Thursday 2 September 2010

My Old Homebrew 3,0 Mc to 3,8 Mc Final Tube 807's

when I was in high school, I like to assemble a radio transmitter with the electronic tube in 1984 - 1987
The frequency working from 3.0 Mc to 3,8 Mc.I'm loved my homebrew.Now I put the transmitter is no longer, because I do not have enough time, but still I keep it, probably because at that time to assemble, I was forced to work part time to buy a rather expensive components.
I used open dipole 1/2 lambda antenna.Its good working for 1000km distance.

73 88 cherio
YC6CIT/Batara siwa

First model
 Oscillator Tube 6V6 coolpits
 Buffer 6L6
 Final 2 x 807
 with pi section filter antenna system.
Voice DSB
Power 125 watt






My second model

Oscillator 12BY7 with coolpits I put under chasing.
Buffer 6L6
Final 2 x 807 with Coil Induction Antenna
Sometime I change the tube with 6146 RCA.Socket still use 807 but I made socket adapter .
Transformer PT 300, 600V CT




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