Search found 8993 matches
- Sun Mar 25, 2012 9:58 am
- Forum: Assorted Stuff
- Topic: Nothing In Particular
- Replies: 16489
- Views: 4855983
- Sun Mar 25, 2012 9:54 am
- Forum: Everyones Projects
- Topic: 6em7 as driver schematics
- Replies: 266
- Views: 61156
Well only in the sense that you just bang a resistor in, but a ccs you have to breadboard to find the necessary current seting resistor, and you have to consider dissipation you have to install a 3 legged device (or better two 3 leged devices) and gate stoppers and curent set resistor. Only in that ...
- Sun Mar 25, 2012 9:41 am
- Forum: Everyones Projects
- Topic: 6em7 as driver schematics
- Replies: 266
- Views: 61156
Going back to the 6em7. The struggle with this valve is always the operation of the VA which is section 1. With a high mu valve what we always require which we can't have is more B+ so that we can have more resistance as a load, which gives it more linearity and more voltage gain. this is where, in ...
- Sun Mar 25, 2012 8:32 am
- Forum: Everyones Projects
- Topic: Single - Ended 813
- Replies: 69
- Views: 25156
- Sat Mar 24, 2012 8:47 pm
- Forum: Everyones Projects
- Topic: 6em7 as driver schematics
- Replies: 266
- Views: 61156
- Sat Mar 24, 2012 8:36 pm
- Forum: Everyones Projects
- Topic: Single - Ended 813
- Replies: 69
- Views: 25156
That lot sounds interesting Paul and much food for thought :) Well take from it the idea of connecting g3 with g2 to the plate. OK - after much calculating and burning the midnight oil, I have come up with the following set of shunt-regulated power supplies for the project........................ ....
- Sat Mar 24, 2012 4:55 pm
- Forum: Assorted Stuff
- Topic: Nothing In Particular
- Replies: 16489
- Views: 4855983
- Sat Mar 24, 2012 4:29 pm
- Forum: Everyones Projects
- Topic: Single - Ended 813
- Replies: 69
- Views: 25156
Now then our Steve. You have a true Pentode here with no internal connections, so you can try a few different things. Normally when we use a beam tube as a triode we don't get the choice because the beam plates are internally tied to the cathode. But the correct way to triode operate a true pentode ...
- Sat Mar 24, 2012 3:44 pm
- Forum: Everyones Projects
- Topic: 6em7 as driver schematics
- Replies: 266
- Views: 61156
Mike, was this in Tetrode mode or triode? Have you tried that Alexander kitick type eedback [are we calling it Schade or something?]? http://i194.photobucket.com/albums/z10/v1505guy/se807_sch_2.gif I ask because on my 6v6 Beam Tetrode I have added a 320k pot and a 100k resistor. the resistor makes s...
- Sat Mar 24, 2012 3:30 pm
- Forum: Everyones Projects
- Topic: 6em7 as driver schematics
- Replies: 266
- Views: 61156
- Fri Mar 23, 2012 3:58 am
- Forum: Everyones Projects
- Topic: 6em7 as driver schematics
- Replies: 266
- Views: 61156
- Thu Mar 22, 2012 9:19 pm
- Forum: Everyones Projects
- Topic: 6em7 as driver schematics
- Replies: 266
- Views: 61156
Looks like the one you have on order. The other one is too high. Only way I can see to use it would be with the 5u4 choke input but with a small first cap somewhere around 2uF to tweak up the voltage, again this type of thing you adjust on test by paralleling small value polyprop's until the desired...
- Thu Mar 22, 2012 8:46 pm
- Forum: Everyones Projects
- Topic: 6em7 as driver schematics
- Replies: 266
- Views: 61156
- Thu Mar 22, 2012 8:31 am
- Forum: Everyones Projects
- Topic: 6em7 as driver schematics
- Replies: 266
- Views: 61156
If you use one of the chokes for the output stage and a 5r4gy rectifier you will end up with about 370v B+ I have assumed a 100 ohm dc resistance for the chokes. Then you have a loss across the OPT typically 5v. Talking triode mode, your cathode bias with our rough guessed supply voltages we'd proba...
- Wed Mar 21, 2012 9:33 pm
- Forum: Everyones Projects
- Topic: Single - Ended 813
- Replies: 69
- Views: 25156