| Electronics > Projects, Designs, and Technical Stuff |
| It looks for me as stupid schematic (Oldtimers welcome!) |
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| schmitt trigger:
It would be at Vin's valley voltage, plus some saturation plate saturation voltage. However, if Vin is very well filtered thanks to a Pi-filter, the valley voltage should be very close to the average voltage. As I mentioned previously, this is a project that I've wanted to build for 45 years...... I might give it a try. |
| T3sl4co1l:
Yes, it would be saturated high and not regulating. Somewhat less than Vin, it will be in regulation, at least up to some current. The dropout voltage varies with load, of course. Tim |
| 001:
Thanx The strange thing about tube regulators is tetrode mode. Why 6L6 is used as tetrode if anode voltage (Anode to Catode) may be LOWER than second screen voltage (2nd screen to catode)? Triode mode benefit is lower Ri, isn`t it? |
| Yansi:
Did you read the article I have posted, didn't you? |
| 001:
--- Quote from: Yansi on October 12, 2019, 09:37:50 am ---Did you read the article I have posted, didn't you? --- End quote --- Yours link is about common transistor line regulators, not teterodes, isn`t it? So I read this. But why heathkit use 6l6 as tetrode? --- Quote ---It is a given among engineers that when the pass tubes are connected as pentodes the regulation is better than when they are connected as triodes. However, my initial attempts to prove this by the numbers taken from the curves met with failure. I tried comparing the gain of the pass tubes as a cathode follower which yielded only a small percent difference. Same went for the transconductance, 5 millimhos for the triode and 6 for the pentode. I did not use tube manual numbers but picked values from the graphs as close as possible to the actual operating point. --- End quote --- |
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