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Hi all. I have just found that my two most recently acquired Chinese Forty-9er kits seem to have a changed value resistor supplied. Both kits are missing the 1M resistor that goes to the gate of Q1 but have a 220K supplied apparently instead. I was wondering if anyone else has come across this in recently supplied Chinese kits? 73 Slim G4IPZ

I thought this might be of interest to the group. I have been using different rotary encoders over the years for diferent projects and perhaps the following info may be of help. I have included a photo of the type I am referring to as "rotary encoder.jpg" in the files section. It is marked with the name 'KEYES' but can be found 'unbranded' on several Chinese sites. To the UK they come in at less than ?4 for 10 of them. The encoder on this pcb requires a 5V supply and will not work simply with reference to the digital input levels on the Arduino pins. The connections needed for it to work are as follows, referring to the print on the encoder pcb and the print on the multiway connector on the project motherboard. CLK --> pin marked 2 on board (yellow section of pins) DT ----> pin marked 3 on board (yellow section of pins) SW ---> pin marked 7 on board (yellow section of pins) + -----)> 5V (any one will do) GND -----> G (any one will do) all the best 73 Slim G4IPZ

Hello all - I'm new here, have read thru LOTS of the threads and found LOTS of good info. I have ordered the parts, 49-er, etc and PCB and parts kit and waiting for delivery. This sure seems like a NICE project to build. my question, has anyone considered adding a CW keyer to the Arduino code? Perhaps having the CW speed to be displayed on LCD? Perhaps this has been done and I didn't find the info - While I've done some Arduino programming and can tweak programs, I'm NOT a true programmer. Thanks to all for having such a GREAT group, and especially to Dr Jack, Farrukh, and Dennis to bringing such a nice project to the world. 73 de Ken H> K9FV

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the SoftwareControlledHamRadio group. File : /rotary encoder.jpg Uploaded by : koyaanisqatsiuk <g4ipz@...> Description : Chinese rotary encoder PCB You can access this file at the URL: https://groups.yahoo.com/neo/groups/SoftwareControlledHamRadio/files/rotary%20encoder.jpg To learn more about file sharing for your group, please visit: https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398 Regards, koyaanisqatsiuk <g4ipz@...>

I may have missed someone already giving this advice, if I have I apologise. Not all the I2C displays out there are pin for pin compatible. Also the I2C address is very important. 50% of the display driver boards and LCDs I have come across use the 0x27 base address as in the original arduino sketch for this project. However the other common I2C LCD display boards I have use address 0x20. Unfortunately simply changing the I2C address to 0x20 instead of 0x27 doesn't make them work. This is because the pins utilised on the PCF9574 I2C control chip to drive the display are different for different driver board manufacturers. I currently am using the 0x27 boards that have a link on one end of the board to disable the backlight and they work perfectly in the sketch If you are using boards from Alioexpress (or other Chinese suppliers) that have 'IICLCD' printed on the board they are 0x20 base address boards and the sketch will need a bit of work in the "LiquidCrystal_I2C lcd () " statement to make them function. This is the line I use for my I2C 0X20 boards from Aliexpress LiquidCrystal_I2C lcd (0x20, 4, 5, 6, 0, 1, 2, 3, 7, NEGATIVE); You may need to change NEGATIVE to POSITIVE depending on how you find the display backlight functions. I hope that may help someone 73 Slim Haines G4IPZ

Has anyone looked into modifying the frequency range of the DDS VFO Kit (QST March 2016)? I have now completed two of the DDS VFO kits and would like to try re-purposing one or both of them for other frequency ranges. One would be for 5.0 to 5.5 MHZ to use in a superhet receiver and another for use as a HF signal generator at 2.0 to 30.0 MHZ. I tried modifying the Arduino sketch to make one of the units to a range of 2 to 30 MHZ but I was only able to get my VFO to tune 7.000 thru 7.999 MHZ. The modification I attempted was to change the upper and lower frequency limits in the VFO Band Edges section and I later tried an additional mod of the section labeled “Setup from EPROM Memory” where I noted that the band edges also seemed to be set to 7.0 thru 7.3 MHZ. Any suggestions would be appreciated. 73's Lee KG5VU

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the SoftwareControlledHamRadio group. File : /RXoffset.ino Uploaded by : lou_w2row <louvoerman@...> Description : ino file that implements receive offset. Hardware mod required. See RX_Offset_mod.pdf in files section You can access this file at the URL: https://groups.yahoo.com/neo/groups/SoftwareControlledHamRadio/files/RXoffset.ino To learn more about file sharing for your group, please visit: https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398 Regards, lou_w2row <louvoerman@...>

Can anybody tell me where I would make a tap on the 49'er keyer section so I could have a front panel indication of the transmit state? I'd like to use a small led. I found one at RS and it would need 12V, however I could find something lower power if needed.. I just need to get an idea where the +/- connections would be for this particular board. Steve NS3L

greetings from the Aloha State.. my name is Peter and my call sign is WH6FAO since there has been a backlog on the connecting board I made my own from the schematic. While it does power up I am having a issue with the display I have posted a short video on youtube showing it https://youtu.be/_w-1xb77E20 .

I would like to trade; 2 1W 36 Zerner Diodes 2 100uh inductors for 2 5.1 1W zener diodes 2 22uh inductors I can send today. Send me an email to n 9 j c v @ mail.com Thanks b

I read the QST article and while it looks like a good project to learn about controlling DDSs with Arduinos, I was not too impressed with the RF part. My plan is to get all the DDS & Arduino & LCD & encoder stuff together and couple it to a homebrew MMR40 radio. While the MMR40 is a little more expensive in parts and more involved construction, it also has more useful features - single signal reception and supports both SSB & CW operation at 5 watts output. The software challenge will be to modify the controller to operate the DDS at ~ 3 MHz for the LO to run the radio. Enhancements could be adding band memories to move quickly from the CW to SSB parts of the band and a digital interface for PSK and/or JT-65 modes. I will be looking at FDIM & Hamvention to see if I can get all the controller parts together. I would really like to find a single source for all the controller stuff. I have most of the radio parts together but will still be looking for some items to complete the list. Here is a link to homebrewing a MMR40: http://kd1jv.qrpradio.com/ARRLHBC/ARRL_MMR40.html http://kd1jv.qrpradio.com/ARRLHBC/ARRL_MMR40.html Building the KD1JV MMR-40 "dead bug" style Introduction: What is the MMR-40? It is a 40 meter rig with SSB (voice) and CW (Morse code) operating modes. View on kd1jv.qrpradio.com Preview by Yahoo 73 - Dave, N4ELM

I’ve uploaded to the pictures section two pictures of the 40Meter CW transceiver I built using the info from the March 2016 QST Magazinearticle. After completing the build asdescribed in the article, I added two more features I felt would enhance the operationof this nice little QRP rig. I added a programmable CW keyer and CW filter. The keyer is the version 2 that was designedby Craig Johnson – AA0ZZ and the CW filter is the Hi-Per-Mite kit from 4SQRPkits. The version 2 keyer is now aretired kit from the 4SQRP group but they do still have a few circuit boardsand IC’s available. They are nowadvertising the version 3 kit and it will work very well in this transceiveralso. Looking at the inside view of the transceiver you will see theVFO section consisting of the AD9850 DDS and Arduino Nano in the upperleft. To the right of that board is the49er kit build exactly as laid out by the guide from the Farrukh Ziawebsite. In the lower left is the keyerboard with three buttons to program buffers. In the lower right is the CW filter which can be switched in orout. It’s nice to be able to switch thefilter out when you tune up into the SSB portions of the band. The small board on the far lower right is avoltage regulating board I built to provide the 9vdc and 5vdc required for thekeyer and CW filter. The transceiver works very well and does a surprisingly goodjob on receive when the band is open, but unfortunately band conditions havebeen poor lately. The transmitter willput out 3.4 watts using a 12vdc battery. This was a fun project and thanks to Jack Purdum – W8TEE,Farrukh Zia – K2ZIA and Dennis Kidder – W6DQ for coming up with thedesign. One other note, use only thefiles from the Farrukh Zia website when building this project. They are up-to-date and complete. I found the ARRL website files not to be thelatest and most accurate. Gary A. – W0MNA

Hi! Regarding the LC Circuit that goes on Y1. The QST in depth document calls out Cx as a 150pF and theinstruction manual from Farrukh's link calls out a 56pF. I was clarified by Jack that the correct value for the LC Circuitis a 56pF. So, when you do the shopping list for the additional parts needed,you'll need a 56pF capacitor and a 22uH inductor. It happened to me that I ordered the 150pF based on the QST andlater realized it was a 56pF, I waited a couple extra weeks for it to arrive. 73s Norbert PS-I have plenty of both, let me know if you need some.

All: I've been wanting to try a new technique for making PCB's but never got around to it until now. The first time heard about it was via a series of YouTube videos by Charles Adams, K7QO. He calls this technique the printed circuit board tutorial: part 02 printed circuit board tutorial: part 02 Simple intro to how I use ExpressPCB to layout waht I call a muppet board. MUPPET - Manhattan, ugly and precise placement experimental techniques View on www.youtube.com Preview by Yahoo Muppet method because it's a mix of Manhattan and Ugly construction techniques. Simply stated, you use ExpressPCB (free download) to create a circuit board. Once that's done, you create a negative, flipped, image of it and send that image to a laser printer using color laser paper. (If you don't have a laser printer, put the images on a thumb drive and go to Staples and have it printed.) Next, he laminates the image to the copper side of a PCB. I found an Instructable that uses Isoproply Alcohol and Acetone to transfer the image to the copper. It takes about 5 minutes to etch a small board. I've posted two pictures of the resulting board; one just after etching and the second with the parts mounted on it. I'm thinking of writing an article on it and will share it if there is interest. Jack Purdum, W8TEE

I have the VFO section working properly and I'd like to add it to a more substantial QRP kit than the Forty-9er. Perhaps the OHR 100A, or a MFJ kit. I wonder if anyone has information about a successful attempt along those lines. It does not have to be the OHR rig...but something along those lines.

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the SoftwareControlledHamRadio group. File : /VfoSourceRev6-1_exp_LCD_5_20_2016.ino Uploaded by : ldcolclough <lcolclough@...> Description : Modification for 1 to 30 MHz output with basic display. You can access this file at the URL: https://groups.yahoo.com/neo/groups/SoftwareControlledHamRadio/files/VfoSourceRev6-1_exp_LCD_5_20_2016.ino To learn more about file sharing for your group, please visit: https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398 Regards, ldcolclough <lcolclough@...>

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the SoftwareControlledHamRadio group. File : /RX_Offset_mod.pdf Uploaded by : lou_w2row <louvoerman@...> Description : Mod to allow the Arduino to control keying of the 49er to implement receive offset. You can access this file at the URL: https://groups.yahoo.com/neo/groups/SoftwareControlledHamRadio/files/RX_Offset_mod.pdf To learn more about file sharing for your group, please visit: https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398 Regards, lou_w2row <louvoerman@...>

I followed the detailed instructions on the 49er board and left the pot out but in one of the pictures I see the pot installed. did something change?

Did you adjust the buck regulator to make sure it was putting out 5V? Jack, W8TEE

Can anyone help me with code please? Ardunio uno. I need to read the band data, display the output on lcd, i.e. 160m and also drive miniature relays on a LPF for the band selected. Got some code sorted but needs more work. Day two now of using code so be gentle Had a bollocking for posting code in wrong place on another forum so hope ok to place it below. Thanks. /* pinMode(bcdInputA0, INPUT); pinMode(bcdInputA1, INPUT); pinMode(bcdInputA2, INPUT); pinMode(bcdInputA3, INPUT); */ for(byte i = 0; i < sizeof(bcdInputs); i++){ pinMode(bcdInputs[i], INPUT); } lcd.begin(16, 2); lcd.print("Hello"); lcd.setCursor(0, 1); lcd.print("sel"); } // end of void setup void loop() { // put your main code here, to run repeatedly: //again in array byte sequence = 0; for(byte i = 0; i < sizeof(bcdInputs); i++){ //shift left by 10 sequence <<= 1; //add the next bcd input, starting at the last counting down sequence |= digitalRead(bcdInputs[sizeof(bcdInputs) - i]); } lcd.setCursor(0,0);//whereever you want if(sequence == 0){ lcd.print("No radio input"); } else if(sequence < sizeof(distancesLookup + 1)){ lcd.print(distancesLookup[sequence - 1]); lcd.print("m"); } else{ lcd.print("Inv"); } } // end of void loop