Looking back at 50:10 , I am committing a "Bench Safety NO-NO" , by using both hands on handling ANY connection leads ( outside of meter probes) which is how, long ago, I became acquainted with 600 Volts DC through both arms and my chest. Please avoid using more than one hand when making connections with test clips, using the "One Hand In Your Pocket" procedure, as it will keep you MUCH safer on an energized device.
It's been pointed out to me, that, @ 50:05 , I made a goof when breadboard testing the old NE2 bulb, it did not have connection to the relaxation oscillator circuit, so, that would explain the bulb not getting striking voltage. Changing to a new NE2 bulb in the unit did restore its functionality, so that old one was no bueno anyways. The party that commented, also, suggested that I "put it in the closet and not touch it anymore", I so hate to disappoint them, but I still have unit#2 to work on. 🤣🤣🤣
I edited my reply, as I thought you just had a manual. I would suggest a larger auction site for the sale, possibly hooking up a scope to it and doing a demo video would increase it's potential value as well. IMO, the transistor curve tracer part is functional on the 443, , but not as good as some newer units, BUT, the diode test function is unique for checking reverse breakdown voltage well over 1000 VDC, and has to be treated with care and respect as well. Besides the gain po circuit t being designed and wired inversely to the panel markings, some resistors that drifted out of tolerance, and the NE2 neon bulb needing to be replaced, my factory wired unit was functional as purchased, the second "kit built" unit still awaits my attention, and I'm sure I will sell the factory wired one and keep the kit after I get that one going.
Looking back at 50:10 , I am committing a "Bench Safety NO-NO" , by using both hands on handling ANY connection leads ( outside of meter probes) which is how, long ago, I became acquainted with 600 Volts DC through both arms and my chest. Please avoid using more than one hand when making connections with test clips, using the "One Hand In Your Pocket" procedure, as it will keep you MUCH safer on an energized device.
It's been pointed out to me, that, @ 50:05 , I made a goof when breadboard testing the old NE2 bulb, it did not have connection to the relaxation oscillator circuit, so, that would explain the bulb not getting striking voltage. Changing to a new NE2 bulb in the unit did restore its functionality, so that old one was no bueno anyways. The party that commented, also, suggested that I "put it in the closet and not touch it anymore", I so hate to disappoint them, but I still have unit#2 to work on. 🤣🤣🤣
I have a Eico 443 with Manual that I no longer use and would like to sell. Any suggestions?
I edited my reply, as I thought you just had a manual. I would suggest a larger auction site for the sale, possibly hooking up a scope to it and doing a demo video would increase it's potential value as well. IMO, the transistor curve tracer part is functional on the 443, , but not as good as some newer units, BUT, the diode test function is unique for checking reverse breakdown voltage well over 1000 VDC, and has to be treated with care and respect as well. Besides the gain po circuit t being designed and wired inversely to the panel markings, some resistors that drifted out of tolerance, and the NE2 neon bulb needing to be replaced, my factory wired unit was functional as purchased, the second "kit built" unit still awaits my attention, and I'm sure I will sell the factory wired one and keep the kit after I get that one going.
@@poormanselectronicsbench2021 Thanks. I will have to think about that.