Simon,

Sorry to hijack this post...

Could you please upload your sketch with the rotary encoder and voltage check?

Thank you!

Mike WA3O

?we might not need super precision i suppose.this normal bourns pot with a knob costs less at 35% around, and shipping is free.

Sarma

vu3zmv

?

@John, I am sure everything is settup correctly. I also tried to press the reset button. Nothing helped.

I did so many Arduino uploads in the past (for my RC models stuff) and never had that problem. Wether my nano died or the drivers I have installed over time do harm each other.

@Rich, no worry. I totally understand, that we should only write in english, so everybody can understand. When I red the german answer to my post, it was some kind of a reflex to answer in german.

And don't mind about the headacke of that Lutheran Gesangsbuch. If it is something like I think it is, it would give me headache too ;-)

Bitx40 raduino, was low output, now no output.? Watt meter gives a quick spike to about .25W, then zero Watts.

Any help is appreciated.

Chuck AC7QN

If you are going to mod the radio, I suggest you order a second one because they are easy to break and a second one provides a reference how to fix the first one.

1. The mod that made the biggest improvement for me was an RF Gain knob.? I added a 10k ohm variable resistor (potentiometer) in series with R16, so I now have an RF Gain control on my radio.? It certainly improves the user experience when listening to high power signals. Remove R16, solder two wires to the pads, connect them to a potentiometer with a 220 ohm resistor in series.? I used a 10k pot, but a 5k or even a 1k would probably also work, I use less than 10% of the turning angle. I can turn down the high power signals and listen to them without damage to my ears, or I can turn down the noise while monitoring a frequency, and turn it back up when I hear something interesting.? The receiver as delivered is seriously loud in headphones, hopefully this will reduce my future hearing aid bills.

2. I did this mod and I believe it helps but I have not heard my signal yet, so can't confirm that:? I paralleled a 22pf capacitor and a 5pf cap in the same method as the vk3ye video. Audio sounds more punchy. It also helps to speak loud with the mike right next to your mouth. I had some faint signal qso's where they couldn't hear me until I very clearly and loudly barked out my call. The power meter jumps higher the louder you speak.

3. I removed c113 but this may not be necessary if you do mod 1, above.

4. I haven't done this yet, but a shuttle tuning mod is in my future.? I only have one working Raduino with another in the mail, but when I get my second one, I will start programming the arduino sketch to do various things.? I have a shuttle tuning sketch written up but not tested yet.? Shuttle tuning is where the frequency does not change with the knob at a center point, but if you move it left or right the frequency goes down or up until you move it back to the center point.? The frequency will move faster the further you turn the knob left or right.

You don't have to do any of these mods, the radio is good out of the box.? But if you like to tweak things, modding can be fun.

开云体育

Hi all,

I have spent a long time trying to get a few of the "A" input features that are included in the raduino sketch working. Unfortunately I am having little success. The Calibration mode works as expected and I can reassign this successfully to any of the other available A inputs (proving that the hardware is working fine), however none of the other features in the code work. That is:

-VFO A/B toggle (A3 double tap to GND)

-VFO Copy (A3 Hold to GND)

-RIT (A3 Tap to GND)

-"TX" display on screen (A6 to GND)

It is driving me nuts. Ashaar commented elsewhere that it was not working possibly?due to buggy timer code. I have edited the timers in many ways but still it doesn't work for me.?

Can anyone here have a look and see why its not working? I am not an Arduino expert but I know enough to be dangerous :). ?

Cheers

?

开云体育

The "wire up" page on the hfsigs webpage still says to ground the brown wire to calibrate. Ashhar, can I suggest that this be corrected.?

Regards

Simon

VK3ELH

Hello,

Is it necessary to isolate the BNC jack if using a metal enclosure?

I am assuming this is OK, but wanted to double check.? I do not have a resonant antenna set up yet.? Would it be OK to listen only on a random length longwire?

Hello, no offense intended, and I hope none was taken. I was simply saying that if you have advice on how to fix something that might benefit the group, it would be great if everyone here could understand it. Myself, I only speak a little German, and only because some of the older members of my family (all of whom are now deceased) spoke it, so I picked up a little bit of it. Can't make heads or tails of my great-grandfather's Lutheran Gesangebuch, though - that fraktur writing gives me a headache if I try to read it too long!

73,

Rich

KC8MWG