Another year has brought many new additions to the AM Mega Shootout List. A question I am frequently asked is, What is the best AM portable radio Its a complex. Back to main Last modified 20171007 All documents are in english unless otherwise stated. Model Documents Icom. Dota Map 6.43 B Download. Бесплатные объявления о продаже радиоприемников Р160, Р250, Р309, Р311, Р329, AR, AOR, Drake, Tecsun и. Mit dem S2000 bietet der chinesische Hersteller TECSUN einen nicht nur optisch groen Weltempfnger an. Sein Gehuse spielt an die legendren GRUNDIG Satellit. Earlier this year one of my readers in Australia noted the addition of the Digitech AR1780 to the product offerings of the Australia and New Zealandbased retailer. Shnte levnou, pouitou, radiostanici Zkuste se t podvat na http a httpwww. AM Portables Mega Shootout 2. UpdateClick For Panaromic View Of The Radio Closet. Another year has brought many new additions to the AM Mega Shootout List. A question I am frequently asked is, What is the best AM portable radioIts a complex issueconsiderably more complex than listing radios in order of Best to Worst. Radios have strengths and weaknesses, so one radio might be best in one situation and another might be best in another. So while I will assign these radios to groups, the Capsule Reviews following the lists will describe the radios personalities, along with their  strengths and weaknesses to help you make a more informed choice. Remember, in this article I am rating these radios based first on their AM performanceI will note when a radio has other attributes or weaknesses such as excellent FM or SW and will also describe sound quality when appropriate. You can always email me to ask specific questionsI try to answer every email I receive. However please read the full reviews when available before emailing me as I receive many emails with questions which are clearly addressed in those reviews. First a few notes about my testing methodology Comparing portable radios is tricky many such tests Ive seen are fatally flawed because the tester failed to take some of the variables and pitfalls which must be controlled into consideration. Some of these include Unit To Unit Variability No two samples of a given model perform absolutely identically as received, especially vintage sets. Usually I completely rehabilitate the old radios I acquire, doing any repairs as needed to restore full, normal operation followed by a careful alignment to ensure the unit is operating at peak efficiency. I have been lucky enough to be able to examine multiple samples of many of the top models and have found that even after I have done everything possible some variations may still exist. T1oAltXfFXXXatf8U8_101507.jpg' alt='Tecsun Pl 450 Manual' title='Tecsun Pl 450 Manual' />When that happens I use a good, typical sample for these testsan unusual sample either good or bad is obviously not the best candidate to judge a model in general. This seems to be the most reliable way to judge each radios inherent capabilities. This unit to unit variability is also a problem with many current models. Far Left Zenith Royal 5. Series Channel Masters. Near Left A Mix with Several Zeniths, RCAs Misc. How To Test AM Sensitivity Although many factors affect reception and overall usability of a radio, sensitivity is without a doubt one of the most important variables in a portable AM set. A few receiver reviews. From its humble beginnings back in 2004, when I started publishing short evaluations of the shortwave receivers that were crossing my way. El Tecsun PL380 cubre onda larga, onda media, onda corta de 2. MHz y FM, incluyendo estreo FM a la toma de auriculares. Esta radio inteligente cuenta con. Sold Item Sold Page Acoustic Energy WiFi WiFi Internet radio Sold Page 621 AEA CP100 Computer Interface Sold Page 592 AEA MBARO RTTY Reader Sold Page 234. Hot-Sale-Tecsun-PL-450-FM-LW-MW-Shortwave-Dual-Conversion-Radio-Receiver-Digital-DLL-TECSUN.jpg' alt='Tecsun Pl 450 Manual' title='Tecsun Pl 450 Manual' />Nevertheless it is amazing to me how few people seem to understand this relatively simple concept. The most reliable way to perform AM sensitivity tests is in the daytime when signals are weakest and most stable. It is also necessary to test radios in a very low noise environmentwhere Radio Frequency Interference RFI is not the limiting factor in reception. In a low noise location the radios own noise floor will determine how clearly a weak signal is received. Noise is generated in the radios own circuits and is heard as hiss behind the signala sensitive radioone with a low noise floor, can make some signals sound more like strong locals while they seem more distant and hissy on other radios. The problem is that in todays homes there are many noise sources, such as TVs, high tech light bulbs, wired smoke detectors, computers, modems, garage door openers, cable boxes and some wall wart  AC power supplieschargers to name just a few. Williams Pinball Hall Of Fame Pc there. Tecsun Pl 450 Manual' title='Tecsun Pl 450 Manual' />Портал радиолюбителя СХЕМА. Карта сайта. Афера Томаса Крауна Всемирный День qrp. Such noise is heard as a buzz  or static which can obliterate weaker and in severe cases even strong signals. In such conditions you cannot determine the true noise floor of the radiothe interference becomes the limiting factor in your AM reception, masking the differences in various radios. See my article Combatting AM SW Interference at the top of the Home Page for tips on how to deal with noise and improve your listening experience. Can Unlimited Edition Blogspot here. Another major point When comparing radios it is important to use as many frequencies as possible because I often find that a particular radio may do unusually well or poorly on one or two stationsusing only a few frequencies can yield very misleading results. Tedious though it is, the more signals checked, the clearer the picture becomes so I log and tabulate the results. Quieting Curve Although Quieting Curves have long been specified with regards to FM tuners this term is almost unheard of in AM radio tests, yet differences in this quality can make a huge difference to the program listener, especially daytime listening. Two radios may receive very faint signals similarly, but as the signal strength increases, one radio may achieve a better signal to noise ratio less circuit hiss far sooner than the other. This radio will generally be more pleasant to listen to because most signals you would actually be able to listen to will be less noisy on it. Yet the two might be considered by some to have equal sensitivity. This is one area in which I find many AM radio comparisons to be lacking. While so called hard core DXers value a radios ability to pick faint traces of audio out of the mud, most program listeners listen to somewhat stronger signals, and for these stations, a radio with a better quieting curve will sound much nicer than another which is hissier on such signals. To test for this I use many different signals of varying strengths, up and down the dial and note how the radios compareafter a while clear trends emerge. It is also more difficult to judge sensitivity at night when AM signals tend to be stronger. At night other factors may be just as important, such as Selectivity Selectivity is the ability of a radio to separate signals that are close to each other on the dial. Most better radios will separate adjacent signals, say 6. KHz with no problem unless the desired signal is much weaker than the interfering signal. Since the ferrite rod antennas used in almost all portable AM radios are directional this can be aided by careful aiming if the signals are arriving from different directions. One of the big advances made possible by Digital Signal Processing DSP is the inclusion of up to 5 bandwidths even in inexpensive AM radiosthis was impossible just a few years ago. You use wider bandwidths when there is no interference for best clarity or crispness, and use narrower bandwidths when you need to block out an interfering signal right next to the one you want to listen to. OverloadRF Dynamic Range While good weak signal sensitivity is desirable, another important factor is immunity to strong signal overload. If you live near an AM transmitter site you may find that a strong local signal spreads out on the dial wider than it normally would, or even pops up at other points on the dial, covering up stations you should otherwise be able to receive. If you live in a metropolitan area with many strong signals, a radio which is susceptible to overload will not be fun to use. Multiple mega strength signals can mix and splatter spurious images all over the dial. Another form of overload is called desensitizationa loss of sensitivity to weak signals in the presence of stronger ones even if they are not immediately adjacent on the dial. My suburban testing location does not reveal much about overload performance, however I do regularly travel to strong signal locations to see how various radios perform there and I will note this in the comments.