You will likely not find a "repair shop" for the Transworld TW100F Flyaway transciever.
SOME surplus military equipment dealers may work/reapir these units.
Datron listed them as obsolete -- they may have a few parts left from Transworld days.
These suitcase HF communication units were sold to the US government,
US State department for foreign US embassy usage and the US military (circa 1979).
Many of these units were surplused 5 to 6 years ago.
This unit is CHANNELIZED, like many HF radios for government usage.
Not all units have the LSB plug-in module -- since government users primarily use USB for phone.
Transworld TW100F/AT 1.6-30 MHz HF Transceiver, with automatic tuner in lid. 125W/10W power output.
12vdc or 110-245 VAC power input. Uses military 'new family' audio accessories.
AM/USB/LSB/CW/DATA modes. 11x20x15.5 inches.
In Good condition, with manual and accessories these units sell for $1500 through surplus dealers.http://www.meco.org/catalog/product_info.php?products_id=81http://www.american-milspec.com/p-544-tw100f-msop.aspx
WB9JTK has a 6 minute video for the operation of this TW100F unit.http://www.wb9jtk.com/vp5-wb9jtk.html
Some of these units have been de-militarized -- hence the reason for broken units.