This is the mods.dk newsletter. In this Edition, you will find a list of all the new & updated articles now on our site. New articles. Created: 07-11-2010 Icom IC-746 Subject: IC746 Unstable Driver Bias FIX Bad SSB modulation on VHF ?? Driver Bios current are not stable. D13 are plased in the Pa board in the airflow from the culing fan. In the IC756PRO. Click here to view the article. Created: 24-12-2010 Icom IC-2200 Subject: IC-2200H To enable Fm narrow select Remove alan cap screws on face of radio, remove dial by simply pulling on it to gain access to the second alan cap screw, remove and face will pop of. Click here to view the article. Created: 28-12-2010 Icom IC-A20 Subject: Icom IC-A20 extended frequency. To extend frequency range (high end)from 135.975 to 136.975 MHz, proceed as follows: Remove 4 screws holding back panel, Remove 4 screws holdi. Click here to view the article. Created: 02-01-2011 Icom IC-2820 Subject: IC-2820 audio quality improvment in TX mode To execute this improvement it is recommended to have the required tools and the experience in SMD circuits, as we are dealing with electronic compone. Click here to view the article. Created: 09-01-2011 Icom IC-77
Subject: IC-77 tx expansion For Ham Mod remove the lower RIGHT diode (d14) from the pcb behind the lock button. it looks like this: [d12] [d13] [d11] [d14] For TX ex. Click here to view the article. Created: 09-01-2011 Icom IC-M710 Subject: Jenal SC2 or SC3 for Icom IC-M710 Modifications for using the SC2 or SC3 with the Icom M710 Download the PDF file. Click here to view the article. Created: 10-01-2011 Icom IC-7200 Subject: IC-7200 Pin diode failure causing very big loss in RX sensitivity
The ICOM IC-7200 is a very nice transceiver. But sometimes this transceiver is very fragile if you operate it very closely from another station as f. Click here to view the article. Created: 21-11-2010 Kenwood TK-3102 Subject: TK-3102 mod This is the software modification of the famous TK3201. Thin nice rig have 16 channels, scanning, scramble and subaudible signalling (PL and DPL). I r. Click here to view the article. Created: 28-11-2010 Kenwood TM-451 Subject: Repeater Function / Hidden Menu TM-451 Not written in the service-menu (REV+PWRon) is 68 : clone : to activate cloning (you must have a cloning clable) 69 : repeater : off/repeat/cr. Click here to view the article. Created: 03-12-2010 Kenwood MC-85 Subject: Problems with the Kenwood MC-85
I am not the only one to experience problems with this versatile and 3 radio switching desk microphone. Mine is probably 20 years old and I have had 3. Click here to view the article. Created: 05-12-2010 Kenwood TS-450 Subject: Improve receive sensitivity 500 Hz - 1.620 MHz for TS-450 and 690 As is customary with most transceivers built in the last 25 years, the TS-450 has a 20db attenuator that affects the AM broadcast band below 1.620 MHz. Click here to view the article. Created: 09-12-2010 Kenwood TH-D7 Subject: Battery pack BT-11 for Li-Ion cells remove top plate, cut it for two pieces and make them ONE milimeter shorter solder wire to plate (+) Solder copper tape to (-) Remove dio. Click here to view the article. Created: 11-12-2010 Kenwood TH-F6 Subject: The Keys/Buttons on your TH-F6A That "joystick button" on the upper just below the display: [MNU] Press inward, [->] push to Right, [<-] push to Left, [v] push toward bottom of ra. Click here to view the article. Created: 12-12-2010 Kenwood TM-D710 Subject: TM-D710 transponder activation. Download the complete PDF file. Click here to view the article. Created: 12-12-2010 Kenwood TH-D72 Subject: KENWOOD Th-d72 tx frequency expand After two diode remove apply full reset Click here to view the article.

Created: 13-12-2010 Kenwood TS-870 Subject: TS-870S PLL lock problem. The TS-870S may go into PLL unlock when SO-2 is installed, resulting in an "ERR" message displayed. This cause by insufficient bias of Q501 on the PLL. Click here to view the article. Created: 01-01-2011 Kenwood TS-2000 Subject: TS-2000 receiver crackling noise problem The symptoms is as follows: Suddenly there are strong receiver noise like static crashes, the noise can come and go but many have reported it to appe. Click here to view the article. Created: 08-01-2011 Kenwood TS-790 Subject: TS-790 Unlinear Modulation 2m SSB (probalbly 70cm also 70cm) The Problem: Bad (unlinear) modulation in 2m SSB Solution (may apply also for 70cm): In my case the unlinearity was caused by a drop of the voltage. Click here to view the article. Created: 10-01-2011 Kenwood TH-D72 Subject: TH-D72, Expand TX in Vhf and Uhf. Hi, on the Eu version of TH-D72e I found the right solution to expand the TX on radio in VHF from 136.000Mhz to 173.993,75Mhz and in UHF from 410.000. Click here to view the article. Created: 21-11-2010 MFJ MFJ-949 Subject: Calibration from MFJ-949-E The mfj-xxx has been calibrated at the factory. IF it should ever need to be recalibrated, then follow this procedure: Equipment needed: Transmi. Click here to view the article. Created: 11-12-2010 MFJ MFJ-1020
Subject: Extending LF Range for MFJ-1020C The MFJ-1020C Active Antenna covers 40MHz down to 300KHz as it stands. However, lifting the earthed end of L6, and putting a 10mH RFC between the now. Click here to view the article. Created: 24-11-2010 Midland/Alan MISC Subject: Midland BASE CAMP 446 power mod JS4 JS17 JS16 SETTING PMR LPD 0 PMR Menu(H) 500mW Menu(L) 10mW / 1 PMR Menu(H) 3W Menu(L) 500mW LPD Menu(H) 3W Menu(L). Click here to view the article. Created: 21-11-2010 Motorola OTHER Subject: Motorola TA228 battery replacemant The 3.6v NiMh Battery pack in the TA288 Talkabout is now getting old. Replacements are either expensive, difficult to find or low capacity due to agei. Click here to view the article. Created: 05-11-2010 Other MISC Subject: Dead Dawia SS-330 power supply. Although not specifically an amateur radio problem, many may use the Dawia SS-330 for Amateur use. My unit failed and upon searching the webb there w. Click here to view the article. Created: 16-11-2010 Other MISC Subject: Extra band for Lafayette Zeus Here is the way to make extra bands available. After the mod turn on the radio while pressing the ASC and FC Band Change is made with the channel 9. Click here to view the article. Created: 13-12-2010 Other MISC Subject: Alpha 10 AM/FM Frequency Conversion 6 Bands with CB Frequencies

With the Power turned OFF, Press and hold the DW and CH 9 Buttons while powering ON the radio. The radio will now work on 6 Bands ranging from 25.615. Click here to view the article. Created: 14-12-2010 Other MISC Subject: Samlex SEC 1223 RFI problem According to marketing and sales the unit is spuriouses at narrow interv. Click here to view the article. Created: 14-12-2010 Other MISC Subject: Installation notes for GE Master II repeaters (LT-4200, TP-163, CSI Tech-nique Bulletin #8 The modifications in this application note provide the following: Modify the ICOM module to allow direct FM modulatio. Click here to view the article. Created: 26-12-2010 Other MISC Subject: CTCSS added to Kyodo KG-105 I worked out and successfully added a CTCSS encoder to Kyodo KG-105 (Grundig FK-105): 16 different tones can directly be chosen by buttons on the f. Click here to view the article. Created: 29-12-2010 Other MISC Subject: Longer life for calibrator valves for Racal RA-17L The Racal RA17 is a great receiver, but with long term use, the 100 kHz calibrator becomes weaker, and soon, totally disfunctional. The reason for th. Click here to view the article. Created: 04-01-2011 Other MISC Subject: 'Silencing' the Diamont GVZ 4000 noiseless , but reality shows something else. For me it was lots of humming
Background: I am not a fan of head phones. So I faced the a few times the situation, that my power supply had a 'stronger signal' noice wise. Click here to view the article. Created: 11-01-2011 Other MISC Subject: Electrophone TX-472d UHF CB from 40 channels to new 80 channels (TOP VIEW)MC145152 PLL IC MB504 PRESCALER Disconnect pin 3 of prescaler IC (MB504) from board. On PLL IC (MC145152), cut pin 4 from g. Click here to view the article. Created: 15-01-2011 Other MISC Subject: Tokyo Hy-power, HL-1.5KFX: Replacing bad incandescent meter bulb with LEDs Replacing incandescent bulb in THP HL-1.5KFX meter, or replacing with LEDs Described here are the steps required to replace the bulb or modify the am. Click here to view the article. Created: 24-01-2011 Other MISC Subject: Modification of Hinztec Anyfrog mk1 for better decoding of Aprs data Add two resistors on each side of C 17, use SMD resistors of 10k (0805 type). Click here to view the article. Created: 28-01-2011 Other MISC Subject: CRT Superstar SS 120 T modification This is how to modify the 4watt 40 channel CB-radio to 10watt and 120 channel. A very simple operation. Here4s the radio inside before any mod. Click here to view the article. Created: 29-01-2011 Other MISC Subject: Expand RX and Tx Band for POLMAR - BD-32 Is possible to extend the bands of Polmar DB-32, here the procedure: Procedure in order to expand band VHF Put OFF the radio. To hold Presse.

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Created: 03-02-2011 Other MISC Subject: MW/LW Antenna through whip for Grundig G3 Open up the radio by removing the screws on the back of the radio. There are 4 on top (NOT the bigger one holding the antenna in), 2 on the bottom, an. Click here to view the article. Created: 11-12-2010 Radio Shack PRO-528 Subject: Communication cable for Radio Shack PRO-528 Communication cable schematic for Radio Shack PRO-582. Click here to view the article. Created: 16-12-2010 Uniden HR2510 Subject: Display Light cover discolors and melts Due to excessive heat build-up the light cover on the inside of the radio will discolor and melt. To fix this you need to take the top cover off of t. Click here to view the article. Created: 07-11-2010 Yaesu FT-840 Subject: Reduce temperature inside the FT-840 In the back of the radio there is a printed circuit board PLACE - UNIT F3392101, bottom of the radio, which gets very hot. We have detected that R221. Click here to view the article. Created: 13-11-2010 Yaesu FT-747 Subject: PA oscillation in FT-747/FT-80C I has noticed too many Yaesu FT-747GX/FT-80C presents this fault. But it is very easy to repair. On the PA output transistors base to colector, there. Click here to view the article.
Created: 13-11-2010 Yaesu FT-840 Subject: Internal heating in the FT-840 In english: Why I decided to replace the heating resistor R2213 from 2W to 5W, this component is on the card next to the Local Unit J2026. If you ha. Click here to view the article. Created: 19-11-2010 Yaesu FT-840 Subject: FT-840 AM Filter simple circuit See how to install this circuit in place of the Crystal Filter YF-112A Yaesu FT-840 thanks to RA3POY PU4ASL Click here to view the article. Created: 23-11-2010 Yaesu VX-5R Subject: Yaesu VX-5R Speaker Audio Distortion Repair The problem: The VX-5R is a very solid radio, but unfortunately has a nasty habit of developing a distorted audio output on the speaker. You probably. Click here to view the article. Created: 02-12-2010 Yaesu FT-90 Subject: FT-90R squelch problemand solution The Infamous FT-90R Squelch Problem and Solution THE PROBLEM: The squelch on 2-meters opens and closes at a fast rate when receiving signals. This. Click here to view the article. Created: 25-12-2010 Yaesu FT-100 Subject: FT-101ZD No transmit I was recently given a FT-101ZD MK1 in good cosmetic condition receiver ok but no tx. I checked the rectifier board PB1968 and decided to replace all. Click here to view the article. Created: 11-01-2011 Yaesu FT-726 Subject: Improve audio quality for FT-726R

Remove 2 mtr module, remove top cover. At the PA end of module, you will find q01, it is a mosfet, 3sk74l2x. Replace this with a BF982. The leads are. Click here to view the article. Created: 11-01-2011 Yaesu VXR-7000 Subject: Expand the frquency for VXR-7000 It is possible to work this repeater a few megahertz outside the frequency band; In command promt, type. ce27b -f when promt password, type: ansho-b. Click here to view the article. Created: 20-01-2011 Yaesu FT-736 Subject: Power Supply audible noise and malfunction during transmit not electrolytic capacitors Hello dear FT-736R users! If your integrated power supply makes an audible noise when like a big hungry bee, especially when the output power is at a. Click here to view the article. Created: 26-01-2011 Yaesu FT-840 Subject: AM filter mods for FT-840 This circuit is a filter for AM, it replaces the crystal filter used in the YF-112A Yaesu FT-840. You can build and install in the same location as t. Click here to view the article.
Revised articles since our last newsletter. Note, sometimes it can be difficult to see the changes since the update can be a little correct in the text, but sometime the update can be a new picture to the existing article. Updated: 11-12-2010 Icom IC-756PRO3 Subject: Enabling the Auto Fan Control on Receive
The cooling fan is started by the PA bias supply and therefore will not operate if left on receive or in transvert mode. Once the rig is set to TX th. Click here to view the article. Regarding your Subscription ! If you do not wish to receive this newsletter any more, then you can unsubscribe from it, by going to http://www.mods.dk and scroll down to the newsletter field. Enter your mail address and click on the removal button. You will then receive a message that confirms you have been unsubscribed. Best regards mods.dk Copyright mods.dk 1996 - 2011