[TenTec] Model 238 Tuner?
Beamer, Jay
JBeamer@PanAmSat.com
Fri, 22 Jan 1999 18:12:53 -0500
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Hello Duane,
I have a 238 and also the Autek WM-1 that I use with an Omni V. I used to
run a Henry 2K-4, but now I run a Herc II. The 238 had no problem with the
output of the Henry, which did legal limit, even though I seldom ever
operated at that level of output. That's why I got the Herc II. Although I
really, really like the Autek, the meter in the 238 is very functional and
works exactly as it was designed and I like to see what's going on at the
antenna tuner, so I look at them both. I think the Autek is more accurate,
especially since I calibrated it to a Bird, but it's all relative anyway.
The only feature I dislike is the analog scale and dial cord arrangement
used as a turns counter. Over the past three years, I've had to take the 238
apart two times because the dial cord jumped off one of the little
wheels/guides. The last time I took it apart and put it back together, I
decided I wasn't gonna crank on the roller inductor like a maniac and it's
been fine for the last 8 months.
As for the accuracy of repeating the setting for the roller inductor, I've
also used tuners with actual turns counter, and yes they're a bit more
accurate, but even with a tuner that utilizes an actual turns counter, you
can't depend on repeating settings exactly anyway, at least I wouldn't.
Would you pump you're Centurion at full tilt boogie into any antenna tuner/
antenna combo without first checking it at low power and touching up the
tuner settings? The settings are going to be a little different every time
you use a tuner, maybe due to humidity, rain, etc. I've found my roller
inductor on the 238 to be within 1/2 turn every time I tune between 40 and
75.
Mine works well. Plus it looks good.
73,
Jay/KM6VX
> -----Original Message-----
> From: dacalvin@us.ibm.com [SMTP:dacalvin@us.ibm.com]
> Sent: Friday, January 22, 1999 2:41 PM
> To: tentec@contesting.com
> Subject: [TenTec] Model 238 Tuner?
>
>
> I'm considering the purchase of the 238 tuner. I have an Omni VI+ and a
> Centurion amp. While the amp does an excellent job of matching the
> variety
> of loads I present it with, I'd like to do a better job of matching the
> load to the amp, and also to allow barefoot full-power use in addition.
> I'm sure there are lots of them in use - what do the owners think? Is
> this
> a good tuner? How repeatable are the settings (I read the recent thread
> on
> this topic, but I'm not sure if it was settled that this particular tuner
> had a dial string slip problem or not.) Also, how useful is the power/SWR
> meter? I have a nice Autek WM-1 peak reading and calculating SWR meter
> that I really like - does the 238's meter function work as well?
>
> Thanks in advance.
>
> 73, Duane AC5AA
>
> Duane A. Calvin
> Server Systems Test Engineer
> Dept. 76TS RS/6000 - SP Nodes
> IBM Austin, TX >O< Tie: 793-3368
>
>
>
> --
> FAQ on WWW: http://www.contesting.com/tentecfaq.htm
> Submissions: tentec@contesting.com
> Administrative requests: tentec-REQUEST@contesting.com
> Problems: owner-tentec@contesting.com
> Search: http://www.contesting.com/km9p/search.htm
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<TITLE>RE: [TenTec] Model 238 Tuner?</TITLE>
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<BODY>
<P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">Hello Duane,</FONT>
</P>
<P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">I have a 238 and =
also the Autek WM-1 that I use with an Omni V. I used to run a Henry =
2K-4, but now I run a Herc II. The 238 had no problem with the =
output of the Henry, which did legal limit, even though I seldom ever =
operated at that level of output. That's why I got the Herc II. =
Although I really, really like the Autek, the meter in the 238 is very =
functional and works exactly as it was designed and I like to see =
what's going on at the antenna tuner, so I look at them both. I think =
the Autek is more accurate, especially since I calibrated it to a Bird, =
but it's all relative anyway.</FONT></P>
<P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">The only feature I =
dislike is the analog scale and dial cord arrangement used as a turns =
counter. Over the past three years, I've had to take the 238 apart two =
times because the dial cord jumped off one of the little wheels/guides. =
The last time I took it apart and put it back together, I decided I =
wasn't gonna crank on the roller inductor like a maniac and it's been =
fine for the last 8 months.</FONT></P>
<P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">As for the accuracy =
of repeating the setting for the roller inductor, I've also used tuners =
with actual turns counter, and yes they're a bit more accurate, =
but even with a tuner that utilizes an actual turns counter, you can't =
depend on repeating settings exactly anyway, at least I wouldn't. Would =
you pump you're Centurion at full tilt boogie into any antenna tuner/ =
antenna combo without first checking it at low power and touching up =
the tuner settings? The settings are going to be a little different =
every time you use a tuner, maybe due to humidity, rain, etc. I've =
found my roller inductor on the 238 to be within 1/2 turn every time I =
tune between 40 and 75.</FONT></P>
<P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">Mine works well. =
Plus it looks good.</FONT>
</P>
<P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">73,</FONT>
</P>
<P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">Jay/KM6VX</FONT>
</P>
<UL>
<P><FONT SIZE=3D1 FACE=3D"Arial">-----Original Message-----</FONT>
<BR><B><FONT SIZE=3D1 FACE=3D"Arial">From: </FONT></B> <FONT =
SIZE=3D1 FACE=3D"Arial">dacalvin@us.ibm.com =
[SMTP:dacalvin@us.ibm.com]</FONT>
<BR><B><FONT SIZE=3D1 FACE=3D"Arial">Sent: </FONT></B> <FONT =
SIZE=3D1 FACE=3D"Arial">Friday, January 22, 1999 2:41 PM</FONT>
<BR><B><FONT SIZE=3D1 =
FACE=3D"Arial">To: </FONT></B> <FONT SIZE=3D1 =
FACE=3D"Arial">tentec@contesting.com</FONT>
<BR><B><FONT SIZE=3D1 =
FACE=3D"Arial">Subject: </FONT>=
</B> <FONT SIZE=3D1 FACE=3D"Arial">[TenTec] Model 238 Tuner?</FONT>
</P>
<BR>
<P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">I'm considering the =
purchase of the 238 tuner. I have an Omni VI+ and a</FONT>
<BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">Centurion =
amp. While the amp does an excellent job of matching the =
variety</FONT>
<BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">of loads I present =
it with, I'd like to do a better job of matching the</FONT>
<BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">load to the amp, =
and also to allow barefoot full-power use in addition.</FONT>
<BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">I'm sure there are =
lots of them in use - what do the owners think? Is this</FONT>
<BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">a good tuner? =
How repeatable are the settings (I read the recent thread on</FONT>
<BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">this topic, but I'm =
not sure if it was settled that this particular tuner</FONT>
<BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">had a dial string =
slip problem or not.) Also, how useful is the power/SWR</FONT>
<BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">meter? I have =
a nice Autek WM-1 peak reading and calculating SWR meter</FONT>
<BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">that I really like =
- does the 238's meter function work as well?</FONT>
</P>
<P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">Thanks in =
advance.</FONT>
</P>
<P><FONT COLOR=3D"#000000" SIZE=3D2 =
FACE=3D"Arial"> 73, Duane =
AC5AA</FONT>
</P>
<P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">Duane A. =
Calvin</FONT>
<BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">Server Systems Test =
Engineer</FONT>
<BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">Dept. =
76TS RS/6000 - SP Nodes</FONT>
<BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">IBM Austin, =
TX >O< Tie: =
793-3368</FONT>
</P>
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