From: Steve73@... To: n0rc@... Subject: Super Rock Mite pic 1 Date: Monday, February 17, 2003 6:54 PM Hi Rod, I am sending several pictures to you for use on your Rock-Mite files. I made a plexiglass case for it just so I could look at that amazing little rig. I’m up to 34 states, and 3 continents with it so far. The VXO uses a variable capacitor from an old transistor radio. It allows me to venture up about 5 khz and down about 5 khz. Having blown L1 with early experiments with more power, I now use a higher capacity choke for L1 for my RM 20, (Mouser 434-23-4R7). I use a 2N2219 with a heatsink for Q6 now. I have replaced R18 with a 20 ohm trimmer pot so I can adjust power from about 500 mw down to just a few milliwatts. L1, Q6, Y2, and C8 have machined sleeves for easy replacement of components. My RM audio filter is configured so I can switch between the second stage for maximum filtering or I can bypass the filtering entirely. Instead of the 50k volume pot described in the filter directions, I found a 47k resistor in series with a 5k pot gave me all the audio control I needed. There is some howling at the higher volume levels when using the filter. The LM386 provides more than enough audio amplification even when R2 and R3 were replaced with 10k. I added an audio output on the rear for an external DSP filter for when QRM is particularly heavy. I have been dedicated to QRP for a long time, but am now having a ball with this QRPp Rock Mite. What a fantastic little rig. ... 73 Steve Russell, N7SR