HOW GOOD IS SW IN YOUR RADIO ?
This last Sunday I was a so booored that I had nothing better to do than play with my radios (What else?) so I did a competition among them to find the best performer on shortwave with the help of my trusty digital generator RE 107
About the Signal generator SG
RE Radiometer 107 Synthesized Signal Generator
The brand is RE and the model number 107 I don´t know much about it because it was a blind buy from Ebay but it seems to be very accurate like a lab equipment, I don´t know if its output is calibrated or no in dB but it gives readings from a maximum +22.9 to a minimum of -119 dB ?... The RE brand is a little obscure but there are places which sell it, like this http://www.recycledgoods.com/products/RE-107-Radiometer-Synthesized-Signal-Generator.html
The Test
The test consisted in a 15,600 Khz signal with 10% of modulation of 400 Hz injected directly into the terminal antenna and lowering the signal until my ears can not hear it anymore, in cases where I got weird readings I retested it 1,2,3 times until the readings were consistent. There are some models which I have various samples and I tested all of them to get a better idea of their performance. All of my radios are calibrated to their maximum possible; some have mods to enhance its sensitivity, I added some comments next to the model. The number in the performance column is a negative number as read from the SG, it´s the minimal signal strength detected by the radio and my ears, so the radio that could detect the minimum signal is the most sensitive one and the performance table is ordered to reflect that.
THE RESULTS
|
Brand
|
Model
|
Notes
|
Picture Link
|
Performance
|
|
Sony
|
CRF5100
|
Earth Orbiter
|
CRF-5100
|
-118
|
|
Magnavox
|
90AL999/44
|
aka Philips AL990
|
AL-990
|
-116
|
|
Realistic
|
12-759A
|
Patrolman 9
|
Patrolman 9
|
-111
|
|
CCRadioSW
|
CCRadiosw
|
aka Redsun RP2100
|
CCRadioSw
|
-110
|
|
Panasonic
|
RF2200
|
Sample 3
|
RF-2200
|
-108
|
|
Sony
|
ICF5900
|
Sample 1
|
ICF-5900
|
-108
|
|
Sony
|
ICF5900
|
Sample 2
|
ICF-5900
|
-108
|
|
Sony
|
ICF5900
|
Sample 3
|
ICF-5900
|
-108
|
|
General Electric
|
7-2990
|
Made by Panasonic
|
GE 7-2990
|
-107
|
|
Panasonic
|
RF2900
|
Modded
|
RF-2900
|
-106
|
|
Sony
|
TFM8000W
|
Super Sensitive
|
TFM-8000
|
-106
|
|
Panasonic
|
RF1260
|
|
RF-1260
|
-105
|
|
Eton by Grundig
|
S350DL
|
aka Tecsun BCL3000
|
S350DL
|
-103
|
|
Panasonic
|
RF2200
|
Sample 2
|
RF-2200
|
-103
|
|
Zenith
|
D7000Y
|
Transoceanic
|
D7000Y
|
-103
|
|
Panasonic
|
RF1180B
|
Australian Model
|
RF-1180
|
-100
|
|
Panasonic
|
RF2900
|
Stock
|
RF-2900
|
-98
|
|
Panasonic
|
RF2800
|
Modded
|
RF-2800
|
-98
|
|
Panasonic
|
RF2600
|
Modded
|
RF-2600
|
-98
|
|
Panasonic
|
RF1150
|
|
RF-1150
|
-97
|
|
Panasonic
|
RF2200
|
Sample 1, broken ?
|
RF-2200
|
-94
|
|
Grundig
|
1400SL
|
Could it be broken ?
|
Grundig 1400SL
|
-72
|
Commenting the results
Although the signal was injected directly to the terminal antenna the results are consistent with their performance in the real world, also the frequency was a difficult one had I chosen a lower one all the radios would have performed like super radios, regular shortwave transmission occur at lower freqs like from 6 to 12 khz and are mostly heard in the evenings and nights, those from around 15600 khz and above are heard at midday.
From the result we have some surprises and some deceptions, in the former group we have:
The Realistic Patrolman 9 (not all Realistic radios are bad eh?), the Panasonic RF-1260 (Cheap radio)
And in deception group we have:
Grundig 1400SL (I really like this radio, could it be broken? It has a great sound! ), Panasonic RF-2800 (I did a RF mod to this radio and it´s very sensitive but in frequencies below 12 Khz, I suspect I have a Miller capacitance problem here).
Some guy made a comparison between the transoceanic D7000Y and the Sony CRF-5100 and his conclusion were that his Transoceanic was the best and I was so excited that I bought one too but although my sample is good, it´s no better than my Sony despite of having changed all transistor with newer one seeking to improve RF performance which Ithink I have achieved but still it´s not in the same league as the Sony. Perhaps the sample of this guy it´s no good ? If you have both please comment about this.
Conclusion
Now that you see what a boring day can do, it´s time to enjoy the radios and forget the tests until I get more radios to update this table. Please comment about this work I really like to hear some input from you.
ALI (Huesby)
Sorry about my English but it´s the best I can do.
I've gone ahead and picked one of these Insignia HD radios up. I had a Best Buy gift card to use, so I figured why not. I already had the smaller Insignia HD radio, and wasn't all the impressed with it. I think the antenna being the headphone wire made for iffy reception. (I live on the outskirts of Minneapolis/St Paul.) The controls were a little awkward as well. Keeping it charged was inconvenient as well. But I really wanted to get some HD programming, so...
So I've only had the bigger model for a few hours, and haven't played with it much. I'm not as much into the technical specifics of radios as most of you are, so I can't give a great technical review.
Using it on 4xAA batteries and the whip antenna, I get pretty much all the same stations I do on any other radio I have in the house. For those broadcasting multiple HD channels per frequency, I seem to get a fair number of those as well. (I need to check it against a known list of HD broadcasts for my area).
It shows the program information in the small display window, and it scrolls (somewhat annoyingly) horizontally.
The controls are basic. There's a Seek +/-, Tune +/-, Memory Set, Memory Recall, On/Off, Volume +/-, and Source (there's an AUX input). Not the most user-friendly control set particularly if you're hunting around. I much prefer analog controls, or at least some speedier tuning capability. Once the presets are set, I think it will be livable. The buttons do all feel somewhat flimsy to me, but no more so than pretty much any radio made these days.
The radio seems slow to start producing sound once you've tuned to a station. This seems to be related to signal strength, and how much HD channel information it's trying to pull down.
Speaker sounds reasonable for it's size.
The unit is oriented to sit upright even thought it's screaming to lay flat. With the antenna extended it seems a little top heavy. Overall the unit feels pretty solid (other than the somewhat flimsy-feeling controls). In the box was an AC Adapter, a short wire plug-in antenna, and user guide. It also runs on 4AA batteries. I'm guessing given the heavy processing this thing probably does for the HD signal, that battery life may be underwhelming. But it's too soon to know that yet.
As a "birthday" gift (via the gift card) I really have no complaints. And thanks to this blog, I found out it existed (otherwise I'd kind of given up on HD radio since I procrastinated on buying that Sony unit that was discontinued).
For my listening needs it's going to be fun having the HD option in the house, and so far so good.