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DL4YHF@aol.com wrote:
<blockquote TYPE=CITE><font face="arial,helvetica"><font size=-1>Hello,</font></font>
<p><font face="arial,helvetica"><font size=-1>I once had the chance to
compare an old IC735, an IC706 and a TS850 running</font></font>
<br><font face="arial,helvetica"><font size=-1>side-by-side connected to
a tuned LF-antenna (150m long wire).</font></font>
<p><font face="arial,helvetica"><font size=-1>Results:</font></font>
<br><font face="arial,helvetica"><font size=-1>- TS850 with 500Hz and 270
Hz filter:</font></font>
<br><font face="arial,helvetica"><font size=-1> Could hear the grass
grow and OH1TN call cq on 136kHz.</font></font>
<br><font face="arial,helvetica"><font size=-1> A fine rig, as already
expressed by others (and in the LF handbook).</font></font>
<br><font face="arial,helvetica"><font size=-1> Considering the price
I once paid for it, and for what it can be found</font></font>
<br><font face="arial,helvetica"><font size=-1> nowadays on the second-hand
market, I would almost buy a second</font></font>
<br><font face="arial,helvetica"><font size=-1> one as a spare unit
!</font></font>
<p><font face="arial,helvetica"><font size=-1>- IC735: quite deaf,
some IM products audible which were not there</font></font>
<br><font face="arial,helvetica"><font size=-1> on the TS850. But
still a nice rig on 160m and HF.</font></font>
<p><font face="arial,helvetica"><font size=-1>- IC706 ( the 'old' one,
no MK2, with 270 Hz filter):</font></font>
<br><font face="arial,helvetica"><font size=-1> Very deaf on 136kHz,
no matter if the preamp is on or off.</font></font>
<br><font face="arial,helvetica"><font size=-1> Turning the VFO knob
OR THE VOLUME CONTROL results</font></font>
<br><font face="arial,helvetica"><font size=-1> in a hissing sound,
which stops after the motion.</font></font>
<br><font face="arial,helvetica"><font size=-1> Looks like the rig
picks up some noise from its own serial interface</font></font>
<br><font face="arial,helvetica"><font size=-1> between the front
panel and the microcontroller !</font></font>
<br><font face="arial,helvetica"><font size=-1> Hopefully the IC706
MK2 ( & -G) are better at 136kHz.</font></font>
<br><font face="arial,helvetica"><font size=-1> At 77kHz, I cannot
even hear the DCF time signal transmitter near</font></font>
<br><font face="arial,helvetica"><font size=-1> Frankfurt...</font></font>
<p><font face="arial,helvetica"><font size=-1>Some years ago, I compared
the TS570 and the TS850 on HF for CW.</font></font>
<br><font face="arial,helvetica"><font size=-1>There were severe blocking
effects in the TS570 in a heavy crowded CW</font></font>
<br><font face="arial,helvetica"><font size=-1>segment, because there is
not enough selectivity in the early stages</font></font>
<br><font face="arial,helvetica"><font size=-1>in the IF amplifier chain.
The S-meter went up to S-9, but no signal</font></font>
<br><font face="arial,helvetica"><font size=-1>could be heard because the
DSP decided it was outside the passband.</font></font>
<br><font face="arial,helvetica"><font size=-1>And, with modestly narrow
CW filter settings the audio from the TS570</font></font>
<br><font face="arial,helvetica"><font size=-1>sounded like a block flute,
which is not very pleasant. Maybe there was</font></font>
<br><font face="arial,helvetica"><font size=-1>something wrong with the
DSP. We never did further investigations because the</font></font>
<br><font face="arial,helvetica"><font size=-1>owner of the TS570 immediately
traded it for a TS850...</font></font>
<p><font face="arial,helvetica"><font size=-1>73,</font></font>
<br><font face="arial,helvetica"><font size=-1> Wolf DL4YHF.</font></font></blockquote>
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