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#1
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How do you define the best transceiver ?
Hi,
Survey : what do you consider as an excellent transceiver from a pure technical side ? I don't need that you answer me, "the RTX that suites your need, guy". I 'd like a more technical opinion, taking in account the worst traffic conditions. If you like, can you give me your opinion, some clues, or even links developing this question (NB. I haven't got QEX that could probably help). IMHO, and very shortened, after the TX module, the RX is the most important module of un transCV (obvious). The TX module of a transCV is quite easy to build with few component and it has even not to be powerful (QRP). But the receive module is by far more complex. If a TX helps you to send your signal to the antenna, you need also an excellent RX to be able to listen to your contact whatever the conditions. Without speaking of the sensitivity (that I haven't discussed, looks obvious too), an excellent receive module should thus offer a great selectivity to remove or reduce noise and RFI and be active before the signal reaches the detection with the less amplification as possible (using filters like high/low cut, attn, rf gain, dsp slope, etc), excellent DSP filtering on IF stages, and all parameters accessible in "direct access" on the front panel instead of having to set these hundreds of values in sub-menus. Of course you pay for it, but my question is purely technique. Your answer will help me to complete an article I wrote about it, in which the selectivity has still to be developed (see later at http://www.astrosurf.com/lombry/qsl-transceiver.htm) Thanks for your comments. Thierry, ON4SKY |
#2
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"Thierry" To answer me in private use
http://www.astrosurf.com/lombry/post.htm wrote in message ... Hi, Survey : what do you consider as an excellent transceiver from a pure technical side ? I forget to say that I 'ld like an answer specifically for SSB. In CW, a narrow filter of 270 Hz of bandwidth is enough to work all pile-ups and weak stations almost lost in QRM. But in SSB, the signal is much wider with an IF passband of about 2.4 kHz at -6 dB... Thierry, ON4SKY I don't need that you answer me, "the RTX that suites your need, guy". I 'd like a more technical opinion, taking in account the worst traffic conditions. If you like, can you give me your opinion, some clues, or even links developing this question (NB. I haven't got QEX that could probably help). IMHO, and very shortened, after the TX module, the RX is the most important module of un transCV (obvious). The TX module of a transCV is quite easy to build with few component and it has even not to be powerful (QRP). But the receive module is by far more complex. If a TX helps you to send your signal to the antenna, you need also an excellent RX to be able to listen to your contact whatever the conditions. Without speaking of the sensitivity (that I haven't discussed, looks obvious too), an excellent receive module should thus offer a great selectivity to remove or reduce noise and RFI and be active before the signal reaches the detection with the less amplification as possible (using filters like high/low cut, attn, rf gain, dsp slope, etc), excellent DSP filtering on IF stages, and all parameters accessible in "direct access" on the front panel instead of having to set these hundreds of values in sub-menus. Of course you pay for it, but my question is purely technique. Your answer will help me to complete an article I wrote about it, in which the selectivity has still to be developed (see later at http://www.astrosurf.com/lombry/qsl-transceiver.htm) Thanks for your comments. Thierry, ON4SKY |
#3
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"Thierry" To answer me in private use
http://www.astrosurf.com/lombry/post.htm wrote in message ... Hi, Survey : what do you consider as an excellent transceiver from a pure technical side ? I forget to say that I 'ld like an answer specifically for SSB. In CW, a narrow filter of 270 Hz of bandwidth is enough to work all pile-ups and weak stations almost lost in QRM. But in SSB, the signal is much wider with an IF passband of about 2.4 kHz at -6 dB... Thierry, ON4SKY I don't need that you answer me, "the RTX that suites your need, guy". I 'd like a more technical opinion, taking in account the worst traffic conditions. If you like, can you give me your opinion, some clues, or even links developing this question (NB. I haven't got QEX that could probably help). IMHO, and very shortened, after the TX module, the RX is the most important module of un transCV (obvious). The TX module of a transCV is quite easy to build with few component and it has even not to be powerful (QRP). But the receive module is by far more complex. If a TX helps you to send your signal to the antenna, you need also an excellent RX to be able to listen to your contact whatever the conditions. Without speaking of the sensitivity (that I haven't discussed, looks obvious too), an excellent receive module should thus offer a great selectivity to remove or reduce noise and RFI and be active before the signal reaches the detection with the less amplification as possible (using filters like high/low cut, attn, rf gain, dsp slope, etc), excellent DSP filtering on IF stages, and all parameters accessible in "direct access" on the front panel instead of having to set these hundreds of values in sub-menus. Of course you pay for it, but my question is purely technique. Your answer will help me to complete an article I wrote about it, in which the selectivity has still to be developed (see later at http://www.astrosurf.com/lombry/qsl-transceiver.htm) Thanks for your comments. Thierry, ON4SKY |
#4
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The one that you design and build for yourself.
Only CBers buy off-the-shelf rigs which they are unable to modify or repair. "Thierry" To answer me in private use http://www.astrosurf.com/lombry/post.htm wrote in message ... Hi, Survey : what do you consider as an excellent transceiver from a pure technical side ? |
#5
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The one that you design and build for yourself.
Only CBers buy off-the-shelf rigs which they are unable to modify or repair. "Thierry" To answer me in private use http://www.astrosurf.com/lombry/post.htm wrote in message ... Hi, Survey : what do you consider as an excellent transceiver from a pure technical side ? |
#6
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"Thierry" To answer me in private use
http://www.astrosurf.com/lombry/post.htm wrote in message ... "Airy R. Bean" wrote in : Hi, Survey : what do you consider as an excellent transceiver from a pure technical side ? The one that you design and build for yourself. Only CBers buy off-the-shelf rigs which they are unable to modify or repair. GOAL!!! BACK OF THE NET!!! |
#7
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"Thierry" To answer me in private use
http://www.astrosurf.com/lombry/post.htm wrote in message ... "Airy R. Bean" wrote in : Hi, Survey : what do you consider as an excellent transceiver from a pure technical side ? The one that you design and build for yourself. Only CBers buy off-the-shelf rigs which they are unable to modify or repair. GOAL!!! BACK OF THE NET!!! |
#8
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"Airy R. Bean" wrote in message ... The one that you design and build for yourself. Only CBers buy off-the-shelf rigs which they are unable to modify or repair. Like your TS830 FT101 and RA17 GW |
#9
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"Airy R. Bean" wrote in message ... The one that you design and build for yourself. Only CBers buy off-the-shelf rigs which they are unable to modify or repair. Like your TS830 FT101 and RA17 GW |
#10
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"Graham W" wrote in news:r9m6c.1380
: "Airy R. Bean" wrote in message ... The one that you design and build for yourself. Only CBers buy off-the-shelf rigs which they are unable to modify or repair. Like your TS830 FT101 and RA17 What? You mean Gareth has commercial branded (CB) radios? Whatever next? You'd think he'd live like a Hammish - building his own house, making his old furniture, house lit by candles, wife making all of their clothes, own produce grown in the garden and driving around Wiltshire in a pony and trap. Two faced to the end..... |
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