"UH, another "big kid" on the playground?"
Yup. I did manage to graduate from the sandbox at least. Now it's vacuous play with tubes.
"I'm surprised that it's on there..."
I guess they are too big for drivers, and too small for outputs. There was a thread a couple of years ago where someone was proposing to use a bunch of similar minded tubes in parallel for outputs. Never heard any more on it. There were questions as to whether the grid could take a positive peak occasionally. Probably a protection diode would save the day. At $1 a pop, could be worth a try. Sort of a make your own 8417. I'm guessing they are good for 50 mA max DC each, 150 mA peak, its not listed on the datasheet. (well, I guess they didn't expect some "audio idiots" to abuse them) Could maybe use the 6JC6 for input/drivers, help balance the Yin and Yang factors.
Yup. I did manage to graduate from the sandbox at least. Now it's vacuous play with tubes.
"I'm surprised that it's on there..."
I guess they are too big for drivers, and too small for outputs. There was a thread a couple of years ago where someone was proposing to use a bunch of similar minded tubes in parallel for outputs. Never heard any more on it. There were questions as to whether the grid could take a positive peak occasionally. Probably a protection diode would save the day. At $1 a pop, could be worth a try. Sort of a make your own 8417. I'm guessing they are good for 50 mA max DC each, 150 mA peak, its not listed on the datasheet. (well, I guess they didn't expect some "audio idiots" to abuse them) Could maybe use the 6JC6 for input/drivers, help balance the Yin and Yang factors.
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I also had to increase all sizes of pads, since the original libraries in Kicad, I was using during my previous job, were very small. The result is that when I asked for an outside company to do my PCBs, I had to pass all my custom library, since they was unable to open my PCB. No problem, the kicad is open source ...
And when the new employee (which came into my place) was to use the kicad found strange all those large pads. As he had no practical experience, they thought this were desnecessary, and so he have destroyed some PCBs in an attempt to use the original pads! Apparently nobody teach anything practical in technical schools nowadays ...
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No, "this body will be donated to science and its internal organs will be properly studied"! 😛😀 .
All in name of science, oops, fun!
Wow tubelab is having a bad week! I guess I jinxed you in your PCB making skillz 😉 SORRY 🙁 And on top of that you are fixing cars AND moving furniture for probably free. You sir, are a classy guy and I am sure the folks around you surly appreciate you, I know us forum members do.
And that poor kid! It sounds like he broke his arm BAD. I remember I broke a bone in grade school and everyone signed my cast, hopefully he will get some attention from some of his female classmates, chicks dig scars right? Lets just hope it doesn't come to affect his mobility in his future, especially if he is into sports.
I might call Edcor and see if they can estimate how long it will take. A fellow member seemed to get his transformers in two weeks! I still might not want to wait, also I would like to try the Transcendar brand this time around. I was soooooo close to hitting the buy button last night. My friend offered me $700 for my HH Scott 299A, this will help fund my new amps and get them done a lot quicker. I just hate to see that amp go, I really like it. At least it's going to a friend I guess :/
And that poor kid! It sounds like he broke his arm BAD. I remember I broke a bone in grade school and everyone signed my cast, hopefully he will get some attention from some of his female classmates, chicks dig scars right? Lets just hope it doesn't come to affect his mobility in his future, especially if he is into sports.
I might call Edcor and see if they can estimate how long it will take. A fellow member seemed to get his transformers in two weeks! I still might not want to wait, also I would like to try the Transcendar brand this time around. I was soooooo close to hitting the buy button last night. My friend offered me $700 for my HH Scott 299A, this will help fund my new amps and get them done a lot quicker. I just hate to see that amp go, I really like it. At least it's going to a friend I guess :/
If you figure it out please PM me........I am sick of looking through datasheets
I will do the same.
Aye--Now we have the clues and know what they are--All becomes clear! haha...
Must be the time for bad weeks--I just found I got Rats.....
Must be the time for bad weeks--I just found I got Rats.....
Me too please. I'm at work, but I'm curious, and would like to see what it is later when I get home. Thanks all,
jeff
jeff
I think everyone is PM'd so far.
Here are the triode curves for the tube from Hell:
Pic1:
10 mA/ div Vert.
50 V/div Horiz.
1 V grid steps
You can throw out those 300B's now.
Some comparisons:
Pic2 is a 36MC6 in triode (selected)
Pic3 is a 26LX6 in triode
Pic4 is the "perfect triode"
Here are the triode curves for the tube from Hell:
Pic1:
10 mA/ div Vert.
50 V/div Horiz.
1 V grid steps
You can throw out those 300B's now.
Some comparisons:
Pic2 is a 36MC6 in triode (selected)
Pic3 is a 26LX6 in triode
Pic4 is the "perfect triode"
Attachments
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Mu looks like around 31
Rp looks like around 1000 Ohms at 40 mA
From Mu = gm x Rp
gm = Mu/Rp = 31000 uMhos at 40 mA
On my datasheet here, I see Mu = 28.5 at 20 mA, and Mu = 31 at 40 mA
Thats measured off the datasheet curves.
Rp looks like around 1000 Ohms at 40 mA
From Mu = gm x Rp
gm = Mu/Rp = 31000 uMhos at 40 mA
On my datasheet here, I see Mu = 28.5 at 20 mA, and Mu = 31 at 40 mA
Thats measured off the datasheet curves.
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What was it that folks called a one-tube one-Watt amplifier? (besides QRP - that was the old days).
Much thanks,
Chris
Much thanks,
Chris
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