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Reviews For: Diamond SG7900

Category: Antennas: VHF/UHF+ Omnidirectional: verticals, mobile, etc

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Review Summary For : Diamond SG7900
Reviews: 40MSRP: 119.99
2meter and 70cm mobile vertical
Product is in production
More Info:
# last 180 days Avg. Rating last 180 days Total reviews Avg. overall rating
2E0DBD Rating: 2005-10-23
The Poodles Parts!! Time Owned: more than 12 months.
I have owned my SG7900 for about two years now.
I have it installed on a gutter mount on my Daihatsu Fourtrak, and it outperforms anything else I have tried or owned.
Very good performance on VHF, and outstanding performance on UHF.
Good instructions and simple to install.
VSWR 1.2:1 on both bands.
Quality product and recommended 100% by me to all potential buyers.

KA3NXN Rating: 2005-08-16
Junk Time Owned: more than 12 months.
Ok performance on VHF. UHF the SWR is at 2.7:1 and no way to adjust it. Lost the top portion on the antenna and found out that the lock screw on it is epoxied from the factory and there is no way to adjust it. Very poor design. Buy an Austin antenna. Much cheaper, smaller and way outperforms the 7900.
KC5PYO Rating: 2005-07-05
10 years and still working good! Time Owned: more than 12 months.
Got the Diamond SG7900 6/95 from HRO, & mounted it to a Peterbuilt for three years. Now on a Comet RS730 mounted on the family van.
Having used this for 10 years now, would I buy again?
Yep, in a heart beat.
K0MCI Rating: 2004-08-31
No offense but.... Time Owned: 3 to 6 months.
No offense but this antenna deserves a 4 for mag mount use like an 80 meter beam would lose a point for not being good on a 10 ft TV mast.
Again no offense.
The info you find on this antenna says not recommended for mag mounts. Sixty inches long is going to produce some wind load at freeway speed.
It is a solid five for a mobile antenna. I don't think you can find much better.
K6IPF Rating: 2004-06-05
The Best VHF/UHF Mobile antenna Time Owned: 6 to 12 months.
You can't find a better performing antenna for mobile use...I hace both, the SG-7900 and the SG-7800... And both are a install and go system..
The SG-7900(61" tall) is 2ft taller than the SG-7500 at 41" tall... Good performers!!!
P.S. If you need parts for any Diamond Product, The staff at Diamond Antenna are great to work with....
KG4RCP Rating: 2004-04-26
Outstanding & Excellent! Time Owned: more than 12 months.
The Diamond SG7900 is an excellent choice for a dual-band mobile antenna. In my opinion, there could hardly be a better mobile antenna.

I've had the antenna mounted in three separately unique configurations (1.tri-mag mount, 2.special-made mod roof mount, 3.Comet RS730 lip mount -current config) on my Jeep Cherokee and have never been disappointed with its performance.

At highway speeds, through mountainous terrain and in town, the Diamond SG7900 has consistently performed at the highest level pulling in faint signals... and I've never received a bad signal report using it. Even in fringe areas in repeater operation, it has far outperformed other stations' rigs.

The antenna is able to be lowered/folded over and is held in place by a strong spring in the base.

Once, I absent-mindedly forgot to lower it after having parked on the top level of a parking deck and broke the lower condenser coil (not the base coil) as I departed. With a small bit of research and a few phone calls, I was able to replace that section at very reasonable cost, and returned to full operation unimpeded. The sections are held in place with allen screws, and are easily manipulated.

The antenna is rugged and one need not worry about damage from minor-to-moderately sized tree limbs striking it. Mind that limbs large as one's wrist just might pose damage, but smaller ones haven't damaged it - having frequently gone through low-lying branches. The only modification I've made to it is to spray paint it flat black. Its performance remains unimpeded.

The radio that pushes RF through the Diamond SG7900 is a Kenwood TMD-700A.

I would whole heartedly recommend the Diamond SG7900 to anyone!
KD5YQM Rating: 2003-10-24
So far, so good Time Owned: 0 to 3 months.
Haven't had this antenna very long only used it twice. So far, so good. I am new to amateur radio and really can't compare one antenna from another, however from what I've told people about my antenna the SG7900(A) they say that it seems to be working pretty good. I have picked up repeaters as far as 50 miles using my IC-706MKIIG at 50 watts in semi hilly area. Another thing on my package it says SG7900 and on the price tag they have it labeled as a SG7900A. What is the differance and is there a differance?
KD5SRL Rating: 2003-05-11
Great Antenna Time Owned: 6 to 12 months.
Purchased this mobile antenna one year ago with my Kenwood D700A. I was pleased with the range. I had no problem hitting distant repeaters that my friend in the next driveway couldn't seem to hold a strong signal on. SWR was excellent. Would purchase again!

OM5AWT Rating: 2003-05-04
Can't complain Time Owned: 6 to 12 months.
The antenna serves the purpose. Well balanced, especially for 70cm. No tuning needed, fits portable situations, eventually mobile. Seems too heavy for mobile, but is still okay if installed with some extra effort. Choose a firm mount, not magnet. I have done some testing on my second QTH, on the top of 26m high building with very good results. Does not need too much of the ground, or metallic surface bellow. I would buy again.
W8TOL Rating: 2003-04-03
high gain for the mobile Time Owned: more than 12 months.
with it's 5dbg on 2m's and almost 7dbg on the 70cm's bands make it ideal use on the mobile.
my only complaint is,that the antenna is to heavy for single magnet use.the sg-7900 has a so239 connection to the mount and strongly recomended to use a tripod magnet mount for such applications. according to mfj259 analyser i have swr's below 1.5 to 1 across the bands.