T71RTN Low Band (42-50 MHz cut) Motorola
MICOR mobile modification to six meters.
Paul J. Lorona

All capacitors ar +/-5%, 500V silver mica unless otherwise noted.

Receiver strips are designed to use the Motorola K1003 channel
elements, but I have found that the K1005 elements can be used
without modification. Each TLB6854 or TLB6864 receiver will require
the following parts to be changed -

C108				22pf
C109 C110			62pf
C113, C116, C118, C120		18pf
C114				120pf
C122				3pf		+/-0.25pf, NPO
C125, C127			33pf

Exciters are designed to use the Motorola K1004 channel elements,
but the K1007 can be used if modified. Remove the existing crystal
from the K1007 to expose three resistors. Two of them should be
4.7kohm, change these to 10kohm. Change the third resistor to
2.2kohm. Install the new crystal. Each TLB8164 exciter needs to have
the following parts changed for operation in the six meter band -

C425, C429			18pf
C430				90pf
C432				5pf		+/-0.25pf, NPO
C434				240pf
C435				150pf
C438				68pf
C441				82pf
C442				200pf
C444				56pf
C445				62pf
C446, C453			2pf		+/-0.25pf, NPO
C448				33pf
C449				100pf
C451				91pf
C452				47pf
C455				39pf
C456				160pf

The power amplifier does not normally need to be modified.

This concludes the six meter modification.