507 / Patriot Users Manual
Release 1.01
March 10, 2015
Part #74485
Printed in USA
Page
5
of 15
2.2 SELECT and FUNCTION Pushbuttons
Three functions, and three settings for each
function, are selected using the front panel
FUNCTION
and
SELECT
pushbuttons.
Green
,
Yellow
and
Red
LED’s indicate which
function or setting is currently selected.
Using the
FUNCTION
button, the user may
choose among the following:
BW
– I.F. filter bandwidth
(default is Wide)
Green LED
STEP
– Tuning step size
(default is 100 cycles)
Yellow LED
BND/USER –
Band selector and a User-
programmed function
(default is 40 Meters)
Red LED
Using the
SELECT
button, the user chooses the
programmed setting for each function:
BW
– W (wide ~ 2.5 kHz) Default Green LED
M (medium ~ 1.5 kHz)
Yellow LED
N (narrow ~ 800 Hz)
Red LED
STEP
– 100 (Hz) Default
Green LED
1K (Hz)
Yellow LED
10K (Hz)
Red LED
BND/USER
– 40M Default
Green LED
20M
Yellow LED
U3 (user program) Red LED
2.3 40/20 Meter Band Selection
The default band selected is 40 meters. To select
a different band, press the Function button until
the Red Function led is on and then press the
Selection button until the Yellow led is on. If
doing this from turn-on Press the Function 2
times and the Selection 1 time. You should hear
a relay click inside the 507 as this is configuring
the low-pass for correct operation on 20 meters.
Pressing the Selection 2 more times will return
the 507 to 40 meters.
2.4 Tuning Procedure
When power is turned on the Patriot 507 will be
tuned to the SSB QRP calling frequency: 7.2850
MHz on the 40 meter band. When the 20 meter
band is selected, it will be tuned to the SSB
calling frequency for 20meters, 14.285 MHz.
The front panel does not have a frequency
display, however a display may be one of the
Arduino programming and interface functions
added by the user.
Note: The ChipKit project code can be changed
so that the default start up frequency is on 20
meters or anywhere on 20 or 40.
The default frequencies in the code for each
band are set in the variables “meter_40” and
“meter_20”. Likewise, the default band in the
code is selected in the variables “bsm” and
“frequency_default”. These can be changed by
the user in the code as desired and then
reprogrammed into the Patriot.
The TUNE knob controls the operating
frequency in the following manner:
As the TUNE knob is turned, the LED in the
center of the TEN-TEC logo at the upper right of
front panel will flash with every tuning step, as
selected by the user. For example, if the 100 Hz
step size is selected and the user wishes to tune
to a frequency 1 kHz higher than the startup
frequency the user would turn the knob
clockwise and count ten flashes. Although this
method may seem cumbersome, it allows the
Patriot 507 to be operated immediately, without
additional user programming.
The radio is factory programmed to avoid
operation outside the amateur bands. When
tuned to the band edge, the LED remains lit to
show that the tuning limit has been reached.
Please note: The code can be modified to
operate in a very specific section of each band if
needed. E.g. the band edges are modifiable.
There are many other values in the code that can
be changed. For example, given tolerances and
variances in some parts, you may want to adjust
your “tuning” frequency in the code to adjust the
