Built the Tuner and it seems to work well. A couple of questions: 1- Switch has a center OFF position, which connects to nothing. Is this intentional to d/c the antenna? If so, it does not ground both

Definitely! Unfortunately I have no way of doing that from my shack/work shop area. A good filter is next best and at least getting it away from breathing it in directly is better than nothing.

I made very similar one from a 4" muffin fan, and 4" plastic dryer ducting. Fan is on the floor and flexible end can be placed near work area. You could easily attach a charcoal filter if you want, bu

Try qrp-tech groups.io

Thanks for the picture, Karl. I figured out the mods. Just as simple as my mod! But I didn't think of that.

Karl, Do you have the schematic for your mod? Do you need a shorting jack? Dan

There were 2 previous mods. The one used a transistor to lower the keying current. It seemed slightly more complicated but apparently allowed for simultaneous use of an external keyer and the straight

Just finished my Cricket 40. Neat kit, thanks for the design. I made a modification that 4SQRP may be interested in. You have the option of an integral straight key or an external key jack. I wanted b