Post by thetragichero on May 27, 2020 2:11:04 GMT -5
man the old times were nuts! they actually sold amps that plugged straight into the wall with no power transformer. so with a two prong plug you have a 50% chance of the mains voltage connected directly to the chassis ground, which is connected to the input jack sleeve, the guitar's bridge, the strings, and YOU
obviously I'm not going to make something that dangerous but i found a use for a 50-0-50 transformer pulled from a solid state organ!
using a solid state bridge rectifier instead of the 35w4 half wave rectifier (will need to do some figuring wrt voltage dropping resistor for the series heaters since they'll be run off the B+). i have a 50L6 output tube on the way. using some oddball tubes for preamp: 6sj7 and 6ba6. signal will go into the input jack, split in parallel into both tubes, and then will be blended with a 500kMN pot before volume and then output tube and single ended transformer. gonna use two 8" speakers.
the chassis was one of the vibrato units from a Hammond tube organ. other side and the control panel top have had waterslide decals and poly sprayed on them so they're drying. power transformer will be screwed to the cabinet instead of the chassis because while but huge i don't trust the thin sheet metal
obviously I'm not going to make something that dangerous but i found a use for a 50-0-50 transformer pulled from a solid state organ!
using a solid state bridge rectifier instead of the 35w4 half wave rectifier (will need to do some figuring wrt voltage dropping resistor for the series heaters since they'll be run off the B+). i have a 50L6 output tube on the way. using some oddball tubes for preamp: 6sj7 and 6ba6. signal will go into the input jack, split in parallel into both tubes, and then will be blended with a 500kMN pot before volume and then output tube and single ended transformer. gonna use two 8" speakers.
the chassis was one of the vibrato units from a Hammond tube organ. other side and the control panel top have had waterslide decals and poly sprayed on them so they're drying. power transformer will be screwed to the cabinet instead of the chassis because while but huge i don't trust the thin sheet metal
