Nice old testers. There was an art to using these back in the day. My Peak tester is just hook it up any old way and it gives all of the information. Computers are great but it doesn't give one the knowledge of what's really going on. There is nothing better then hands on learning. Thanks for the video.
@@OldSchoolElectronics I use mine mainly to match gain on new transistors. They do show opens, short, leakage and which lead is what. But it works on a very small 12 volt battery so are limited .
Fantastic explanation, great to know what some of the settings do! I have been trolling for this device since I first seen it on your channel, they are not cheap! Great to have another video from you OS! ~Jack, VEG
Thanks, sir, Jack, VEG! I'm back! The ICEO test function (which was the focus of this video) can probably still be found on other vintage testers as well. The prices nowadays of these Leaders are outrageous.
I always wonder about those Vbeo etc acronym. I understand a bit now. Thank you for touching the subject. I'm also taking my watching you older videos. I saw you have a Hameg. Very nice looking scope.
Thanks! I was going to do a bigger write-up to accompany the video, but I was too lazy. In this video I just checked the ICEO. In my case, I measured the ICEO leakage between the collector and emitter, with the base open. The capital "O" stands for open. And as I mentioned, some testers had ICBO, which was between collector and base, with the emitter open. This leakage current is smaller than the ICEO. My tester measures DC beta (hfe or gain), which is the ratio of collector current to base current (to put it simply--collector current divided by base current), with the collector voltage held constant. Base current is much smaller than collector current. And in general, as I mentioned, power transistors will have more leakage and smaller gain, while small (signal) transistors will usually have less leakage and higher gain.
Nice old testers. There was an art to using these back in the day. My Peak tester is just hook it up any old way and it gives all of the information. Computers are great but it doesn't give one the knowledge of what's really going on. There is nothing better then hands on learning. Thanks for the video.
Thanks, Pat. I use my old tester quite often. I will have to check out these newer Peak testers.
@@OldSchoolElectronics I use mine mainly to match gain on new transistors. They do show opens, short, leakage and which lead is what. But it works on a very small 12 volt battery so are limited .
Ok, I see. Gain Matching! Maybe get yourself a curve tracer, too?
Fantastic explanation, great to know what some of the settings do! I have been trolling for this device since I first seen it on your channel, they are not cheap! Great to have another video from you OS! ~Jack, VEG
Thanks, sir, Jack, VEG! I'm back! The ICEO test function (which was the focus of this video) can probably still be found on other vintage testers as well. The prices nowadays of these Leaders are outrageous.
I always wonder about those Vbeo etc acronym. I understand a bit now. Thank you for touching the subject. I'm also taking my watching you older videos. I saw you have a Hameg. Very nice looking scope.
Thanks! I was going to do a bigger write-up to accompany the video, but I was too lazy.
In this video I just checked the ICEO. In my case, I measured the ICEO leakage between the collector and emitter, with the base open. The capital "O" stands for open. And as I mentioned, some testers had ICBO, which was between collector and base, with the emitter open. This leakage current is smaller than the ICEO. My tester measures DC beta (hfe or gain), which is the ratio of collector current to base current (to put it simply--collector current divided by base current), with the collector voltage held constant. Base current is much smaller than collector current. And in general, as I mentioned, power transistors will have more leakage and smaller gain, while small (signal) transistors will usually have less leakage and higher gain.
What is the test voltage in ICEO