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#1
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Horrible, Horrible HF reception
I recently bought an Icom IC-R3 (hand held communications receiver) and a
Yaesu VX-7R handy-talky (can tune .5 to 1000 Mhz). Both of these devices can't pick up a single shortwave signal. And this is on a long wire antenna, not the rubber duckies. (They both receive great on VHF/UHF. The IC-R3 even manages to pick up fringe TV channels.) The same antenna connected to my old Kenwood 599 receiver brings in plenty of HF signals, both shortwave broadcast and amateur. How can these two new receivers be soooo bad????? I live within a mile of an AM broadcast station, could that be the problem? (It doesn't bother my old Kenwood though!) Is anyone successfully listening to shortwave stations with either of these radios? I'm was going to buy a new HF amateur rig, but now I'm scared that it might have poor reception at my location also. -- Bob D. ND9B |
#2
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Horrible, Horrible HF reception
Try 3.215 mhz ( WWCR )
"WWCR has four 100 Kw state-of-the-art transmitters which serve the world on 10 different broadcasting channels. Together our transmitters provide over 400 religious and talk programs direct from Nashville, Tennessee, USA, to a global audience." You 'should' be able to pick up this station on almost anything, if not, you may be in a 'dead spot' We've all noticed certain area's while in a car ( listening to a radio) where reception seems to fade to almost nothing, and a few blocks away its back to normal Also you might want to re-check your antenna, make sure its not broken or touching a ground I have an R3 and using a telescopic 'whip', can pick up stronger SW signals even inside. "Bob D." wrote in message m... I recently bought an Icom IC-R3 (hand held communications receiver) and a Yaesu VX-7R handy-talky (can tune .5 to 1000 Mhz). Both of these devices can't pick up a single shortwave signal. And this is on a long wire antenna, not the rubber duckies. (They both receive great on VHF/UHF. The IC-R3 even manages to pick up fringe TV channels.) The same antenna connected to my old Kenwood 599 receiver brings in plenty of HF signals, both shortwave broadcast and amateur. How can these two new receivers be soooo bad????? I live within a mile of an AM broadcast station, could that be the problem? (It doesn't bother my old Kenwood though!) Is anyone successfully listening to shortwave stations with either of these radios? I'm was going to buy a new HF amateur rig, but now I'm scared that it might have poor reception at my location also. -- Bob D. ND9B |
#3
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Horrible, Horrible HF reception
"labtech_one" wrote in message ... Try 3.215 mhz ( WWCR ) "WWCR has four 100 Kw state-of-the-art transmitters which serve the world on 10 different broadcasting channels. Together our transmitters provide over 400 religious and talk programs direct from Nashville, Tennessee, USA, to a global audience." You 'should' be able to pick up this station on almost anything, if not, you may be in a 'dead spot' We've all noticed certain area's while in a car ( listening to a radio) where reception seems to fade to almost nothing, and a few blocks away its back to normal Also you might want to re-check your antenna, make sure its not broken or touching a ground I have an R3 and using a telescopic 'whip', can pick up stronger SW signals even inside. The R2 and the Yaesu version suffer greatly from overload and desense when used with a longwire. Like you, I've had pretty good luck with a collapsible whip (I used a 19" 2m quarter wave whip on mine with pretty good results.) |
#4
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Horrible, Horrible HF reception
On 16 abr, 04:27, "Bob D." wrote:
I recently bought an Icom IC-R3 (hand held communications receiver) and a Yaesu VX-7R handy-talky (can tune .5 to 1000 Mhz). Both of these devices can't pick up a single shortwave signal. And this is on a long wire antenna, not the rubber duckies. (They both receive great on VHF/UHF. The IC-R3 even manages to pick up fringe TV channels.) The same antenna connected to my old Kenwood 599 receiver brings in plenty of HF signals, both shortwave broadcast and amateur. How can these two new receivers be soooo bad????? I live within a mile of an AM broadcast station, could that be the problem? (It doesn't bother my old Kenwood though!) Is anyone successfully listening to shortwave stations with either of these radios? I'm was going to buy a new HF amateur rig, but now I'm scared that it might have poor reception at my location also. -- Bob D. ND9B Hello Bob, This is a common problem with hand held wide band receivers. These receivers cannot handle large signals and picking out the small signal you want to hear. It is not Kenwood R5000, Drake or JRC. I have the same problem with an AOR8200 MKII. There are several solutions. When the interference comes from a single nearby transmitter, you may build a "notch filter" for that single frequency. Such a filter may consist of a series resonant circuit parallel to the antenna input. It is very likely that the overload is caused by many stations together. In that case you may build a tunable preselector (some inductors with an [old] plate variable capacitor). I have that in combination with my AOR8200. The result can be amazing (from hearing a station not all to clear reception after insertion of the preselector). The disadvantage is that you have to tune the preselector each time you change your frequency with more then some percent. For the time being, you may use the smallest possible antenna that still gives reasonable reception and you may use the attenuator function (if present). If you are not in electronics, try to get some help from a radio amateur. I use this type of preselector, the zig zag lines are non-coupled inductors with a tap on it, C = the tunable capacitor. View with fixed sized font setting (for example Courier). ---------------------- / | \ \ | / / | \ \ --- c / / --- \ \ | / inp----- | --------output / | \ \ | / gnd----------------------------------- gnd Best Regards Wim PA3DJS |
#5
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Horrible, Horrible HF reception
If you are not in electronics, try to get some help from a radio amateur. Best Regards Wim PA3DJS He is a radio amateur, and he even holds an Extra class license. |
#6
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Horrible, Horrible HF reception
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#7
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Horrible, Horrible HF reception
"Bob D." schreef in bericht m... I recently bought an Icom IC-R3 (hand held communications receiver) and a Yaesu VX-7R handy-talky (can tune .5 to 1000 Mhz). Both of these devices can't pick up a single shortwave signal. And this is on a long wire antenna, not the rubber duckies. (They both receive great on VHF/UHF. The IC-R3 even manages to pick up fringe TV channels.) The same antenna connected to my old Kenwood 599 receiver brings in plenty of HF signals, both shortwave broadcast and amateur. All handheld "DC to daylight" recievers are useless for decent shortwave reception. If you expected them to do so, get rid of them or bring them back to the shop. MRe How can these two new receivers be soooo bad????? I live within a mile of an AM broadcast station, could that be the problem? (It doesn't bother my old Kenwood though!) Is anyone successfully listening to shortwave stations with either of these radios? I'm was going to buy a new HF amateur rig, but now I'm scared that it might have poor reception at my location also. |
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