Hi to you all! I wanted to say that there is an schematic in your schematics section that is no good! It is the schematic called: Powerful AM radio transmitters (1 Watt+) Tis schematic works very good IF you make it good!!! The powersuply(+13,8V) must go to the other site of the transformer modulation transformer! The 13,8V must go direct to the oscillator and the buffer. Also the 10mF(uF) Electrolytic must go to the otter sit of the transformer, On the oscillator and buffer together with 100nF to ground. Also I wanted to say the 2 RFCs are very important because RFC no good you get LOOW or NO POWER!!! Experimental: The buffer 2N2222 you can try to switch for 2N2219A or 2N3866 and maybe trye to make the Emiter R from 100 oHm lower 50 oHm 2X 100 oHm parallel. Modulation Use a old amplifier 25…30Watts to modulate the transmitter. The Modulation transformer I used was a 220 to 2 times 35V 1Amp I don’t use the 220 coil! 1X 35V coil is for the transmitter and 1X 35 coil is for the music modulation in. You connect there your old amplifier. My schematic is a little different and gives plus minus 8Watts. Standard schematic: members.multimania.nl/radiorob007/images/schema/kg/kgmetfet.JPG My schematic: members.multimania.nl/radiorob007/images/schema/kg/grenade.JPG TIPs: play with the capacitors 470pF 001 mF and the filter coil! (use A variable capacitor 500…1000pF!) (the coil form…. I think 22MM diameter???)do not know for shore??? I used A T-50-2 ring core! my antenna is an (dipool) inverted V 2X 11…12 meter coax 50 oHm I think you can use also 75 oHm coax. My transmissions goose over the half world I hope my writhing was ok because I am coming from the Netherlands. Success with the schematics and maybe we make an QSO on ShortWave? The pirates here are on 6200/6500kHz – AM mode every Sunday around the mid of the day!
No comments hello is anybody here? the schematic is still not changed! i46.tinypic.com/2zpk3yh.jpg it would be A shame if the error not get removed from the schematic someone? E-mail: radiorob007 for the good schematic.
Hi to you all! I wanted to say that there is an schematic in your schematics section that is no good! It is the schematic called: Powerful AM radio transmitters (1 Watt+) Tis schematic works very good IF you make it good!!!
Updated the schematics section with your version of the transmitter. Thanks for the circuit update. When I get the spare time I plan on adding a lot more schematics but until then anyone is welcome to post schematics in that thread.