"I get no output in the 20 mtr CW band or any other band."
Do you mean you get no CW output on any band, or no SSB output on any band other than 20 meters? If you're not getting any CW output but SSB works fine on other bands, try turning on the VOX in CW mode. Many newer radios require the VOX to be on to transmit CW. With the VOX off, the radio will only send side-tone thru its internal speaker. BTW, tuning to a dead frequency and leaving the VOX off turns the radio into a great code practice oscillator.
As for using a light bulb for a dummy load, DONT DO IT. It may have worked with older tube rigs, but it's definitely not a 50 ohm match. Plus, it isn't a dummy load as it radiates the RF- it's more like a crappy antenna. Back in my novice days, I worked a guy on 40 meter CW who was 3 miles away from me- using a 100 watt light bulb as a "dummy load"! You need to get a real dummy load- a shielded 50 ohm non-inductive load. Heathkit cantennas show up at a lot of hamfests for cheap, but the mineral oil can be messy and weep through the vent plug. Best bet is one of the newer dry type air-cooled loads.
Good luck, de Tom, KA1MDAwww.ka1mda.org