A good deal(er)

If you are a UK amateur and you like Chinese radios you'd probably never think of buying them from anywhere other than direct from China or Hong Kong, most likely using eBay. Ham radio dealers in Britain are widely regarded (rightly or wrongly) as rip-off merchants who work out the price by replacing the dollar with a pound sign and then adding on a bit more for good measure. Their pleas that the UK price includes VAT and the cost of providing a warranty usually fall on deaf ears.

In one of the discussion groups someone mentioned buying a radio from a British firm called Sinotel UK. I went to their web site and saw that they carried several models of hand-helds from China, including a new one I hadn't seen before: a TYT UVF9 (pictured right.) But what particularly caught my attention was their prices, which were little more than what I have been paying buying on eBay. Their cheapest model, the Vero Telecom UV-X4 (similar to the Baofeng UV-3R) was just £29.99 (yes, a brand new dual band radio for 30 quid.) A UV-5R eas £34.99. The radio that had caught my eye, the TYT UVF9, was £47.99. It would cost me $68.50 from 409shop and I'd have to wait a couple of weeks for it.

I am not associated with Sinotel UK and have not even bought anything from them but if I want yet another Chinese handy to add to my collection I probably will.

Baofeng bother

I like my cute little Baofeng UV-3R+ though I find myself using its slightly bigger brother the UV-5R more often. Unfortunately the UV-3R+ has begun acting up with a fault that is difficult to fathom.

Quite often the UV-3R refuses to switch on. At first I thought that I had accidentally left the radio on and had depleted the battery, because I often do things like that. But the radio comes back to life if you remove and replace the battery or if you drop it into the charger for a few seconds. When I did this today the screen immediately showed a battery voltage of 4.0V which was expected given that it had been charged only a day earlier.

So the radio is failing to turn on even though there is plenty of juice in the battery. Like most HTs it has a "live" power switch and should turn on at the press of a button. The UV-5R on the other hand has a good old-fashioned rotary on/off volume control. Which, I now recall, was the thing that failed on my old Jingtong radio. Ho hum.

QRZCQ?

For more years than I care to remember I've always used qrz.com to look up calls I've worked or heard on the bands. Recently I've noticed that the site wants me to log in every time I try to access the details of a call. Perhaps my memory is faulty, but I'm sure that you didn't used to have to log in to see the basic details, and the site remembered your login for at least a week.  Now it seems you have to log in every day if you aren't a subscriber. This isn't very convenient, even though I understand the reason for it (presumably to encourage more people to subscribe.) I now hardly ever visit qrz.com.

The G4ILO page at QRZCQ.com

Using Google to search for a call I found that one of the first results returned was from a site called qrzcq.com. I didn't at first notice the different URL. QRZCQ has a callsign lookup similar to QRZ.com - it even uses the same URL format - but doesn't require a login to access the details. The site's database already holds quite a bit of information about me - all of it already in the public domain but I won't ask where it came from! I have just registered with the site so as to edit and add to the information shown on the G4ILO page.

I don't know who is behind the new site but they seem to have done a good job on it. The pages look a lot more attractive than qrz.com and they aren't stuffed with ads - though it is early days yet and I suppose the desire to "monetize" the site will come eventually. But right now qrzcq.com looks like a venture that is well worth supporting, visiting and updating your own page.

Change of address

DX Sherlock, the website that has the very useful real-time propagation maps derived from DX Cluster and WSPR spots, has moved to a new site.

The addresses vhfdx.net, vhfdx.info and dxsherlock.com will now redirect to dxmaps.com. If you have bookmarked the site you will need to update your bookmarks.

Fake or genuine?

Buying radio gear on eBay is like gambling. It's addictive, but often you lose. You win often enough to keep you coming back in the hope of finding that absolute bargain.

Is the antenna on the right a fake?

I thought that I would buy a dual-band handheld antenna that was long enough to have a bit of gain but not too long to use in the shack. (I have several gain antennas but at over a metre in length they are not suitable for indoor use.) I have a Nagoya NA-701 which works very well for its length (22cm) so I thought I would get a NA-771 which is 40cm in length and ought to perform a couple of dBs better. I know only too well that there are a lot of fake antennas on eBay so I bought this one from 409shop, or rather from radiobanker which is one of the eBay IDs used by 409shop. The general consensus is that 409shop is a trustworthy trader and doesn't sell fake stuff.

When the antenna arrived I was concerned to see that instead of the silver-on-black label showing the make and model number the details were printed on in blue. I have had other fake antennas with printed-on labels, even ones with the same shade of blue so it was not a good omen. When I tried the antenna on one of my handies I found that it performed no better than the much shorter NA-701.

SWR of the alleged NA-771

I put it on my AA-200 antenna analyzer and found that the SWR at 145.000MHz was about 4:1. There were two dips to the HF of the 2m band, the best of which was at 195.000MHz with 2.7:1. This is not the worst I have found but it explains why the antenna did not perform optimally.

SWR of Nagoya NA-701

For comparison I looked at the SWR of the NA-701 with the silver-on-black label. This was a really good match - better than 1.5:1 at 150.000MHz though closer to 2:1 at 145.000MHz. Given that the resonance at any given time will be affected by conditions surrounding the hand-held antenna that's close enough.

So is the NA-771 from radiobanker a fake or not? The plastic sleeve the antenna came in bears a silver hologram label that says "Nagoya", and the name "Reuex Industrial Co. Ltd." That is the name of the company that manufactures Nagoya antennas and apparently they do use blue lettering.

So I conclude that this antenna is probably genuine and performs as well as it was meant to, which unfortunately happens to be not as well as I hoped. The Nagoya NA-771 is not worth its extra length.

FYI using an SWR/power meter I measured the SWR of the two antennas at 433.000MHz to be: NA-701 3.4:1, NA-771 4:1.