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Hi, With the plethora of Ebay kit sources and problems with questionable parts quality from some, can anyone recommend a kit provider that you like? 73 Dave KF5OCP

This is a corrected message.. Disregard my previous... Hi all, After connecting and powering up the 49'r and dds-vfo combo I've discovered a problem... Been checking out an issue with very low audio on my 49'r. I'm feeding it with a signal from my HP8640B and I can hear the signal and tune up and down from center with is about 30hz off right now. Problem I have is it's real low in headphones (tried two sets). I've been double checking components and found that CP2 is real sensitive to hovering my finger nearby. When I do, I get a much higher almost overdriven like audio level with my SG tone and what appears to be a mixing of the SG signal and almost a hum sound. By tuning, I'm able to get the SG tone and higher audio to resonate together.. Not sure what's going on.. Using a Elenco XP-752A for the supply power at 12V even and a couple amps. Not sure where to look.. Mods all went well, everything else from what I can see is in correctly from what I can see.. Just real low audio.. Connecting to an antenna at this point doesn't get me anything.. The signal generator tone gets in but not to the point that it's booming.. Steve NS3L

Hola! This is not directly related to the 49er project but I wanted to ask if anybody in the group is planning to attend Dayton this year ? So far, I'm planning to go Friday and Saturday. Of course I'll bring my 49er VFO project with me. I'll be driving from Florida with some friends (14hrs). Perhaps we can get together and exchange some ideas. 73s Norbert

ALL, I have noticed an almost 2 minute delay from the time power is applied to the Forty 9er until receiver actually operates. I get an audio hiss as soon as power is applied, but the actual receiver does not come on line until the unit "warms up" (almost like old vacuum tube receiver). This is occurring every time I power the unit and, it happens on both of the Forty 9er units I have. Any ideas? Thanks, Dennis WA4GLI

I built a different VFO controlled 40 meter transceiver using a Frog Sounds transceiver, Arduino, si5351 breakout board and an OLED display. I have several posts with details on my blog. DuWayne's Place: "Canned Frog" finished DuWayne's Place: "Canned Frog" finished I had a bit of a delay in getting the Canned Frog finished when my feline helper decided that the little plastic bags of parts for this and some other project... View on kv4qb.blogspot.com Preview by Yahoo DuWayne KV4QB

Hi! How did you find the new tuning constant ? The screen on my 49er reads 7.062.0 versus my frequency counter showing 7.061.8. I'm a bit stuck finding my new tuning constant. The formula shows FOUT =(TW x CLKIN) / 4294967296 TW= (FOUT x 2^32) /125000000 TW = (7061800 x 4294967296) / 125000000 TW = 242641600.4071424 This is were I get lost, 242641600.4071424 = FOUT x 34.359738368 ? I currently have the default 34.35910479585483 as my tuning constant. Any help on how to get my tuning constant or where I can learn more on this subject would be greatly appreciated. Regards Norbert

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 : /My_Tuning_Constant_Calculator.xlsx Uploaded by : wiskey_kilo <wp3dx@...> Description : MsExcel tool for calculating the tuning constant. Input the actual VFO display freq and the desired freq in the yellow boxes. Tuning Constant result shows in the green box at the bottom. Go to the Arduino code and replace the TC value with the new one. **remove Arduino nano from the VFO board before loading the new code. You can access this file at the URL: https://groups.yahoo.com/neo/groups/SoftwareControlledHamRadio/files/My_Tuning_Constant_Calculator.xlsx 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, wiskey_kilo <wp3dx@...>

Anyone else discover that the Forty-9'er is transmitting a "spurious" oscillation, in searching the web I found some comments discussing the issue. It seems that the local oscillator is constantly running. I posted about this but at the time I'm writing this it has not yet posted to the group. Here's the issue I discovered.. When powered on the 49'er alone is transmitting a signal even though it's not keyed.. It's a very low level signal that can easily be heard nearby on other receivers. When the DDS-VFO is connected it tracks up and down as the freq is changed. When keyed my 49'er puts out a good signal over and above the oscillation signal with out an issue. The signal goes away when the unit is powered down. On a side note, I found that although it's receiving and keying OK, I noticed that upon powering ip the DDS-VFO board, only the Nano board shows activity. The DDS AD9850 led's are not lighting in any situation. Can anyone enlighten me on what may be the issue?? Steve Nordahl, NS3L

I know a few manufacturers pump out these 49'ers in China....My instructions showed the value of R2 being anywhere from 220K to 1M. This resistor biases Q1 the FET that feeds the audio amp LM386. They gave me a 220K resistor in the kit so I have that in my 49'er now. Wondered why the big spread in values. So I googled this R2 for the 49'er and got this from KC9ON's web site; R2 is included with 2 resistor values, 1M and 220K to provide bias for Q1. Q1 is used to cut off the receive audio during transmit. With the 1M the radio is fairly quiet sounding, reducing this to 220K increases the sensitivity but seem to quadruple the background noise. I haven't played with R2 yet but it would be interesting to see what changes in the value does for my receive... Anybody play with this yet ???? What value of R2 was included in your kit ??? don KC1AT

I have a general question.. Right now my 49'er with the DDS-VFO is managing 1.65-1.8 watts out as shown on my LP-100A and going into into a tuned doublet. I don't have a heat sink on the D882 at this time. My 49'er and DDS-VFO R1 has been set to 4V P-2-P via my Tek 2213A oscilloscope. I run a Elenco XP-752A Variable power supply. It's set at 12.0V even, and the unit is drawing 0.17a current idling, and a slight tad more on TX. What I'd like to know is what voltage do most users run their 49'ers with the DDS/VFO at? (Assuming 12V levels) I've seen that 49'er output wattage varies from 1.5 to at or above 3 watts based on bit's and pieces I've found on the web. I have the ability to go up to 13.5V but would like to hear from others on what you are actually seeing out of the unit and how the higher V affects the output wattage. Steve NS3L

Would it be possible for the March 49er article to be posted to the Files section in PDF format? I don't get QST, and for me to go to the central library to get and read the issue (if it even there and not migrated to some other part of the Library at the time I go there) is a bit of trial. I am curious to see the article in its entirety so I know what it is all about, particularly from the DDS point point of view- as well as basic radio core function. Hard to know that is really being said without the full details at hand. Also, I am interested, but like some people I am sort of looking for as complete a kit as possible to arrive sometime/where, based upon what I have at least read here and on QRP groups. Mostly because mail to Canada from USA has increased quite a bit, even for small packages, so it will be a major cost to source even a few different mailings of parts/boards (though Mouser and DigiKey might be better sources if relevant since they sort of deal from a Canadian supply outpost I think). Even dealing with supposedly 'free shipping' sources from China via Ebay is way beyond my comfort zone - for a myriad of reasons. tnx Brien VE3VAW

Who has found a good source for enclosures? Any solid color ones with cutout/s for the Display? I'd like to purchase an enclosure for my DDS/VFO 49'er similar to the one in the QST article, but a bit larger so I can add to it..? 1-2 window would be nice.. I'd also like to know where I have to go to get the PCB board standoff's.. Steve NS3L

I've been doing pretty good with my progress do far.. Awaiting a ABS Project case, standoffs, and some other stuff.. Hopefully have something other than a couple pcb's and cables.. I've created an album on Flickr showing close detail, and all the progress photos to date.. I'll add more as I move along.. https://www.flickr.com/photos/92804619@N00/albums/72157668042981502 Enjoy the photos... Steve NS3L

I am posting a string of e-mails (I tried to clarify some parts that I wrote.) with Jack W8TEE that may help if your software is not compiling due to a LiquidCrystal_I2C error. Thanks Jack for the tip! I downloaded NewliquidCrystal_1.3.4.zip, installed as NewliquidCryatal library in the IDE and now the program compiles-now on to building some hardware... My LCD is apparently a version 1, with address lines A0, A1 and A2 on lower right side of the small back pack board, set to address 0x27. After taking out the old LiquidCrystal_I2C library and then adding in its place the NewliquidCrystal library to the program I commented out all the added .h files that were not red and kept those that were red. The program now compiles and appears to work, see attached picture. Bud, K1LC On 05/11/16, Jack Purdum<jjpurdum@...> wrote: Hi Bud: You're not the first person to have problems. The issue is that there are a number of I2C LCD libraries and not all of them work. I use the LCD from Terry King (he was the tech ed on my C book): arduino-info - LCD-Blue-I2C arduino-info - LCD-Blue-I2C He has a number of examples and also where to go to download the proper library. You will have to get rid of any previous I2C LCD libraries that share the same directory name, as it will confuse the compiler. You might also try some of his examples for the 2x16 LCD. Indeed, reading everything he has on that page is worthwhile. Give that a try and let me know... Jack, W8TEE From: "lcolclough@..." <lcolclough@...> To: jjpurdum@... Sent: Wednesday, May 11, 2016 8:23 PM Subject: DDS VFO LiquidCrystal_I2C compiling issue Hi Jack, Thanks for the great article in Mar 2106 QST and book "Arduino Projects for Amateur Radio" Re: the QST article, I am not sure you are the person to ask but if not please point me in the right direction. I am an analog/RF engineer and not too swift on software! I did get past the rotary.h vs Rotary.h problem but have not been able to get the program to compile due to errors associated with the LCD. The Bitbucket.org download site has a number of I2C files and all result in compiling errors such as POSITIVE not declared in this scope or ../wire/wire.h not found. Some files result in many lines of issues. After reading Peter Marks blog I tried his approach of including some non *_I2C files, I2C0.h, I2C0.cpp, LCD.h and LCD.cpp, in the LiquidCrystal_I2C library. Still no luck. I am doing something incorrectly for sure ...any hints would be greatly appreciated. Thanks Bud, K1LC

Hello All, Finally have most of the parts now. I built up the VFO board today. I have a nice clean sine wave from the dds vfo, using an old bk 15Meg scope, little bit flakey, but best I have, and technically I do not know much about scopes. I did adjust the R1 to get a 4vpp oscillator signal. Looking Good. 12V and 5V voltages good. I have the rotary encoder hooked up as well. I hear my oscillator signal on a sony receiver, at 7031, so I need to adjust it a bit. That I saw the calculations and have to go back and do that. I am stuck on one item however, when I push the encoder, I see it change the steps. But when I turn the encoder nothing happens. I expect the frequency to change, but it does not. I think I must have something wrong, but I double checked the schematic. My encoder is hooked as followes; Encoder DDS Board clk yellow pin 22 on schem - says 3 on Board dt yellow pin 18 schem - says 2 on board sw yellow pin 19 on schem - says G on board + yellow pin 17 on schem - says 4 on board gnd yellow pin 20 on schem - says G on board I "assumed" pin 18, 20, 22,and 24 are the pins near the outside of the board and the odd number pins are on the inside, perhaps that is the problem? I have not put any debounce caps on the switch and have not modified the software in any way. I can't seem to find why the frequency won't change. Any help would be Great!! Thanks Bruce N9JCV

Pressed the wrong button. I have not submitted this to QST yet, as we need to complete the board tests. We may experiment with the DDS chip which would extend the range to 6M, but we're not sure the added cost is worth it. Because of limiting the input control to a single encoder and an on/off switch, it's pretty easy to use, but the software been a bitch-kitty. Still, we plan on a similar article and downloads for a manual and the software. If QST doesn't take it, I feel pretty confident we can get it published somewhere. BTW, to all of you who voted for our article, we all really appreciate it and extend our sincere thank you. Jack, W8TEE From: "Jack Purdum jjpurdum@... [SoftwareControlledHamRadio]" To: "SoftwareControlledHamRadio@..." Sent: Sunday, May 15, 2016 12:40 AM Subject: Re: [SoftwareControlledHamRadio] First build progress and questions This has been an enjoyable experience for me and I've had a bunch of people write and say how much they enjoyed the article and building the rig. I love tinkering, especially when I can combine ham radio with software. We just got the Beta boards in for the antenna analyzer (AA). (You can see two pictures on the group site.) If QST agrees, it will be a similar article, but will use a Mega 2560 board...there's just too much software. The AA: covers 10KHz to 30MHz is preset with default bands edges for all bands 160-10M does minimum plots for each scan (usually for a specified band) complete table for each scan large 3.5" full (262,000) color display battery or wall wart power store up to 9000 scans USB download of scan data in CSV (i.e. Excel) format Open Source Arduino code Again, we hope to keep the cost under $50, but the Mega and the larger display may push it to $60. From: "n9jcvphone@... [SoftwareControlledHamRadio]" To: SoftwareControlledHamRadio@... Sent: Sunday, May 15, 2016 12:25 AM Subject: Re: [SoftwareControlledHamRadio] First build progress and questions Thanks Jack, just saw this and figured it myself as well. Again thanks for the GREAT contribution to Ham Radio. I and so many others are gonna have a great time building qrp rigs like this, and I will definitely build more than one lol Bruce

Looking to find out if there's a complete Arduino DSP Filter for CW that I can construct and get all the working files needed? PCB as well? Steve NS3L

Here's a progress shot of my 49'er kit as it stands.. I just got the new abs enclosure. Have the LCD unit installed, DDS/VFO, & 49'er mounted inside, and mounted the encoder also. Using an old National 35mm knob for tuning and will be installing a small 3w audio amplifier and speaker. Still have to do a bnc, power, and other connectors in the back. holes already cut for the usb, headphone, and key jacks. The little audio amplifier will have a volume knob so that will be in the front as well.. I got the case and standoffs from this supplier.. HQ Instrumentation ABS Project Enclosure Box Case, Black, 180x140x60mm, Plastic HQ Instrumentation ABS Project Enclosure Box Cas... US $26.99 New in Business & Industrial, Electrical & Test Equipment, Electrical Supply Equipment View on www.ebay.com Preview by Yahoo More shots as I move along.. Steve NS3L

Looks great!! 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