[TenTec] MFJ-644 SO2R Switch

[Donald L. Schliesser]

Has anyone used a Heil HC-5 headset element with this box ?  If so, 
where do I put the jumpers for Jumpers 5, 6 - the ones that are for the 
mike input and mike ground. The mike plug on the Heil headset is a 
monaural  3.5 mm plug.  The headset does not have a PTT line so I can 
supply that with my hand switch or foot switch.  Also has anyone used 
the box with an OMNI V, or any of the Ten-Tec 4 prong mike plugs?  The 
OMNI V has a 4 pin mike jack and realize I will have to re-wire the 8 
pin plug that is on the cable that comes with the box to a 4 pin plug.  
I am also aware that the directions in the book are scrambled in some 
places.

My radio 2 is a Yaesu FT-450 and I assume I can used the jumpers for the 
Modular Microphone setup for the FT-817, 857, 897, as shown in the book.

Any help and/or suggestions would be appreciated - I spoke to MFJ 
technical support and they were not much help.

Donald, K6RV