HARRIS HF AMPS RF-353 / RF-355 AUTOMATIC " TUNE FOR MAX "

R2
U3:B
+13.5V
1k
+5V
"N"
D
J9
Q2
S
6
RS232 OUT
TO TERMINAL
PINS 2,GND
PIN 3 GND
PIN 4 GND
PINS 5 NC
OBTURED
USED AS KEY
1
2
3
4
5
2N7000
G
RS232 OUT
10k
TO 1M
C9
+13.5V
8
J7
RB6/PGC
RB7/PGD
5
4
3
2
1
+5V
MCLR
16
CLKIN VFWD IN
VREF IN
COIL CW OUT
COIL CCW OUT
15
CLKOUT
RB0
RB1
RB2
RB3
RB4
MCLR Ref/Fwd IN RB5
RB6
VDD
RB7
PTT IN
TUNE IN
VSS SLOPE IN
PWM OUT
5
MCLR
R1
4
+5V
10k
14
+5V
C7
100nF
U1
C4
RA0
RA1
RA2
RA3
RA4
2
1
2
8
9
17
18
10
11
12
13
SLOPE
PWM
RB6/PGC
RB7/PGD
Q1
D
2N7000
5
R3 10k
C5
R4 10k
C6
C10
1
2
3
C8
100nF
7
METER REF/FWD
U4:A
3
1
RV1
J14
3
100k
LM358N
C11
"N"
100uF
PTT
3
REAR PANEL
DIN 3 OR 5 PINS
FROM TX
1
ALC
PTT
METER OUTPUT
+13.5 V INPUT
GND
3
2
1
C1
ALC TO TX
ALC
(IF NEEDED)
C2
1uF
78L05
VI
VO
1
+5V
C3
1uF
D
Q3 FAST METER CUT OFF IN RX
G
S
Q3
1
2
U2
+13.5V
2
PEAK
POWER
ALC FROM AMP
TUNING
REQUEST
+13.5V
1k
100nF
GND
470
1
+5V
100nF
2
IN TUNING LED
INPUT TUNE PUSH BUTTON
INPUT REF/FWD
+5 V OUT
0
1
100nF
1
TX
PTT
100nF
RV2
R8
6
1N4148
TX PTT GND INPUT
TX PTT + 5 TO 14 V INPUT
( ALTERNATIVE )
100k
D3
LM358N
MANUAL SWITCH
AMP
BY-PASS
10k
1 Meg
500 k
200 k
100 k
50 k
U4:B
IN/OUT COIL CCW
IN/OUT COIL CW
GND
0
4
PWM
10 kHz
3
2
1
8
SLOPE
D2
S
2
SLOPE
D1
CCW 0 CW
PTT
INVERTER
(IF NEEDED)
"N"
G
RV1 & RV2
10 uF
22 uF
47 uF
100 uF
220 uF
PTT OUT TO AMP
IN TUNING LED
PTT
R5
2
1N4148
2
1
PEAK HOLD TIME
J13
1N4148
1
2
6
7
3
100nF
1
10k
TO 1M
LM358N
PIC18F1320
Revision 2.x
C11
HARRIS
AMPLIFIER
3
PIC CODE BY
F/YO8RCM & F1FRV
J8
INPUT REF PWR 0-5 V MAX
INPUT FWD PWR 0-5 V MAX
1
J7 TO J11, Q2, R2 ARE NOT NEEDED IN
NORMAL OPERATION. USED ONLY FOR
PIC DEBUGGING AND PROGRAMMATION
ICSP
FOR PICKIT
+13.5V
ALC
R7
100nF
U3:A
RB6/PGC
2
1
4
J10
R6
LM358N
RB7/PGD
RS232 IN
NOTA: SLOPE JUMPER FOR METER LINEARIZATION
WITHOUT JUMPER (BY DEFAULT, 7 V @ TP1 @ 500 W) : 5 V = 750 W
WITH JUMPER (FOR 5.39 V @ TP1 @ 500 W) : 5 V = 1 kW
5
7
GND
+5V
2
J11
2N7000
THIS UNIT IS PLACED IN THE REMOTE CONTROL BOX
REVISION 3: ADDED JUMPER SLOPE, DIODES D1 & D2 (TUNING LED), AND PEAK POWER METER CIRCUIT
HARRIS HF AMPS RF-353 / RF-355
AUTOMATIC " TUNE FOR MAX "
DATE: 25/05/13
REV: 3
BY: [email protected]
DOC N°: AMATEUR RADIO
PAGE: 1/1
Automatic tuning for HARRIS amplifiers
Revision May 2013
PIC source code: " Tune For Max " rev 1 (12/2009) by Theo F/YO8RCM adapted and modified rev 2 by F1FRV.
PIC 18F1320 with internal oscillator "INTOSC" at 8 MHz. No xtal, as precise timings are not needed ....
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Outputs:
1 / Pin 6 RA2: Voltage 0 V for logic control CW (+) of the tuning inductor.
2 / Pin 7 RA3: Voltage 0 V for logic control CCW (-) of the tuning inductor.
3/ Pin 18 RB3: Linearized 0 to 5 V for 0 to 1kW for RF-355 ( 0 to 2 kW for RF-353) sent to meter.
Inputs:
1 / Pin 1 RA0: Measure voltage representing forward power (FWD PWR). Non linear.
2 / Pin 2 RA1: Measure voltage representing reflected power (REF PWR). Non linear.
3 / Pin 8 RB0: “PTT”. Pull up on the input . Set to ground in transmission .
4 / PIN 9 RB1: For pushbutton "TUNE". Pull up on the input . Set to ground, to start the automatic tuning process .
5 / PIN 11 RB5: For switch "FWD/REF". Pull up on the input . Set to ground, to have FWD power display on meter,
and, when switch is open , display on meter REF power .
6 / PIN 17 RB2: For jumper "SLOPE". Pull up on the input . Set to ground, to have meter linear scale 1 kW @ 5 V with TP1 5.39 V ,
and , when jumper is absent , have meter linear scale 775 W @ 5 V with TP1 7 V (by default in amplifier) .
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Tuning routines SIMPLIFIED description:
If RB0 is at ground (Transmission)
AND
If RB1 is at ground (Tuning request)
Measure forward power voltage (FWD PWR). Accuracy is limited at ~3.5 mV (5V / 1310.72), This gives an
hysteresis corresponding to ~ 3.5 Watts on scale 5V = 1 kW. Send 0 to 5 V linearized to meter.
Set output CW at 0 V, coil runs CW, check if FWD PWR voltage increases.
If it increases, we remains on CW.
If it decreases, set output CW at +5 V, and switch to CCW at 0 V, coil runs CCW.
FWD PWR voltage will increase. It will continue until it will be reduced again, then switch the active output
to +5 V, as the maximum FWD PWR voltage is exceeded. Tuning is now OK.
Depress push button “TUNE”, before any new tuning request .
Then loops from beginning……
At any time, during tuning,
If the PTT input RB0 goes to +5 V (Reception)
OR
If TUNE input RB1 goes to +5 V (no more tuning request)
The 2 outputs CW and CCW are set to +5 V to stop coil as it is, and loops from beginning.
Other features:
If RB5 is at ground (FWD power display) , front panel meter measures forward power (FWD PWR).
If RB5 is open (REF power display) , front panel meter measures reflected power (REF PWR).
That’s All Fox !!!!!!!!!!!!!
Web site: http://f1frv.free.fr
Enjoy …..
Mail to: [email protected]
Linéarisation approximative de l'affichage de puissance des amplis HARRIS par le PIC de "TUNE FOR MAX"
F1FRV
05/2012
V4.3
5.000
V OUT ON 0-5V METER
4.500
V FWD
@ DB25
0.000
1.335
1.695
2.115
2.500
2.866
3.150
3.410
3.650
3.830
4.000
P OUT
W
0
100
200
300
400
500
600
700
800
900
1000
V FWD
@ TP1
5.390
Power W
on meter
0
100
194
304
404
500
625
740
846
925
1000
Volts
on meter
0.00
0.50
0.97
1.52
2.02
2.50
3.13
3.70
4.23
4.63
5.00
Max
Error %
0.00
0.00
-3.06
1.25
1.08
0.00
4.03
5.39
5.40
2.71
0.00
4.000
3.500
V IN @ DB25 PIN 4
3.000
y = 1.6393Ln(x) - 0.0127
2.500
2.000
1.500
1.000
0.500
VALEURS POUR PROGRAMMATION DU PIC AVEC 5.39 V @ TP1
P min
P max
V IN min V IN max Range V Range W
0
100
0.000
1.335
1.335
100
100
500
1.335
2.866
1.531
400
500
1000
2.866
4.000
1.134
500
For PIC
LP slope
MP slope
HP slope
Slope
74.906
261.267
440.917
VALEURS POUR PROGRAMMATION DU PIC AVEC 7 V @ TP1
P min
P max
V IN min V IN max Range V Range W
0
100
0.000
1.770
1.770
100
100
500
1.770
3.960
2.190
400
500
775
3.960
5.000
1.040
275
For PIC
LP slope
MP slope
HP slope
Slope
56.497
182.648
264.423
DUE TO INTERNAL ~3 dB ATTENUATOR INSIDE AMPLIFIER INPUT CIRCUIT, ~100 W INPUT ARE REQUIRED TO HAVE 1 kW OUTPUT
NOTA Pour réglage facile, utiliser 300 W mesurés avec un wattmetre précis en sortie d'ampli (~ 30 W input).
Régler ajustable R7 pour avoir 2.115 V sur la sortie V FORWARD, pin 4 sur la DB25.
Pour avoir exactement 300 W, si votre TX ne permet pas le réglage de puissance en continu ( TS-480 par exemple)
mettre un peu plus de puissance en entrée, et ajuster les 300 W en dérèglant légèrement la self du PI (CW ou CCW).
1000
900
800
700
600
500
400
300
200
100
0
0.000
BRIDGE BALANCE
FOR 775 W MAXI
ADJUST FWD VOLTAGE
@ TP1 (BOARD A5):
7 V AT 500 W
FOR 1 kW MAXI
ADJUST FWD VOLTAGE
@ TP1 (BOARD A5):
5.39 V AT 500 W
OR
2.115 V AT 300 W
ON DB25 PIN 4
V FWD
V REF
SPECIAL REV 3 PCB WITH THE 4 HOLES AT SAME PLACE AS IN REV 2 , TO FIT IN EXISTING CONTROL BOX