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 (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) 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 division 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).
http://www.gw3uep.ukfsn.org/100W_QTX/100WTX/PA_cmos.gif
http://www.gw3uep.ukfsn.org/100W_QTX/QuickView/Quick%20View%20100W%20QTX.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) it is only
suitable for On / Off 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 using a
four direct frequency shift pattern. Clever Johan SM6LKM has cracked 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
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EC1A 7AJ via the snoops at GCHQ Cheltenham, thanks for your cooperation it is
appreciated.
--------------------------------------------
On Fri, 30/1/15, DK1IS <[email protected]> wrote:
Subject: LF: LF/MF TXing for Kenwood TS950SD and TS50
To: [email protected]
Date: Friday, 30 January, 2015, 16:28
Hello Group,
are there any experiences with extendig the TX range of
these Kenwood
radios down to MF and LF? Long time ago I´ve 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´t find any modifications for
MF/LF. With the
TS950SD it possibly could be restricted to the driver
output. Any ideas?
Thanks and 73,
Tom, DK1IS
www.qrz.com/db/dk1is
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