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I used a Dremel with a cutting wheel.? Worked perfectly. -- Darren, W9ZIM

I was just thinking about the comment on using the CW TX mode during antenna tuner adjustment and having to limit the key-down time. Previously you had used a 47K series resistor in the circuit to

Jack, Thanks !! Toni, IV3XHM

Charlie K?TAN Lake Havasu City, AZ More a lurker. I have a Raduino, but not a BITX yet.

If the BitX is not connected to an antenna, tuning clicks are very noticeable. When connected to a 40m antenna they,for all practical purposes, disappear. Willy W1LY

Remember to hold the pot shaft end (the part your cutting off) in the vise, NOT the body of the pot. You don't want to put that kind of pressure on the pot. Mike, WA6ISP

So if you have 4 wires how do you put that to a 3 pin male jack? do you share mic and ptt ground wires? Is this gonna work? thank you

I'd certainly fix D7 and C130, could still be the problem. ?But having it suddenly work when a meter is added from gate to ground suggests the 820k at R1 in the FLDIGI PTT circuit is not doing its

That sounds like a good theory. I was aware of the issue with D7 and C130 and thought that might be the problem. It seems like the problem doesn't occur when I have the meter attached. At this point

Follow up: Ok, the 5-2-2017 revised schematic in the wiki makes it clear where to put the agc circuit (instead of just audio in & audio out. "splain it to me like I'm 5 please") Built per the

So will a pneumatic cut-off tool! Vince. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/ http://www.metalworkingfun.com

Cesar, The potentiometer shaft on my Raduino was aluminum and was easy to cut with a hacksaw and shape with a hand file. Of course, be careful to keep metal fragments away from your BITX40. Regards,

It seems there is a huge variability between various BITX40 radios, and there are various points where improvements may help. In my particular case, I achieved the greatest tuning click reduction just

I recently purchased the LCR-T5 test meter (eBay #142169115833) and am very pleased with its results. I build a lot of projects and, when you're two years younger than dirt, reading those cap numbers

A hacksaw will fix that problem.

I already have the 100nF across wiper -ground on both sides of the Tuning Pot connection, as well as the 56ohm and bypass capacitor 1000uF and 100nF in the feed line of the Raduino 5v regulator as

Hello Sarma, I understand that people new to electronics may find it difficult to solder smd components and wind coils, but they have to try to do it. Once they try they will find it easier than they

Have you cut the potentiometer innorder to fit a knob? It is too long and the knob looks odd so far away from the case

Perhaps Philipp could use 100uH in the supply line to the raduino board and place iit close to raduino and add a 470uF and 100nF caps there after inductor towards raduino. It help to filter the noise

It is OK Lawrence Galea for people on the habit of electronics assembly etc. For others, things might appear rather difficult. I saw some designs that specifically mention SDR with no inductors or LC