JUMA TX136 136 kHz Transmitter 2009

JUMA TX500 500 kHz Transmitter 2009
MOHAIR ONE miniature 3.5 MHz transceiver 2009
JUMA PA100 100 W Linear Amplifier 2008
JUMA TRX2 High performance CW/SSB Transceiver 2007 

JUMA TRX1 DDS controlled CW/DSB Transceiver 2006
JUMA KEYER1 Miniature CW keyer 2006
High performance SSB filter for Direct Conversion RX 2006
Simple CW keyer 2005 

JUMA TX1 DDS controlled CW transmitter 2005
Active ferrite rod antenna for HF 2005
JUMA RX1 Direct Conversion Receiver 2005
Five cent CW key 2005

Twin lead telephone line "killu" RF characteristics 2005
Direct Conversion HF Transceiver with DDS LO 2004
50 ohm to 200 ohm HF wide band low level transformers 2004
Wilkinson splitter for RX measurements 2004

Windom baluns 2001/2004
Ferrite rod antenna for 80 meter 2004
Magnetic Loop Antenna for 80 m 2004
Mascot Switched PSU 9320 modification to 8A peak current 2004

150W MOSFET linear amplifier for 80m 1996
Power supply 13.8V 20A schematics (gif) 1996
80 m HF SSB/CW Transceiver 1988
PLL VFO 5.5MHz…6.0MHz for TS130S 1988