[Kenwood] Kenwood Twins 6 & 2 meter converters

Fri Oct 2 15:45:28 EDT 2009

Bill, w0ng asked:
> Good morning -
>>>> I'd like to ask the list members help with my R-599D receiver.
>> How is the actual receive frequency determined when using the 6 and 2
> meter onboard converters?
>> I can't seem to figure how the "A" and "B" positions on the bandswitch
> match up with the VFO dial markings (0-600).
>> Both the instruction and service manuals fail to explain this
> calculation.
>> All it says is that the 2m converter covers 144.0 to 147.4 Mhz and the
> 6m covers 50.0 to 53.4 Mhz.
>> Somewhere along the way I lost the point, hi.
>> Any help appreciated. 73, Bill, w0ng
>
Hi Bill,
The converters work with the receiver on it's ten meter band. Notice
that the ten meter band covers a 1.7 MHz wide band from 28.0 to 29.7
MHz in three ranges of 600 kHz width in each of those three ranges
with some overlap. The converter has two ranges and the crystal in
each range converts the bottom of its bub band (part of the VHF band)
to 28.0 MHz. So band A converts 144.0 MHz to 28.0 MHz and you work
your way from there up to 145.7 MHz when the ten meter receiver
setting are from 28.0 to 29.7. Using the B range on the converter
starts with 145.7 MHz at 28.0 on the ten meter band and 147.4 MHz at
29.7 on the ten meter dial. The six meter converter works the same
way. In other words, you have to be on the ten meter band when you are
using the converters or nothing is going to happen. You also have to
do the math to translate parts of the tuning range to that ten meter
band. I have only the two meter converter in mine and I have used it
with the FM mode in the receiver to monitor local repeaters.
73,
Bill KU8H