Jota TRX is a simple ssb(lsb) only, single conversion,40 mtr TRX designed by VU2DEV, OM Ramaprabhu.
It works on 12Volts Battery and outputs a Minimum Power of 15Watts average (30 watts pep) at 13.8 Volts sufficient to contact Soth-India and a few operators have contacted as far as Germany, South Africa etc running only a good Dipole antenna!
The proposed workshop’s main aim is to promote Home Brewing! As such this project is NOT meant for beginners.
Brief Tech Description:
This TRX is a singleconversion ssb rig. (lsb only)
The Local Oscillator (VFO) is a standard 5MHz requirement and hence the IF (Intermediate Frequency) is 12 MHz. So 12-5 = 7 MHz. Hence VFO tunes backward! That means an exact 5 MHz VFO gives 7MHz output whereas 4.9MHz VFO gives 7.1MHz.
The rig is kept simple by having a separate RX and a separate TX with common VFO to give Transceive operation.
Switching is done by a Double pole Relay and frontpanel switch functions as a PTT. The rig is originally meant for Scouts/Guides JOTA (Jamboree on The Air) activity and hence they needed a Send-Receive switch rather than a normal pushbutton switch.
For more details contact
VU3HLX Nakesh R, at nakeshr(at)gmail.com LL- 09895654344
CU 73, de….. VU3PKQ- LL- 9946-987-997