Message-ID: <54CCFD4F.7010601@kabelmail.de>
Date: Sat, 31 Jan 2015 17:05:35 +0100
From: DK1IS <DK1IS@kabelmail.de>
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To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: LF/MF TXing for Kenwood TS950SD and TS50
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Hi Pete,

thanks for the splendid idea - obviously I did=B4nt see the wood for the=20
trees, all the more everything needed for this approach is already in=20
use here! I=B4ve a switchable devider by 10 for MF and by 100 for LF with=
=20
my marine radio exciter Hagenuk EX1001. Indeed this unit could bring out=20
the frequencies=20
directly<http://dict.leo.org/ende/index_de.html#/search=3Dtrees&searchLoc=
=3D0&resultOrder=3Dbasic&multiwordShowSingle=3Don>=20
but with a resolution of only 100 Hz. So I let it run at 13.6 MHz resp.=20
4.73 MHz. DFCW is possible too with suitable choosen F1B shifts in the=20
base bands.
So all I have to do is changing the input of the devider from the EX1001=20
to the full range TXing Kenwood sets (attenuator added ;-))! WSPR and=20
DFCW should be possible too in SSB mode with suitable AF modulation.
Thanks for the PA schematic too - it will be useful for future portable=20
activities.

Tu es 73,
Tom, DK1IS


Am 31.01.2015 um 11:35 schrieb M0FMT:
> Hi Tom
>
> Nice array of rigs I also own a TS50 plus a TS690s quite good on the RX=
 side at M/LF the TS50 lacks the RX filtering of the other rig.
>
> My suggestion is build an GW3UEP TX but drive it with reduced power  (t=
he odd milliWatt) via divider chain from one of the rigs. That way you ge=
t the frequency stability and VFO agility (not that it is really needed) =
plus side tone etc from the rig by using split working. You will have to =
recalibrate your mind to the actual TX frequency depending upon the divis=
ion quotient i.e /2 , /4 , /n etc. On RX read out would be direct of cour=
se. Otherwise use a DDS as the TX exciter. (I use xtals).
>
> http://www.gw3uep.ukfsn.org/100W_QTX/100WTX/PA_cmos.gif
>
> http://www.gw3uep.ukfsn.org/100W_QTX/QuickView/Quick%20View%20100W%20QT=
X.htm
>
> There are also similar simple TX designs for 136.
>
> This suggestion does not give you linear operation and is not suitable =
for sound card modulation applications such as WSPR (just as well IMHO) i=
t is only suitable for  On / Off  keying modes such as CW/ Very Slow CW Q=
RSS/ Opera a form of CW/ NB direct shift RTTY/ Direct shift DFCW  will wo=
rk OK.
>
> Before I am corrected WSPR is possible but only via some jiggery pokery=
 using a four direct frequency shift pattern. Clever Johan SM6LKM has cra=
cked it.
>
> However some one on here may have done the modifications to the TS rang=
e but I have not heard about it myself.
>
> Good luck
>
> 73 es GL Pete M0FMT IO91UX
>
>
> --------------------------------------------
> On Fri, 30/1/15, DK1IS <DK1IS@kabelmail.de> wrote:
>
>   Subject: LF: LF/MF TXing for Kenwood TS950SD and TS50
>   To: rsgb_lf_group@blacksheep.org
>   Date: Friday, 30 January, 2015, 16:28
>  =20
>   Hello Group,
>  =20
>   are there any experiences with extendig the TX range of
>   these Kenwood
>   radios down to MF and LF? Long time ago I=B4ve already done
>   the usual
>   extensions for general TX coverage within 1.7 to 30 MHz by
>   cutting some
>   diodes but up to now I can=B4t find any modifications for
>   MF/LF. With the
>   TS950SD it possibly could be restricted to the driver
>   output. Any ideas?
>  =20
>   Thanks and 73,
>   Tom, DK1IS
>   www.qrz.com/db/dk1is
>  =20
>
>
>
> .
>


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<html>
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    <meta content=3D"text/html; charset=3Dwindows-1252"
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  <body bgcolor=3D"#FFFFFF" text=3D"#000000">
    <div class=3D"moz-cite-prefix">Hi Pete,<br>
      <br>
      thanks for the splendid idea - obviously I did=B4nt see the wood fo=
r
      the trees, all the more everything needed for this approach is
      already in use here! I=B4ve a switchable devider by 10 for MF and b=
y
      100 for LF with my marine radio exciter Hagenuk EX1001. Indeed
      this unit could bring out the frequencies directly<a
href=3D"http://dict.leo.org/ende/index_de.html#/search=3Dtrees&amp;search=
Loc=3D0&amp;resultOrder=3Dbasic&amp;multiwordShowSingle=3Don"></a>
      but with a resolution of only 100 Hz. So I let it run at 13.6 MHz
      resp. 4.73 MHz. DFCW is possible too with suitable choosen F1B
      shifts in the base bands.<br>
      So all I have to do is changing the input of the devider from the
      EX1001 to the full range TXing Kenwood sets (attenuator added
      ;-))! WSPR and DFCW should be possible too in SSB mode with
      suitable AF modulation.<br>
      Thanks for the PA schematic too - it will be useful for future
      portable activities.<br>
      <br>
      Tu es 73,<br>
      Tom, DK1IS<br>
      <br>
      <br>
      Am 31.01.2015 um 11:35 schrieb M0FMT:<br>
    </div>
    <blockquote
      cite=3D"mid:1422700500.59551.YahooMailBasic@web173003.mail.ir2.yaho=
o.com"
      type=3D"cite">
      <pre wrap=3D"">Hi Tom

Nice array of rigs I also own a TS50 plus a TS690s quite good on the RX s=
ide at M/LF the TS50 lacks the RX filtering of the other rig.

My suggestion is build an GW3UEP TX but drive it with reduced power  (the=
 odd milliWatt) via divider chain from one of the rigs. That way you get =
the frequency stability and VFO agility (not that it is really needed) pl=
us side tone etc from the rig by using split working. You will have to re=
calibrate your mind to the actual TX frequency depending upon the divisio=
n quotient i.e /2 , /4 , /n etc. On RX read out would be direct of course=
.. Otherwise use a DDS as the TX exciter. (I use xtals).

<a class=3D"moz-txt-link-freetext" href=3D"http://www.gw3uep.ukfsn.org/10=
0W_QTX/100WTX/PA_cmos.gif">http://www.gw3uep.ukfsn.org/100W_QTX/100WTX/PA=
_cmos.gif</a>

<a class=3D"moz-txt-link-freetext" href=3D"http://www.gw3uep.ukfsn.org/10=
0W_QTX/QuickView/Quick%20View%20100W%20QTX.htm">http://www.gw3uep.ukfsn.o=
rg/100W_QTX/QuickView/Quick%20View%20100W%20QTX.htm</a>

There are also similar simple TX designs for 136.

This suggestion does not give you linear operation and is not suitable fo=
r sound card modulation applications such as WSPR (just as well IMHO) it =
is only suitable for=A0 On / Off=A0 keying modes such as CW/ Very Slow CW=
 QRSS/ Opera a form of CW/ NB direct shift RTTY/ Direct shift DFCW  will =
work OK.

Before I am corrected WSPR is possible but only via some jiggery pokery u=
sing a four direct frequency shift pattern. Clever Johan SM6LKM has crack=
ed it.

However some one on here may have done the modifications to the TS range =
but I have not heard about it myself.

Good luck

73 es GL Pete M0FMT IO91UX


--------------------------------------------
On Fri, 30/1/15, DK1IS <a class=3D"moz-txt-link-rfc2396E" href=3D"mailto:=
DK1IS@kabelmail.de">&lt;DK1IS@kabelmail.de&gt;</a> wrote:

 Subject: LF: LF/MF TXing for Kenwood TS950SD and TS50
 To: <a class=3D"moz-txt-link-abbreviated" href=3D"mailto:rsgb_lf_group@b=
lacksheep.org">rsgb_lf_group@blacksheep.org</a>
 Date: Friday, 30 January, 2015, 16:28
=20
 Hello Group,
=20
 are there any experiences with extendig the TX range of
 these Kenwood=20
 radios down to MF and LF? Long time ago I=B4ve already done
 the usual=20
 extensions for general TX coverage within 1.7 to 30 MHz by
 cutting some=20
 diodes but up to now I can=B4t find any modifications for
 MF/LF. With the=20
 TS950SD it possibly could be restricted to the driver
 output. Any ideas?
=20
 Thanks and 73,
 Tom, DK1IS
 <a class=3D"moz-txt-link-abbreviated" href=3D"http://www.qrz.com/db/dk1i=
s">www.qrz.com/db/dk1is</a>
=20


=2E

</pre>
    </blockquote>
    <br>
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