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#1
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Looking for newer SW receiver with digital tuning
My recommendation is to look for an Icom R71A or Kenwood R5000. These
receivers are high end table top units. They were the top models in the 1980's and can easily out perform any of the portables currently produced. These units have excellent crystal filtering, and can take optional narrow filters. They both have passband tuning and CW notch filters, and are stable enough to listen to AM stations in ssb mode (exalted carrier AM reception). In SSB mode you can listen to either the upper or lower sideband of an AM signal, whichever has the least amount of interference, and make use of the narrow ssb filters and passband tuning to really dig out those weak stations. The IcomR71A and Kenwood R5000 are very reasonably priced, and have excellent crystal filters with several optional filters that can still be found. I've seen R71A's with all the optional filters go for around $300.00, and units with the stock filters for $200.00. The Kenwood R5000's go for a bit more. The build quality of these units far exceed the plastic radios being produced now a days. |
#2
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Looking for newer SW receiver with digital tuning
DonL wrote:
The IcomR71A and Kenwood R5000 are very reasonably priced, and have excellent crystal filters with several optional filters that can still be found. I've seen R71A's with all the optional filters go for around $300.00, and units with the stock filters for $200.00. The Kenwood R5000's go for a bit more. The build quality of these units far exceed the plastic radios being produced now a days. There are two problems with these radios. Both are excelent choices if you are aware of the problems and buy a radio which has had them fixed or you consider the cost of the repair/upgrade when you buy it. The R71 and R71a had their internal programing in battery backed up RAM. Eventually the battery died and the radio became unusable. There were ROM upgrade kits (where the RAM was replaced with a permanent ROM chip) and ICOM did some sort of repair (replace battery and reprogram the RAM). It's well worth your time to investigate one and see. Here is a web page I found searching the web for "ICOM R71 battery backed up RAM" http://ronhashiro.htohananet.com/am-...-ramboard.html The Kenwood R5000 is a different matter. The R5000 was made with certain components "potted" with a rubber compound. This rubber compound eventually absorbed enough water from the air to cause the radio to stop working and eventually corrode the components it protected. This know as the "dots" because the display shows a dot instead of each digit. The R5000 has a RECHARGEABLE lithium battery for memory back up. It cannot be replaced with a regular lithium battery and the front cover of the radio must be removed to access it. All together the removal of the potting compound, replacing and damaged components and replacing the battery costs around $150 plus shipping. As an estimate an R5000 that has its original battery and has not been "fixed" is worth around $250-$350 depending upon filters and accessories. In any case the VHF converter is worth an additional $200 on it's own. A repaired unit is worth around $450 on up depending upon filters, accesories and the condition. Note that the computer interface is two parts one an add-on inside the radio and an external ttl to RS232 level convertor. It is very limited in what it can do. The R5000 takes the same solder in SSB and CW filters as the TS-430, TS-440 and TS-450, so they are fairly common. Some of them took the same AM filter, but the R5000 version came on a circuit board while the ham version was soldered in. The radio includes a useable 6kHz AM filter and a 2.4kHz SSB/CW filter. A better 6kHz AM filter was available and IRC sold a 4kHz AM filter. You could also buy a 1.8kHz SSB filter, and 500Hz and 250Hz CW filters. There are some limits on the number of filters, placement and combinations. There is an R5000 Yahoo group, which is a good place to ask questions. Geoff. -- Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM |
#3
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I purchased an ICOM R-75 after using an Eton EXM1. It would suit your needs much better because it has many features, including not overloading with your longwire. Mine is used for all SW monitoring. They are great receivers. Go to eham.net for the reviews. Hope this helps. It is also a triple conversion which reduces overlaoding and images. Best, KE5LDO
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Extra Class Volunteer Examiner ARRL Instructor |
#4
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Looking for newer SW receiver with digital tuning
KE5LDO wrote:
I purchased an ICOM R-75 after using an Eton EXM1. It would suit your needs much better because it has many features, including not overloading with your longwire. Mine is used for all SW monitoring. They are great receivers. Go to eham.net for the reviews. Hope this helps. It is also a triple conversion which reduces overlaoding and images. Best, KE5LDO I'm with LDO on this. the icom is a sweet receiver. Universal has 4 on their used list right now. Drifter... |
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