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Bob: I checked the schematic and the L3 inductor which is a FT37-43 has 11 turns, and L4 which is a T37-2 gets 16 turns. In my 49er kits, the L3 inductor is Green and the L4 inductor is Red. The

Thanks Chuck; I'll keep watching what you are doing!? 73/Karl, KO8S

Glad I could be of assistance Karl. Learned something myself in programming that Arduino for you. At Jack's insistence I upgraded the compiler to V1.6.8 (I think it was .8). For some reason the

I bought 2 kits in the same order with both boards labeled V1.1, but the schematics both say V1.0 dated February 24, 2014. Both schematics specify detail for L3 and L4 in Chinese, but on the Internet

Evidently, we are. I do know that Farrukh just started classes and I know that its a busy time. However, like you said, this has been hanging around for a long time and I'm not qualified to answer it.

I've posted the NE612 data sheet in the attachments section. The pin 6 L.O. input spec is highlighted. The data sheet recommendation for an external LO pin 6 input is 200mVpp to 300mVpp. Indeed, if a

blockquote, div.yahoo_quoted { margin-left: 0 !important; border-left:1px #715FFA solid !important; padding-left:1ex !important; background-color:white !important; } Thanks Bo. I have one in the

Marty, Check out the 'huge' heatsink at Radio Shack and I think you can do anything except continuous key down. Get the kit with the tiny screw if you don't have one. Only the screw or bolt in the kit

One of the guys on the Users Group has an Xcel spreadsheet that figures the constant for you. Look through the early posts. Jack To: "SoftwareControlledHamRadio@..."

Good morning Jack. Thanks for the response. I will add this information to the calibration notes I have. My bench power supply is a 30A supply which has a switch that allows 13.8 V or make it

Mornin' Marty: The buffered output from the VFO was added by Dennis for use with older tube-type (valve-type for our European friends)?transmitters?if they wanted to use it elsewhere. I would just

blockquote, div.yahoo_quoted { margin-left: 0 !important; border-left:1px #715FFA solid !important; padding-left:1ex !important; background-color:white !important; } Thanks Bo 73,Marty WD9GYM Sent

Anxious to find the answer. A recent post said it should be small (forgot value), but I've found that max power output is when it's cranked up max to 4vp-p. On Aug 27, 2016 10:41 PM, "Marty Boroff

Someone very kindly provided step by step instructions for calibrating the 49'er VFO which I followed faithfully when I completed my VFO kit. I lowered the peak to peak voltage as low as I could when

I am in the process of putting parts on the board and noticed that there is an extra resistor on the ver2.1 board next to the C8 capacitor. The board indicates it to be a 1Meg. I have not been able to

To those whose are interested, I have uploaded the keyer mod to the Files section. Detailed instructions can be found in the comments at the beginning of the file. 73s, Chuck WB6GPO

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 : /VfoSourceRev6WithKeyer.ino Uploaded by :

Thanks for your help Marc, I'll take a look and let you know how I get on. 73's Mike G4MFN

Thanks for the info on switching out Q6 (8050) for a 2N3904, Marc. Have done that and Q6 works cooler now. Interesting the 8050 must have been cheaper as the 2n3904 is a very commonly used device.

Just a quick correction, my call is W2ROW not K2ROW. It happens that K2ROW is my XYL but it was I who did the mod :-) As near as I can tell, the original 49er design did have offset built in but that