[Kenwood] Tuner and power output

[Mike Baker]

Hello John,
	I have a TS-2000 that is almost 2 years old and decided to check mine after
reading your post.  I always noticed that the power out was slightly less
with the internal tuner inline but never measured it band by band. Here are
my results.
You will notice that on 17meters the tuner actually makes a big increase in
power out! Reverse of what was happening on all the other bands.
Interesting. Below are my readings on two different meters in series into a
dummy load shown as notuner/tuner.


Band	Freq		MFJ meter	NCG meter
10	28.050	90/84		100/87
12	24.940	92/86		100/90
15	21.060	88/84		97/88
17*	18.147	60/85 ?	50/85 ?
20	14.060	90/87		95/90
30	10.110	97/87		110/90
40	7.009		99/92		102/90
80	3.556		102/94	105/95
160	1.836		100/92	104/89

I asked Gary Judd the store manager of HRO Phoenix if he had reports of this
nature about the TS-2000 and he confirmed our findings as the one he owned
about two+ years ago did the same thing.  It doesn't appear to be a concern
and is considered normal for this rig. He could make no accounting for my 17
meter findings but I would make a guess that the tuner is making a better
match to the antenna than the last filter stage in the amp is doing, perhaps
it is the same filter as the 20 meter band and rolls off that much by the
time you get to 18.1 Mhz.  Don't know for sure as I haven't checked the
schematic.

On a side note, I love this rig.  Best $14XX I ever spent. Lots of radio in
one package with equal performance on VHF/UHF as well as HF.  I get
excellent audio reports on SSB and find the QSK to be quite nice for
contesting / DX'ing. Much less clunky than the QSK in the IC-706MKIIG that I
had before. Nice to have the DSP for VHF weak signal work as well as be able
to connect transverters with ease.  Now that I have been bitten by the QRP
bug, it cranks down to 5 watts output with ease and gives me a much better
receiver than most of the other QRP rigs. My only regret is that I didn't
buy the "X" model with the 1.2Ghz module in it.



Mike Baker  K7DD
k7ddmjb at qwest.net



-----Original Message-----
From: kenwood-bounces at mailman.qth.net
[mailto:kenwood-bounces at mailman.qth.net]On Behalf Of John Geiger
Sent: Friday, March 04, 2005 7:53 AM
To: adjust_ts2000 at yahoogroups.com; kenwood at mailman.qth.net;
kenwoodts2000 at yahoogroups.com; kenwoodrdio at yahoogroups.com
Subject: [Kenwood] Tuner and power output


I recently purchased a used Kenwood TS2000 (delivered
Monday) from a ham dealer that does have a 90 day
warranty on used equipment.  It is the second TS2000 I
have owned.  Using both a dummy load and antennas, the
rig is putting out 100 watts, as measured by an
external wattmeter (using FSK or FM to produce a
carrier).  However, when I put the internal tuner in
line, the power drops on some bands-to maybe 80 watts
or so.  I didn't have an external meter when I owned
my previous TS2000 so I can't comment on what happed
with that one.  And I have had a couple of other
radios with internal tuners (Icom 756 and Icom 746)
and never noticed the power lowering with the tuner at
all.

So is this normal for the TS2000, or may there be
something going bad in the tuner?  If it is a tuner
problem-any ideas as to what is going wrong?  If it is
bad, I want to get it fixed before the warranty
expires.
73s John NE0P





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