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General operating notices
  Holder bracket for transmitter straps
A stable transmitter hanger for fastening neck 
straps is standard equipment on the 
mc-20
 HoTT 
transmitter.
To unfold the holder brackets, fi rst press both 
brackets inward a bit near where they are lettered 
then turn them upward by 90 °. The brackets will 
automatically lock into position. 
If you have a neck strap fastened to the holder 
bracket with key-rings, fi rst press lightly on the right 
holder bracket to release its latch so it can be folded 
down then do the same with the left holder bracket. 
Afterward, press both brackets SIMULTANEOUSLY 
into the recess.
The following straps are available as accessories:
Order no. Description
71.26 Transmitter 
straps, 
Graupner HoTT
72.40 
Transmitter straps, deluxe
  Installation of switches, switch modules and knob 
modules
There are a total of 20 holes in the transmitter's 
housing available for mounting accessory modules.
To be safe, always disconnect the transmitter battery 
before installation to avoid short circuit conditions. 
Be sure to pay attention that soldered points on the 
transmitter board do not come into contact with metal 
objects!
Unoccupied holes in the transmitter's housing are 
closed with blind plugs. These can easily be pulled 
out from the outside with one's fi ngernails.
Insert the accessory switch, etc. through a hole in the 
housing from the inside.
Accessory switches, potentiometers, etc. are 
fastened into place by screwing a nut onto the 
threaded shaft protruding though the housing and 
tightening it with a suitable wrench. If the control has 
a knob, it can be reattached after the nut is tightened 
down. Trim nut wrench (order no. 5733) is well suited 
for tightening down these nuts.
Trim nut wrench (order no. 5733) is well suited 
for tightening down switch element trim nuts. 
  Aligning the antenna
The removable, articulated antenna is to be screwed 
into the ball-joint connector then aligned by hand. 
The antenna exhibits very limited fi eld strength 
straight out from its end, pointing it directly toward the 
model is wrong.
When screwing in the antenna, pay attention that the 
center pin in the antenna socket does not get bent or 
pressed back in the socket.