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Reviews Categories | Antennas: HF Mobile & Accessories | Diamond SD-330 Mobile Screwdriver Help

Reviews Summary for Diamond SD-330 Mobile Screwdriver
Diamond SD-330 Mobile Screwdriver Reviews: 7 Average rating: 5.0/5 MSRP: $389.95
Description: Screwdriver Mobile HF Antenna
Product is in production.
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You can write your own review of the Diamond SD-330 Mobile Screwdriver.

KG4UHV Rating: 5/5 May 24, 2017 11:07 Send this review to a friend
Excellent antenna  Time owned: 0 to 3 months
I installed this antenna in my pick up truck and the performance is great. Don't hesitate to buy this antenna 73.
ZL3SV Rating: 5/5 Nov 4, 2015 17:53 Send this review to a friend
One of the best - Performance, looks and price  Time owned: more than 12 months
I bought one a year ago and it works very well.
I installed a coil at the base to shunt the antenna to lower the feed impedance on the lower freqs and the SWR is perfect.

Coil is 16 turns on 12mm diameter plastic pipe of about 2mm dia enamel wire.

My Lexus has zero noise on all frequencies so mobile use is excellent. The Lexus is the first vehicle make out of over 70 cars I have owned that has zero noise.

See ZL3SV for a photo on my Lexus SUV
K2PXQ Rating: 5/5 Aug 12, 2015 12:00 Send this review to a friend
Very useful as a portable antenna  Time owned: more than 12 months
Having the need to confront reduced mobility, I needed to find an alternative to erecting my 40 and 20 meter trap dipole while on vacation. The first iteration consisted of a 3/8 x 24 mount clamped to the deck railing, a 40M "Hamstick," and two 33 foot counterpoise radials at 180 degrees to each other. This arrangement worked quite well, but necessitated having a "Hamstick" for each of the bands I'm interested in using. In addition, the relatively narrow bandwidth of such an antenna, especially on the lower frequency bands, requires adjusting the length of the whip to go from one end of the band to the other. I purchased the continuously adjustable SD-330 over a year ago, and I've had good success on 40M as well as surprisingly good success on 75M. The two radials remain at 33 feet each, even on 75M. The screwdriver design permits me to adjust the SWR to 1:1 on 75M and 40M, and 2:1 on 20M--without the use of an antenna tuner. This summer, I'm going to add two 16 foot radials to see if I can get the SWR on 20M even lower. I use a small, 12V lithium ion battery pack to power the antenna's tuning motor, since it draws only about 100 mA. I am very pleased with the SD-330's performance. K2PXQ
MM3PTS Rating: 5/5 Jul 3, 2013 04:01 Send this review to a friend
Great antenna for mobile   Time owned: more than 12 months
I've had this ant for about a year .I use it mainly on 14 ,18 ,21 and 28 Mhzs and mounted on a tri- mag mount .Tuning is simple and the results are great considering the size and made in Japan .
VE9AA Rating: 5/5 Apr 19, 2013 17:24 Send this review to a friend
Still brand new, early days, but...  Time owned: 0 to 3 months
Got in a swap. Antenna never used. I had to buy a mount for it and I bought a Comet HD-5M and put it on my trunk lid of a MINI COOPER. Haven't made too many QSO's with it YET, but have made several on 15m and 20m CW and SSB running just 50w . Seems to be a normal mobile antenna. I used to have a HS-1800/PRO with extension and capacity hat,(a bigggg antenna) so I presume this has less ERP (less gain), but it certainly functions well and is not a dummy load. Still very early days. Only had it on the car about a week and like I said, very few QSO's yet. I don't "foresee" any issues. Hope I haven't just jinxed myself, hi hi ! 73 de Mike VE9AA
N8KBC Rating: 5/5 Sep 4, 2012 19:17 Send this review to a friend
Great small mobile antenna  Time owned: more than 12 months

I bought the SD-330 last year at Dayton to put on my Toyota Highlander for a trip to San Diego from Ohio. I also bought the Better RF 7000 Tune control and screwdriver control. I set up the system shortly before I left Ohio with out a lot of elaborate grounding. I worked both coasts all the way across the country with out any difficulties on 20 M and 40 M. I didn't try alot of other bands then. After I arrived in San Diego I did try the antenna on a variaty of bands and I am very pleased with the performance.
VU2YK Rating: 5/5 Jan 11, 2012 04:52 Send this review to a friend
Great antenna for a Great Price  Time owned: 3 to 6 months
I bought it from HRO, Virginia last year Oct and used it recently on a 300 Km long road trip from New Delhi to Chandigarh on my Honda Accord, mounted on a Diamond K-400C mount.

The antenna looks great with high gloss black finish. Built extremely well like a tank and is flawless performer. I did not have a very elaborate ground setup in the car because I had to leave install in a hurry. Nevertheless, used it on 40 to 10 M with great success and the antenna held it's ground even at highway speeds of 150 Km/h. The tuning is a wee bit fast, but once you get used to it, it's easy to tune in any band, first by listening to the noise, then fine tuning the SWR. I could tune it on all bands from 40 to 10 without problems to 1:1 SWR.

The importance of a good RF ground can not be over emphasized as has been very well documented by K0BG. I had some RF feedback issues with my IC-706Mk2G, but that was probably because I had made another compromise. Used the cigarette lighter as power source. So the power was restricted to some 50 watts. New cars are not so friendly when it comes to wiring straight from the battery. There was no scope in the firewall of my Accord to bring in the heavy gauge wire.

Overall a good solution if you want to cover all bands in a hurry. Efficiency wise, if you want the ultimate mobile antenna, you might have to try a Bug Catcher. But they are not so practical for use on small sedans.

Rahul VU2YK.

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