DATE: 15/05/13
HARRIS HF AMPS RF-353 / RF-355 FULL REMOTE CONTROL INTERFACE
REV: 2a
PAGE: 1/1
BY:
[email protected]
3 TO GND 16 REF PWR 4 FWD PWR 17 GND 6 PTT IN 7 AMP ON/OFF 20 COIL CW 8 OPT. AGC 21 COIL CCW 9 GND 22 GND
DOC N°: AMATEUR RADIO
J1 1 14 2 15 3 16 4 17 5 18 6 19 7 20 8 21 9 22 10 23 11 24 12 25 13
DB25-FEM
5 9 4 8 3 7 2 6 1
2 1 6 9 3 7 4 8 5
WIRES NUMBERS FOR DB9 CONNECTOR ON CONTROL BOX REAR FEMALE ON BOX (MALE ON CABLE)
MINIMUM 8 WIRES + SHIELD TELEPHONE CABLE 4 SHIELDED PAIRS AWG24 ( ~0.2 mm2 ) MINIMUM C.S.A. NECESSARY LENGTH FOR ACCEPTABLE BLOWER NOISE LEVEL IN THE SHACK
IF AGC IS NOT USED, DOUBLE THIS WIRE
BY-PASS
1k
ON
WITH OR WITHOUT AMPLIFIER
2N7000 "N"
S
D
MANUAL TUNING
G
ON-OFF
CCW 0 CW
100nF
10k
+12 TO 14 V ~150 mA REMOTE ON/OFF (MANDATORY)
REF 0 TO 5 V
FWD 0 TO 5 V REF/ FWD
OR ALC 0 TO -8V ONLY WITH OPTIONAL BOARD
ON
BATTERY SUPPLY 13.8 V 150 mA
STANDARD ADJUSTMENT TP1: 7.00 V @ 500 W
1 V = 125 W 2 V = 250 W 3 V = 375 W 4 V = 500 W 5 V = 775 W
SPECIAL ADJUSTMENT TP1: 5.39 V @ 500 W
Volts
FWD / REF POWER
1.135 V = 100 W 1.695 V = 200 W 2.115 V = 300 W 2.866 V = 500 W 4.000 V = 1000 W
GND
PTT +5 TO 14 V to be supplied by TX Current < 1 mA
PTT +5 V in RX (by amp) To be grounded by TX Current< 1 mA
REAR PANEL DIN 3, 5 OR 7 PINS FROM TX 2
3
1
BANDSWITCH IS IN AUTOMATIC MODE WITH OPTIONAL BANDS DECODER COIL TUNING IS IN REMOTE MANUAL OR IN FULL AUTOMATIC OPERATION WITH THE "TUNE FOR MAX" BOARD
BEWARE !!! DISPLAY IS NOT LINEAR. SCALE IS LINEAR ONLY WITH THE "TUNE FOR MAX" BOARD
V REF
FROM OPTIONAL ALC +13.5V EXTERNAL REQUIRED
PTT
FROM BOARD A7 CW AND CCW V FWD
IT IS SUGGESTED TO READ F1FRVs COMMENTS IN OPERATION MANUAL PAGES 37 & 38, AND INCREASE HIGH VOLTAGE !!!
7 V @ 500 W V FWD
R25
V REF
LOOP GAIN CONTROL FULL CCW TO INCREASE POSSIBLE POWER. SEE LED DS2 GLOWING.
IF BIAS CURRENT IS MORE THAN 60 mA, OR LESS THAN 40 mA, SEE MOD DESCRIBED IN F1FRV's SERVICE MANUAL PAGE 139 WITH COMMENTS ABOUT R93.
MAX AM CARRIER ADJUST FULL CW FOR FULL PWR (NOT ADVISED !!!). BY DEFAULT 250 W, CAN BE INCREASED UP-TO 350 W
MAX PLATE CURRENT ADJUST SEE ALSO F1FRVs OPERATION MANUAL PAGES 37 & 38 ... MAX POWER ADJUST FUL CW = FULL PWR
R121
TUNE PWR ADJUST FOR ANTENNA TUNER WHEN "TUNE PWR" ON. (200 W BY DEFAULT) WITHOUT MODIFICATIONS DESCRIBED LATER ON TO INCREASE PTT SPEED
R122 LED DS2 (YELLOW), GLOWS WHEN POWER LIMITATION.
IF FULL PWR IS MORE THAN 500 W, ADJUST R29 FOR 8 V AT YOUR MAX FULL POWER (1 kW). IT CAN BE NECESSARY TO ADD A RESISTOR "R-X" AT U3A PIN 3 TO GROUND. 100 TO 150 k IS GENERALY ADEQUATE VALUE.
R29 AJUST ALC VOLTAGE AM CARRIER U1: MC1558
GAIN CONTROL
FOR INFORMATION ONLY ! CR3 IF SET TO GND (BY PWR TUNE) INHIBITS REFLECTED VOLTAGE AND ALLOWS FOR HIGH SWR AT LOW TRANSMITING TUNE POWER (200 W).
GAIN CONTROL WITH 1 PIN OF R121 REMOVED COUPLER TUNE POWER R73 IS NEVER ACTIVE. AND, HIGH SWR PROTECTION IS MAINTENED.
FROM R121
FROM R122
WITH 1 PIN OF R122 REMOVED POWER CONTROL R74 & ALC ARE ALWAYS ACTIVE.
MINIMUM PTT MODIFICATION: ONLY A WIRE FROM JUMPER E13-E14 TO PTT SWITCH (BOARD A7A1)
OTHER MODIFICATIONS: OTHER JUMPERS, DIODES AND MOSFETs ARE NOT MANDATORY FOR SIMPLE USE
PTT FROM A7 ON EXISTING JUMPER
R129
PINS 2 & 4
E13-E14
D WIRE TO E37/E39 G S
JUMPER E34-E37 2 JUMPERS BEFORE MODIFICATION 2 x DIODES AFTER MODIFICATION
+5V
JUMPER E36-E39
WITH THIS ARRANGEMENT, THERE IS AN IMPROVEMENT IN PTT SPEED IF YOU SET THE "TUNE PWR" SWITCH IN THE "ON" POSITION, HIGH VOLTAGE IS PLACED PERMANENTLY ON TUBE. THERE IS NO LONGER HV RELAY AND HV STEP START RELAY ADDITIONAL DELAYS AT EACH PTT KEY DOWN.
+5V WHEN BANDSWITCH IS MOVING
TO DB25 PIN6
WIRE TO DIODE D5 (BOARD A7A1)
ONLY IF TUNE SWITCH IS ALWAYS ON !! UNSOLDER ONE PIN OF R121 (A5 BOARD) TO MAINTAIN POWER AUTOMATIC REDUCTION ABOVE SWR >~2/1. TUNE PWR CONTROL R73 IS NEVER USED. AND UNSOLDER ONE PIN OF R122 (A5 BOARD) TO USE ALWAYS MAX POWER ADJUSTMENT BY R74.
THIS IS TO AVOID ERRORS WHEN BAND SWITCH IS IN "AUTO" WITH AUTOMATIC BAND DECODER. PROTECTION IS MAINTAINED IF BAND SELECTION IS IN MANUAL
WIRE TO E37+E39+10k TIED TO +5V ON JUMPER E13-E14 WIRE FROM FRONT PANEL PTT SWITCH (BOARD A7A1)
E34
D2
E37
REPLACE JUMPER E34-E37 BY DIODE 1N4148
TO BIAS SWITCH
3 SPARES TO DB25 TO PIN 20 TO PIN 8
WIRE TO 2N7000 Q1 (DRAIN)
TO PIN 21 R112 TO R114 NOT INSTALLED
TO ANTENNA RELAY
U11,U20,U30: ULQ2003A DRIVERS 500 mA @ 50 V MAXI
IMPORTANT !!!!!!!! THE 1N4148 FOR JUMPERS E36-E39 AND E34-E37 ARE TO AUTHORISE THE PROCESSOR TO BY-PASS AMPLIFIER IN CASE OF FAULT, AND WHEN BANDSWITCH IS MOVING BETWEEN 2 BANDS.
REPLACE JUMPER E36-E39 BY DIODE 1N4148
WIRE TO R129 (BOARD A6)
WIRES TO JUMPER E13-E14 ON BOARD A6 AND TO BAND DECODER J12 PIN 4
TO R19 PIN 10
WIRE TO BAND DECODER CONN J12 PIN 3. SEE OTHER NECESSARY MODIFICATIONS IN "BAND DECODER" DOCUMENTS
WIRE TO J1 PIN 2 ON BOARD A6
WIRE TO J1 PIN 4 ON BOARD A6 BREAK STRIP
TO S1 PIN 10 FROM R11/D3
TO Q4 BASE TO Q4 BASE
PTT
NOTA: BS250 CAN ALSO BE A ZVP2106A
NOT MANDATORY, BUT MORE LOGICAL....... DS3 OPERATE TO BE REPLACED BY A RED LED DS6 POWER ENABLE TO BE REPLACED BY A GREEN LED
BREAK
WITH F1FRV BAND DECODER BOARD AND MODS, FOR AUTOMATIC BAND SWITCHING : FRONT PANEL BANDSWITCH MUST BE PLACED ON POSITION "AUTO". LOCAL MANUAL BAND SELECTION IS STILL POSSIBLE (WITH THE BCD SWITCH). SEE DESCRIPTION AND MODIFICATIONS ON "AUTOMATIC BAND DECODER" PAGE. DONT WORRY ABOUT POSSIBLE FAULT LED "ON" DUE TO CODE 06 INDICATIONS !!!!!!! AFTER EACH REMOTE BAND CHANGE, THE RED LED "FAULT" COULD BE ON, UNTIL NEXT PTT DOWN. THIS HAS NO INCIDENCE ON NORMAL OPERATION.
WITH "Q2" 2N7000, OPERATE LED IS ONLY ACTIVE WHEN PTT LOCAL KEY IS AT GND. THIS IS ONLY NECESSARY WITH MODIFICATION MADE WITH Q1, 1N4148's AND STRAPS AS DEFINED ABOVE PAGES.
TO HAVE STANDBY LED ACTIVE WHEN TUNE SWITCH IS ON: BREAK STRIP R11- Q4 (BASE), AND INSTALL D3 1N4148.
FROM D4 AND Q5 SOURCE
TO Q3 GATE
