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Hello, I realized this problem of delaying cw during a qso. When I transmit for example the letter "P" the bitx40 sends a letter "G". I noticed that the delay appears from 10 PPM up. I really have to

Looks like you have interchanged the ground and antenna wires! Black is ground everywhere in BITX40. Brown is the center pin of BNC or SO239. Let us know! Good luck Raj

Drill very slowly i.e. don't be in a hurry. Acrylic melts and the bit will grab the sheet and spin it and you could get hurt. I have built many projects with it and even built paddles. I used water to

Do you have to be careful when drilling the acrylic to avoid cracking? Phil, W1PJE

I'm just getting started with my BITX40 kit, without Raduino (at present). First power-up was *incredibly* noisy. with audio seemingly OK. I've since ratted a 1000uF/16V electro cap and 27 ohm (2W?)

Hi, Jerry, very weird is a good description. As you suspected, the rig did not want to transmit with the 10 nf capacitor across the antenna. I moved the capacitor to C1 - added it parallel to C1 - and

This with a proper bezel can give the Bitx40 a great look! https://www.banggood.com/RD-DP-And-DPS-Power-Supply-Housing-2-Kinds-Aluminum-Housing-Constant-Voltage-Current-Casing-p-1146253.html 73 --

I had a low level buzzing sound in my Bitx40 when the volume was at a low level. I disconnected the center brown lead of the volume control and added a 10K resistor from the pot to the wire and

On my analog VFO board #66, I measured across C107 - a level of 500+ mV pp gives full power with the level control R136 midway. With the supplied mic I can't get the power while speaking in a normal

Winner!

What voltage (Vpp) do you look for going into the bitx's mic in?

I had my WA2EBY toroids wound for me by the same guy who does the toroid sets for Elecraft, to Elecraft's approved standards. I am waiting for the rest of the parts to arrive from Mouser, with the

Diz's company, Kits And Parts, is a gold mine for hard-to-find caps and toroids. A friend of mine has one of his One Watters and it's a fun little rig. Keep him in mind when you're building. Jack,

"Yeah, I forgot about Diz. He's good. He also has a toroid kit for the WA2EBY LPF assembly, but not a cap kit as far as I know... john AD5YE" Diz might put together a mica cap kit for the wa2eby

Note that this particular design is for 80 meters. It is tough to make the IRF530 work on 40 or 20 meters, much less at 15 meters or above... Use the IRF510 or equivalent (BUZ21/24/44) instead. john

I'd consider each as a (varying with audio) resistor. At that rate, 3 in parallel would severely drop the available DC 'bias' power, and audio to any or all would be considerably reduced. Phase

If fixing the connections does not help, the only thing to do really is take it out and rewind the coil. There is a lot of information around on how to do that. Watch out especially for sharp edges on

First, flux the connections and re-solder the connections. Put the heat to it, maybe a bad solder joint or enamel was not all off the wire? Just a guess? The only other guess is that somewhere along a

What is the best way to troubleshoot a toroid? My receiver is occasionally dead until I tap #? toroid, then it "jumps" to life. It remains working unless I accidentally hit that toroid again. It has 6

I have a bag of 30, tiny electret mic elements. I am thinking of connecting 3 in parallel electrically to see if It will improve or even work on my Bitx. Not sure how it will affect the input