swr 1.00) this is the perfect antenna.
Verified purchase: Yes | Condition: New
I did not realise it did not have a standard SO-239 mount but a NMO type fitting. and the only place I could get an adaptor AD-25M to convert a SO-239 mount to accept an antenna with an NMO connector was from the USA . It has become quite an expensive exercise Also says it has a fold over hinge included. Which is a lie as it has no tilt on the antenna anywhere unless they have glued it down??????
Verified purchase: Yes | Condition: New
This is a replacement for the same antenna that I've been using for almost 20 years. My last antenna still worked, but was a little bent up and the black paint was coming off. Since I had to replace the coax in my truck I figured I would replace the antenna too. This is a fantastic antenna and I really like it.
Verified purchase: Yes | Condition: New
This antenna has excellent propagation qualities. It is nearly flat on both bands and on all power levels (5w to 45w on my radio) with nothing greater than a 1.3 VSWR (this is better than published for me). It is mounted on the roof of my Nissan Frontier with a mag-mount NMO. Have had great reports on it from other hams on Simplex. I got it because my other antenna didn't have the greatest receive. There is a big difference on RX for me, which is good. Also, according to my antenna analyzer, it tunes up almost flat on 222 MHz as well... nice surprise there.
Verified purchase: Yes | Condition: New
I have several antenna that i use and this one is my favorite so far. best gain and wide bandwidth make it very versatile. I bought another one just in case something happens to this one
Verified purchase: Yes | Condition: New
This is a replacement for two other diamond sg7500. They broke upon smacking tree limbs. I held the second sg7500 together with glue ,electrical tape and ty wraps for 3 years. The comet appears stouter and signals are the same on remote stations. Time will tell
Verified purchase: Yes | Condition: New
No tuning required SWR 1:05 both bands 27th and 440. Great coverage. Hearing a repeater I couldn’t with shorter and cheaper antenna. Will purchase another for my 2nd vehicle.
Verified purchase: Yes | Condition: New
Built well, great reception and transmit. Haven't quit figured out how to lay the antenna down, but not a problem. I have a normal short car.
Verified purchase: Yes | Condition: New
This is an outstanding, broad band antenna with better VSWRs mounted on the bed rail of my two trucks than several other Comet and Diamond antennas and is now my gold standard others will be measured against.
Verified purchase: Yes | Condition: New
Wanted a dual band but the package says 28m-1.3ghz haven't tried HF but the air bands come through great in addition to the 2m and 70cm
Verified purchase: Yes | Condition: New
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