100W Transmitter For 2200m by VE7SL
The transmitter utilizes a 4060 binary counter IC chip as both the crystal oscillator and frequency divider.I used a 2200 kHz crystal along with the 'divide-by' sixteen output to produce a signal at 137.5 kHz.
http://members.shaw.ca/ve7sl/2200mtx.html

136kHz 5W transmitter by OM2TW
Schematic of a 136kHz 5W transmitter.
http://www.qsl.net/om2tw/index_files/obsah_files/tx_136.pdf
 

137kHz CW Transmitter by OZ2CPU
This is the TX freq logic, using a 27Mhz CB xtal and dividers to generate the 136 Khz.Depending on how many outputs used the pulse width can also be controlled.
http://www.webx.dk/oz2cpu/radios/137kcw.htm

137kHz Low Power Transmitter by DF3LP
This is a very short description of my tiny low power cw transmitter for long wave. Depending on the PI-Filtercomponents and voltage for the final stage this transmitter would be able to reach the 100 Watts output level.
http://www.qsl.net/df3lp/projects/lftx/index.html

300W 136kHz Transmitter by GØMRF
The circuit is based around a high efficiency class D amplifier which uses two STW34NB20 power MOSFETS. The efficiency of the transformer design has been improved by Jim Moritz.
http://www.g0mrf.com/300w.htm

Build a 136kHz TX.... or two! by G3YXM
I have been using power-mosfets to produce several hundred Watts for some years now so it seemed a good idea to employ them on 136kHz.
http://www.wireless.org.uk/136rig.htm

Building a 'Lowfer' Beacon - 'Manhattan Style' - by VE7SL
A friend of mine in Ontario (Herb - VE3OHH) asked me if I was interested in building him a beacon transmitter for the licence-free LOWFER band (160 - 190KHz).
http://members.shaw.ca/ve7sl/lowfer.html

L. F. Transmitter using Direct Digital Synthesis by GØMRF
I've recently changed my LF driver from one which covers the band in 100 Hz steps, to the unit pictured below. This covers the band in increments of 0.25Hz and can operate "between the lines" of the Loran interference which is present throughout most of Europe.
http://www.g0mrf.com/dds.htm

PIC controlled CW/BPSK beacon transmitter by SM6LKM
This transmitter was designed to be used by Lowfers in the U.S.A. where unattended beaconing is allowed in the 1750 meter band.
http://home4.swipnet.se/~w-41522/lfbeacon/longwave.html