首先声明一点,我并没有迷信什么机器,同时也对很多说法持不以为然的态度。喜欢一种机器或者
不喜欢一种机器都有他的理由,拿时髦的话来说--喜欢不需要理由。当然,大家说出些道道来
总是件令人高兴的事情。
但爱好总是爱好,我们在谈论他的时候不需要那么太认真,更不要在其中牵涉对人的评论。
下面转发的内容可能是我以前引用过的唯一的关于k2的数据。如果这位老兄没有空口说白话的话,
那就说明k2的这个接收指标确实比其他的机器要好一些(应该说好不少)。至于我为什么那么重视
这个指标,我想经常在pileup中竞争的爱好者或者是经常参加疯狂的比赛的爱好者都会明白。
同时回答楼上的问题:我买ft1000mp的时候还不知道有什么k2(孤陋寡闻),同样,ft-1000mp也是
一台很好的机器,我买了之后也没有后悔过。而且非常喜欢它的双接收功能盒它的滤波器阵列。这
同时也说明我并不是迷信k2,甚至根本就不是它的支持者。呵呵。
记得前一段时间还发过一个指标极牛的收发机的链接,但愿那不要再变成我迷信它的罪证:)
editor's note:
ed hare - w1rfi (the arrl lab manager) posted the following on the rec.radio.amateur.policy newsgroup (jan 15, 2001):
"speaking of dynamic range, the best dynamic range ever measured in the arrl lab at 5 khz spacing belongs to the elecraft k2 on 20 meters."
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subject: fw: re: minimum discernable signal
date: fri, 12 jan 2001
from: "tracy, michael, kc1sx" <mtracy@arrl.org>
here's an excerpt from a recent discussion on the 160m reflector that i thought you might be interested in. tom rauch, w8ji (of ameritron fame) had said that 20 khz numbers were not as important as numbers closer in. i had speculated that 20 khz numbers should reflect the relative performance at closer spacings, then decided to check to see if i was right.
i compiled a list of bdr and imddr figures at 5 khz, and these are listed below. also, in checking the data, i noted that the bdr for the k2 at _1 khz_ spacing was 116 db, making it a better performer than most of the other rigs were at 5 khz! (i didn't check the other rigs at 1 khz, but they are always worse as you get closer).
of course, i realize part of this stems from the single-conversion architecture, but it still has "wow" value! :)
73, michael, kc1sx
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subject: close-in dynamic range comparison: k2 vs. "big rigs"
date: fri, 12 jan 2001 14

45 -0500
from: "tracy, michael, kc1sx" <mtracy@arrl.org>
to: "'elecraft@qth.net'" <elecraft@qth.net>
hi all,
just thought you folks would like to see this too. i got involved in a discussion on receiver dynamic range on another list and one of the fellows there suggested that close-in dynamic range was perhaps more important than the arrl lab "standard" spacing of 20-khz (personally, i think you need to look at as much as possible to get the most accurate "big picture").
in response to this fellow's post, i did some research on dynamic range at 5 khz spacing for various radios that we have tested for this (only the ones we have expanded reports on). here is a copy of my findings:
i went through a number of swept dynamic range test data. here is the 5-khz data for the rigs i checked:
(in alphabetical order...)
rig bdr imd dr
elecraft k2 126 88
icom ic-706 mkii g 86 74
icom ic-756 98 67
icom ic-756 pro 104 80
icom ic-775dsp 104 77
kenwood ts-570d 87 72
ten-tec omni 6+ 119 86
yaesu ft-1000mp 119 83
yaesu ft-1000mp mark v 106 78
if anyone needs a good explanation of what these things mean, please see my recent posts to the top band list:
http://lists.contesting.com/_topband/200101/date.html 72, michael tracy, kc1sx