I put together the NT7S Code Practice Oscillator with a homemade key in Altoids Tins

[G+_Ralph Mills]

Originally shared by Ralph Mills

 

I put together the NT7S Code Practice Oscillator with a homemade key in Altoids Tins. Earbuds stow into the Key tin. I can put the tins back to back for transportation. NT7S CPO is a Twin-T Osc and Buffer Amp using discrete components. Website: http://nt7s.com/2008/11/nt7s-code-practice-oscillator/

[G+_Eddie Foy]

I could learn to send code, copying it not too likely.  I have a tough time with call signs.,