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Hi Karl The solution could be that you haven?t adjusted the display contrast! On the backside of the display, there is a small (blue?) potentiometer. You have to adjust this, when you see the 16

First, make sure you have the latest version of the Forty-9er software from Farrukh's site: ?www.farrukhzia.com/k2zia? Second, there are non-standard libraries that must be installed in the

Nathan: Are you getting any signal from the DDS? Do you have access to a scope? Frank Moskal

Gentlemen: With the hardware all connected, I powered up the Arduino from my computers USB port, and the LED on both the Arduino and DDS board lit up as well as the blank (16 square segments only)

ok I have built my radio kit and the dds vfo and when I power it up everything looks good. I can get the display to change the frequency and when I key it make a nice sound a bit loud but nice sound.

There seems to be problems with the encoder switch connection. I am puzzled by this because the schematic clearly shows the encoder connected to D4 on the Nano. The problem is that people don't seem

So I decided to check the actual current draw to be sure I had a decent choice. I prepared a 50 ohm resistive load for the antenna, plugged in my ear buds and set the supply voltage to 12.0 volts with

It worked beautifully. Thanks. However to get rotary push switch to work, had to change from pin7 to pin 4.... Now everything works. Tnx agn... KJ4ZI

I asked the same question when I was coding the warning system. As always in amateur radio, it depends. My SLA batteries fully charged give me 12.7v. Setting the lower limits to 11.7 and 11.5 would

My thought is that 13.5VDC is perfect for 2-3w output Brian. And to go easy on Q5, What is the output at 13.5V? And did yo use a heat sink? Although the D882 transistor could be pushed further in PCM

Add-addendum: ...of course the DDS takes its share of power too...

Addendum: the 49er RCVR draws ~115mA, so minus the total Xmit current would be 860mA - 115mA or ...? ;)

I decided to check the current draw of my 49er in the Xmit position. With a steady 3 watt out and key down, current drain from my old Heath DC bench supply was 860mA. Conditions: Power out: 3w Vcc:

I thought about how to power the transceiver and found a nice solution that probably others have seen but perhaps not pointed out. There is a cable for sale on eBay that contains the electronics to go

So I guess this begs the question... What voltage is the right voltage??? I am currently powering my radio with a 2 cell 3000mAH 7.4V LiPo battery using a voltage up-converter. So I can set the

2.5 Ohm Resistor Stablizes Q5 Final... Noting D882's emitter is tied directly to ground, I thought it might ease Q5's burden to add a small power sharing/stabilizing resistor in the emitter leg. I cut

The latest version of the voltmeter implementation has been uploaded. Added feature is cautions and warnings when the input voltage exceeds certain triggers. You can edit those triggers by changing

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 : /vfo-source-rev6-volt-alert.ino Uploaded by

That is because the 49er has a direct conversion RX...both side bands are received equally. You need to determine which side is the correct one to listen to, based on the direction of the TX offset.

I have an article in QRP Quarterly about varying the tuning rate according to how fast you are turning the encoder. I have mine defaulted to 100Hz but when you turn it fast, the rate is 5 KHz. Give it