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W4RT
Electronics
A Division of Optical E.T.C., Inc.
www.w4rt.com
GENERAL
One BIG Punch (OBP) is a custom add-on accessory for the Yaesu MH-36b microphone commonly used with many
Yaesu amateur radios. The One BIG Punch is an AF-based speech compressor specifically configured to provide
remarkable increase in talk power while maintaining good audio quality. The unit is mounted inside the MH-36b
and requires no additional electrical power. Performance of the One BIG Punch will vary from user to user because
of variations in the individual's voice power spectrum. As with any device used to increase the average output/talk
power, some users will realize more or less increase than other users. Explanation of speech processing
(compression) theory can be found in many places and, consequently, isn't provided herein. As with any audio
device, you may experience interference when it is placed in an RF field environment. The W4RT Electronics
design and implementation effectively mitigate RFI feedback issues. See the
One BIG Punch Installation Manual -
Advanced Technique
and the
One BIG Punch Installation
Supplement
for alternative installation instructions.
WARNING
−−
WARNING
−−
WARNING
READ CAREFULLY BEFORE PURCHASING THIS PRODUCT.
Installation of the OBP into the MH-36b requires reasonable skill with a soldering iron and simple
tools typically found in most amateur radio operators' ham shack.
W4RT Electronics
DOES NOT
Provide ANY Technical Support to Those that Install the One BIG Punch Themselves. If you don't
feel that you have the necessary skills to install the OBP after reading this instruction sheet
thoroughly, then
DON'T
purchase this product. Instead, please consider having W4RT Electronics
install the OBP for you for an additional fee.
INSTALLATION
Figure 1.
1.
Remove the rear cover of the MH-36b microphone and observe the internal PCB as shown in Fig. 1.
