Month: August 2006

RF-Condenser microphone circuit

RF-Condenser microphone circuit

Here’s how to make a RF-Condenser microphone circuit that’s similar to a Sennheiser MKH series mic, Uwe writes – “This RF-circuit is operating at 7.68 MHz and 48 V phantom power supplied. It is tested with a large diaphragm cardioid capsule from Ralf Falk, who himself is designing a LF tube microphone and with a […]

DIY Telescope Makers Gathering

DIY Telescope Makers Gathering

Photos are starting to trickle in from Stellafane, a yearly DIY telescope event. Here is Sean Graham’s Photoset of the event. You can take classes to learn how to grind your own mirror! We are The Springfield Telescope Makers, Inc., an active Amateur Astronomy and Telescope Making club located in Springfield, Vermont. We put on […]