W0BVT's 807 Oscillator Transmitter

The 807 oscillator transmitter used on the PW net this morning is similar to what we built to talk around town in the 1950's...picture and schematic attached.   A couple of turns near the top of the plate portion of the tank coil is coupled to the antenna.

Another two turn coil placed over the grid portion feeds a carbon microphone.  RF energy in the tank circuit provides voltage to the carbon element, and voice information in the RF field modulates the carrier, albeit, at a very low modulation percentage.  The carrier output is near a watt.

W6QMU's Mighty Mo Rig

This is the rig that Doyle, W6QMU has been using on the Peanut Whistle Net.

Click here to see schematics and detailed info about this transmitter.
This is a PDF file.

W0BVT's 12au7 Rig

  One picture is a crude schematic, and the other picture shows the breadboard 12AU7 transmitter.  Audio is from my universal 12AX7 pre-amp and D-104 microphone.  The 6LR6 sweep tube linear amp is pictured to the right.

OZARKCON QRP Conference

http://www.ozarkcon.com/index.php

K0EFJ's QRP Tuner

NG0N's QRP antenna tuner

Here is a small antenna tuner that belongs to Frank, NG0N.  It came from the W0CW estate.

Internet receiver on 3885 AM from the WFØN QTH in Lawrence, KS

Click here to listen to the Flex 3000 receiver on 3885 AM.