TS 430S: Hello all, sorry if any of these mods are repeated in other files but this file (TS 430S-1) is a culmination of over 12 individual files that I have joined together for ease of printing. I can't be bothered to check!!!! de BOB G0LBQ - N6XDI ------------------------ From: VK4ALV@VK2EHQ MODS FOR THE KENWOOD TS430S FOR AMTOR. ABOUT THE TS430S,,THE MODS ARE AS FOLLOWS:- ON THE I.F.BOARD CHANGE C-164 FROM 0.22MFD TO 10NFD..50V CHANGE C-60 FROM 10MFD TO 4.7MFD. 16V.... PARALLEL A 150KOHM RESISTOR ACROSS R.109 USING A SMALL SWITCH OR BY WHATEVER MEANS YOU CAN DESIGN TO SWITCH THIS RESISTOR IN AND OUT. IN FOR ARQ AND OUT FOR ALL OTHER MODES. SOME PEOPLE USE THE SEND/REC SWITCH, OTHERS HAVE USED THE NOISE BLANKER SWITCH. I HAVE USED A SMALL MINI SWITCH WHICH I HAVE MOUNTED IN PLACE OF THE LEFT FRONT RUBBER FOOT. IT WILL PROBALY HELP TO CUT DIODE D-50 ON THE I.F.BOARD. IF YOU USE A 500HZ FILTER IN THE CWN OR SSBN POSITION THEN PARALLEL A 10MFD CAPACITOR ACROSS C-10 OR C-8. ADD A 10MFD CAPACITOR ACROSS C-161. (ACTUALLY I FOUND THAT THESE LAST TWO WERE NOT NECESSARY IN MY 430S.) YOU WILL FIND IT BEST TO TAKE THE AUDIO FROM IN FRONT OF THE VOLUME CONTROL, BUT THOSE PEOPLE USUING AUDIO FROM THE SPEAKER SOCKET SEEM TO GET OK RESULTS. REALLY YOU CAN GET AWAY WITH JUST THE FIRST TWO MODS, CHANGE C-60 AND C-164. THIS ORIGINALLY CAME FROM VK2AGE. 73S DE LARRY IN RAVENSHOE. -=-=-=- FROM: N0HME SUBJECT: TS430 NOISE BLANKER MOD KENWOOD TS-430 NOISE BLANKER MOD ON THE RF UNIT X44-1510-XX CHANGE THE FOLLOWING COMPONENTS: 1-CHANGE R80 TO 100K 1/4 WATT RESISTOR. 2-CHANGE R81 TO 56K 1/4 WATT RESISTOR. 3-CHANGE C125 TO A 560 PF 25 VOLT DISC CAPACITOR. NO REALIGNMENT IS REQUIRED ------- KENWOOD TS-430 AGC MOD THE TYPE OF SPEECH PROCESSOR CIRCUIT USED IN THE TS-430 IS AN AGC (AUTOMATIC GAIN CONTROL) DRIVEN AUDIO FREQUENCY AMPLIFIER. BY DECREASING THE TIME CONSTANT SUBSTANTIALLY, THE SPEECH PROCESSING EFFECT WILL BE IMPROVED. THE MODIFICATION IS VERY SIMPLE. REPLACE CAPACITOR C104 4.5 UF ON THE IF BOARD BY A SMALLER VALUE OF O.47 UF. TO MODIFY THIS CAPACITOR 1-REMOVE THE IF BOARD AS INDICATED FOR THE CW FILTER INSTALLATION. 2-REMOVE C104 FROM THE BOARD. 3-MOUNT A 0.47 UF CAPACITOR ON THE BOARD. 4-MOUNT THE IF BOARD AS INDICATED BY CW FILTER INSTALLATION. 5-YOU ARE NOW FULLY OPERATIONAL AGAIN. 6-ADJUST THE MIC GAIN WITHOUT THE PROCESSOR UNTIL NORMAL ALC DEVIATION. 7-SWITCH THE PROCESSOR ON AND ADJUST VR7 NEAR C104 UNTIL NORMAL ALC DEVIATION. (DO NOT ALTER THE MIC GAIN AT THIS TIME) 8-ENJOY THE SPEECH PROCESSOR IMPROVEMENT. FROM KF4NJ JOHN............RELAYED BY...N0KGX..GENE -=-=-=-=- TRANSMIT ENABLE FOR MARS AND CAP FREQUENCIES FOR THE TS430S For MARS and CAP transmit capability, a minor change is required: 1. Unplug the DC power cable. 2. Remove the top and bottom covers of the set. 3. Locate the RF unit connector 10. Diode D39 is near the connector (labeled D39 on the circuit board). Take a small pair of diagonal cutters and clip the lead at the top of the bend. 4. Locate IC-2 on the Control Unit, under the IF unit. Resistor R148 is near IC-2, clip the resistor lead. 5. This completes the modification. Reassemble the unit, being careful not to pinch any leads. ***->Be careful not to transmit out-of-band, or accidentally operate on any non-amateur, unless you are authorized to do so. DO NOT JEOPARDIZE YOUR LICENSE! RELAYED BY...N0KGX...GENE -=-=-=-=- FROM: N0HME SUBJECT: TS430 AGC MOD THE AGC MOD ON THE TS430 KENWOOD TO RUN AMTOR REQUIRES THREE COMPONENT CHANGES. ON THE IF BOARD--FIND AND REPLACE CAPACITOR C-60, A 10 MFD, WITH A 4.7 MFD. CLIP ONE OF THE CONNECTIONSNON DIODE D-50. REPLACE CAPACITOR C-164, A 0.22 MFD, WITH A 0.1 MFD CERAMIC. BOTH D-50 AND C-60 ARE ON THE UPPER LEFT CORNER OF THE IF BOARD AND ARE ALSO MARKED ON THE PC BOARD. HOWEVER...C-164 IS NOT MARKED CLEARLY. IT IS A 0.22 MFD CAN ELECTROYLTIC NEAR THE CENTER OF THE IF BOARD. IT IS JUST BELOW AND TO THE RIGHT OF C-149 AND IS DIRECTLY RIGHT OF IC-5. LOOKING AT THE BACK OF THE BOARD, ONE LEAD OF C-164 IS CONNECTED TO THE JUNCTION OF A 47K OHM RESISTOR (R-129) AND A GLASS DIODE (D-77). THESE TWO COMPONENTS ARE ALSO NOT MARKED ON THE PC, BUT ARE SOLDERED TO THE BACK OF THE BOARD. ONE OTHER NICE TOUCH WAS TO PUT IN-LINE WITH DIODE D-50, A SHORT PIECE OF COAX TO A MINIATURE TOGGLE SWITCH. THIS DISABLES THE MOD, SO THAT THE SMOOTH CHANGE OVER FROM TRANSMIT TO RECEIVE THAT THE 430 NORMALY HAS, CAN BE RESTORED WHEN ULTRAFAST RECOVERY IS NOT SO IMPORTANT. IN CW, WITH D-50 CLIPPED, THE RECEIVER KICKS BACK TO LIFE WITH A SHARP CRACK AND GETS ANNOYING WHEN THE GAIN IS REALLY HIGH, CHASING AFTER A WEAK DX STATION --FOR INSTANCE. SO THE EWITCH REMOVES DIODEHD-50 FOR AMTOR AND RETURNS IT TO THE CIRCUIT FOR ANYTHING ELSE. BEWARE! EVERYTHING IS VERY TINY, VERY CROWDED, AND VERY EXPENSIVE. 73S DE KA0SUN RELAYED BY...N0KGX...GENE -=-=-=- Date: Thu, 15 Jun 89 14:11:38 PDT From: beekman%a1_utrop2.DEC@decwrl.dec.com Subject: Trio - Kenwood TS430 extended coverage Author: Wim Beekman Date: 25-Oct-1988 Posted-date: 25-Oct-1988 ====================================================================== TRIO-KENWOOD mods and remarks -< Include 0-150kHz on your TS430 >- ---------------------------------------------------------------------- This modification is to include the receiving range from the TS430 from 0-150 kHz. Connect a resistor from 1K from IC1 pin 14 to ground in the PLL Unit. (Pin 14 from IC1 goes to the base of a transistor.) The best way to do this, is by soldering the resistor at the solder side of the PLL Unit PCB. Peter -PA3AEF- -=-=-=-=- A MOD FOR ALLOWING THE KENWOOD 430 TO TUNE DOWN TO ABT 10 KHZ IS TO CLIP R52 ON THE PLL BOARD. THIS LETS THE RECIEVER WORK DOWN TO 10KHZ OR SO. THE KENWOOD 430 WILL TUNE DOWN ON THE DISPLAY BUT GOES DEAD AT 149.99. 73S STEVE FRITTS WA4GZE@KT4F -=-=-=- For those of you wanting to know how to reset the microprocessor in the TS-430S, here's what it looks like in the service manual: 1) FUNCTION SW:A POWER SW:OFF Set the POWER SW ON while depressing the A=B key. Then release the A=B key. Hope this helps someone... -=-=-=-=- SB-888 TS-430S Intermittent PLL Unlock in FM/AM 10-17-84 Some owners of the TS-430S have reported intermittent loss of transmit and Receive when operating in the FM or AM modes, along with a loss of the digital display. The cause of this may be due to a loss of the FM/AM Heterodyne Oscillator signal. Replacing the components listed below will correct most instances of this failure. Procedure: ON the Control Unit (X53-1290-XX) change R131 to a 22 K ohm 1/4 watt carbon resistor, and change C144 to a 3 pF 25v Disc ceramic capacitor. Time required for this modification is 30 minutes. No realignment is required. CLM (c) 121589TKC -=-=-=-=- SB-887 TS-430S Noise Blanker Improvements 10-17-84 Some operators have indicated a desire to have their TS-430S noise blanker operate similar to the noise blankers in the TS-120/130S series. By performing the following modifications the operator will be able to increase the effectiveness of the TS-430S Noise Blanker Circuit. Procedure: On the RF UNIT (X44-1510-XX) change the following components. R80 change to a 100 K ohm 1/4 watt resistor R81 change to a 56 K ohm 1/4 watt resistor C125 change to a 560 pF 25v disc ceramic capacitor Note this is an optional change and may not be performed under warranty. No realignment is required. CLM (c) 121589TKC -=-=-=-=- SB-888 TS-430S Intermittent PLL Unlock in FM/AM 10-17-84 Some owners of the TS-430S have reported intermittent loss of transmit and Receive when operating in the FM or AM modes, along with a loss of the digital display. The cause of this may be due to a loss of the FM/AM Heterodyne Oscillator signal. Replacing the components listed below will correct most instances of this failure. Procedure: ON the Control Unit (X53-1290-XX) change R131 to a 22 K ohm 1/4 watt carbon resistor, and change C144 to a 3 pF 25v Disc ceramic capacitor. Time required for this modification is 30 minutes. No realignment is required. CLM (c) 121589TKC -=-=-=-=- SB-895 TS-430S PLL Unlock at High Temperatures (Revision) 9-14-85 This service bulletin supercedes bulletin 891, which concerned low input level to IC-16 as the radio warmed up. This bulletin incorporates information contained in Bulletin 891 plus additional information. PROCEDURE: On the Control Unit (X53-1290-XX) Check transistor Q8. If it is not a 2SC1815Y change it to this type (Serial numbers 408XXXX-509XXXX). For serial numbers before 408XXXX change R29 to 820 ohms and C41 to 100 pF. In addition to the changes listed above check for the following signals: (You must check these at a dial frequency of exactly 14.000.000 MHz) TP-1 6.0v (L18 adjusts) TP-2 70 MHz TP-3 45.3 MHz TP-4 6.35v (L10 adjusts) Time required for this modification is 1 hour or less. CLM (c) 121589TKC -=-=-=-=-=- PORTED AND REALIGNED FROM PC TO AMIGA FORMAT BY BOB G0LBQ - N6XDI.