VFO-1000 MANUAL FOR FT-101


DESCRIPTION
The VFO-1000/FT-101 is a Direct Digital VFO for all Yaesu FT-101 models except the FT-101Z and FT-101ZD.  It provides the same VFO function as the FV-101B, with the extreme accuracy and stability of modern digital techniques.  There is no installation except to plug it into the External VFO connector on the FT-101. A separate PTT connection is required to use the RIT function but is not required for normal VFO function.  There is a PTT output jack on the back of the FT-101 that can be used to provide PTT to the VFO.  There are 11 bands corresponding to the 11 bands on the FT-101.  Each VFO band can be calibrated to compensate for aged crystals in the transceiver.  Once that is done, you will never again be told that you are off frequency.  Power is from the FT-101.

SPECIFICATIONS
Bands Covered             80, 40, 20, 15, 10A, 10B, 10C, 10D, 11, WWV, 160
Frequency Accuracy     Plus or Minus 10Hz
Frequency Stability       Plus or Minus 5Hz
Tuning Steps                1KHz, 100Hz, 10Hz, 1Hz
RIT Tuning Step           10Hz Fixed
RIT Tuning Range        Plus or Minus  3KHz
Display Digit Size          5/16" High                     
Dimensions                   6" X 6" X 3.5"

INSTALLATION
Included is a cable with color coded RCA plugs on one end and color coded wires on the other end.  One wire has an alligator clip and three are bare wire.  There is also a ground lug.  Use the included wire nuts to connect the bare wires to the connection posts shown in the photos.  Of course all connections can be soldered if prefer.

VFO CONTROL                  SPARE                             SPARE

  POWER                          VFO SIGNAL                      PTT IN

To help identify the correct connection posts, they are labeled on the printed circuit as follows.

RED wire connects to post labeled 14
BLACK wire connects to post labeled SS
BLUE wire connects to post labeled B
RED clip connects to post labeled OUT
BLACK wire with ground lug, see photo

FRONT PANEL CONTROLS
BAND is a dual push button switch used to step UP or DOWN to select the desired band.

RIT enables the RIT function.  To use the RIT, PTT must be connected to the PTT jack on the back panel, and the RIT switch must be ON.

STEP is the push button switch located to the lower right of the tuning knob.  In the operate mode it is used to select the desired tuning step.  It is also used during the setup procedure  Pushing the STEP button switches between 10Hz and 100Hz tuning steps.  Holding the STEP switch and pressing the UP button switches to 1KHz and holding the STEP switch and pressing the DOWN button switches to 1Hz tuning step. Pushing the STEP button again switches back to switching between 10Hz and 100Hz tuning steps.

SETUP
The only setup that may be necessary is the Calibration, to compensate for aged crystals in your transceiver.  All other setup has been done.

To enter the SETUP MODE, using the POWER SWITCH on the rear panel, Power Up then immediately press and hold the STEP button until "Setup Mode" appears, then release button.  Each mode shows for about 5 seconds. Press the STEP button to enter the mode you want when it is displayed.  If you don't pick any of them, it will proceed to normal operation.  Calibrate is the only setup mode you should need.

Calibrate Bands  (Indicated by a "C")
You will need a known station on each band to calibrate against.  There are shortwave stations that can be used on some bands.  Accurately  tune to the reference signal.  If the display is not reading correctly, that band needs calibrated.  Enter the setup mode as described above.  When the "Cal. Bands" message appears, Push the STEP button.

Using the TUNING KNOB, tune the display to read the correct frequency of the known signal.  The VFO does not change, only the display changes.  Next push the Up or Down switch, then Power Down the VFO.    That band is now calibrated.  Repeat this for any other bands you wish to calibrate.

The following setup instructions are for reference, just in case some unknown event causes your unit to require a full setup.

BAND# BAND FREQ SET IF OFFSET
DISPLAY
1
 		80
 		3.5
 		12.7
 		12.700.000
2
 		40
 		7.0
 		16.2
 		16.200.000
3
 		20
 		14.0
 		23.2
 		23.200.000
4
 		15
 		21.0
 		30.2
 		30.200.000
5
 		10A
 		28.0
 		37.2
 		37.200.000
6
 		10B
 		28.5
 		37.7
 		37.700.000
7
 		10C
 		29.0
 		38.2
 		38.200.000
8
 		10D
 		29.5
 		38.7
 		38.700.000
9
 		11
 		27.0
 		36.2
 		36.200.000
10
 		WWV
 		10.0
 		19.2
 		19.200.000
11
 		160
 		1.8
 		10.7
 		10.700.000

Set The Number Of Bands
When the "Set # Bands" message appears, Push the STEP button.
Use the Band up/down switches to set the number if bands to anything from 1 to 14.  When finished, press STEP button to exit, then it will go to normal operation.  If you add bands, those extra bands may have bad data in them, so you should check the other setup data for those bands.

Set IF Offsets  (Indicated by a "F")
When the "Set IF Offsets" message appears, Push the STEP button.
Select the desired band, and enter the IF OFFSET shown in the chart  below.  The tuning step is 50KHz in this mode.  Repeat this procedure for all bands.  Next push the Up or Down switch, then Power Down the VFO.  Alternately you can wait 1 minute and all entries will be saved and the VFO will revert to normal operation.

Set Band Freq.  (Indicated by a "S")
When the "Set Band Freq" message appears, Push the STEP button.
Select the desired band, and enter the BAND FREQUENCY shown in the chart  below.  The tuning step is 50KHz in this mode.  Repeat this procedure for all bands.  Next push the Up or Down switch, then Power Down the VFO.  Alternately you can wait 1 minute and all entries will be saved and the VFO will revert to normal operation.

Reset/Clear
When the "Reset/Clear" message appears, Push the STEP button.
You are asked to confirm with another STEP button press. All IF Offsets and Band Frequencies are set to 0.0.   Progress is displayed on the LCD.   If you do nothing when it asks "Confirm" then after a few secons it will say "Nothing Done"  In either case it proceeds to normal operation.


OPERATION
VFO operation is controlled by the VFO switch on the transceiver. Since the VFO-1000 displays the entire frequency, it is necessary to set the operating band using the dual push button band switch to step Up or Down to the operating band.  The bands are numbered 1 to 11 on the right of the display.  The last frequency used on each band is saved.

RIT OPERATION
The RIT should only be used when a PTT signal is connected to the VFO-1000.  There is a PTT jack on the back of the FT-101 that can be used. When the RIT switch is ON, and PTT is connected, RIT will be active when the FT-101 is in receive mode. You can then tune the receiver independent of the transmitter.  A shorted  plug is included and is plugged into the PTT jack to inhibit the RIT if PTT is not connected.

Electronic Specialty Products •  3054 Moore Drive •  Oviedo, FL 32765
Phone 407-366-4859