Kenwood TH-F6 A (TH F6A THF6A) modifications service menu switch

   
 
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23 October 2014, 9:42 UTC 


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Kenwood TH-F6 A (TH F6A THF6A)
Kenwood TH F6A
Programming interface schematics for Kenwood:
Programming software for Kenwood TH F6A :
PDF User Manual for Kenwood TH-F6A (TH F6 A THF6A) : Kenwood TH F6A Instructions Manual
PDF Dealer's Manual for Kenwood TH-F6A (TH F6 A THF6A) :
PDF Service Manual for Kenwood TH-F6A (TH F6 A THF6A) :
Schematics for Kenwood TH-F6A (TH F6 A THF6A) :
   Kenwood TH F6A Block diagram
   Kenwood TH F6A Schematics

Mods for Kenwood TH-F6A (TH F6 A THF6A) :
   Kenwood TH F6A "Service Menu" documentation project page: 1, 2, 3, 4, 5, 6, 7
   Kenwood TH F6A MARS/CAP (extended transmit)
   Kenwood TH F6 A - TH F7 E "morphing" ;-)
   Kenwood TH-F6 A Service Menu switch

Known issues and problems for Kenwood TH-F6A (TH F6 A THF6A) :
   Kenwood TH F6A defective charging jack problem
   Kenwood TH F6A external power source/charging problem
   Kenwood TH F6A low modulation level problem

Kenwood TH-F6A (TH F6 A THF6A) technical specifications :  Kenwood TH F6A technical specifications

Kenwood TH F6A (TH-F6A THF6A) service menu switch

   On TH-F6 transceiver, the “Service Menu” is accessible only by opening the transceiver. The “Service Menu” contacts are shown in the following picture, close to the “1” and “4” keys.

Kenwood TH-F6A modifications

It is obviously that this design is not very flexible for “daily” use. Maybe this is why people are not (yet) playing too much with “Service Menu” on this transceiver.
This is why I decided to build an external switch for “Service Menu”. My best idea was a Reed switch. I bought the smallest one (thanks Good I got two of them ;-) and I started “the best place for Mr. Reed chase”. In the process, one Reed switch died ;-)
The best place I have found is shown in the next picture:

Kenwood TH-F6A modifications

All you need is two pieces of thin wire and one small Reed switch. After the case is closed, entering the ”Service Menu” is done using a small magnet (from about half inch distance).
Using this solution I was able to play with “Service Menu” and find the “low modulation problem” fix.
I also think the power level on battery will be interesting to “recalibrate”. I’ll be back in a few days with results…
Enjoy ;-)


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