Every electrician I knew in the Air Force that worked on planes had been lit up a time or two by some DC current and they ALL stuttered !
How does a tube amp work?
- Thread starter BmWr75
- Start date
I'm an EE. I have been on 120VAC, 480AC and 400VDC, tubed preamp power supply. Since DC has no zero crossing it hits you and keeps it up till you let go.
I whole hardheartedly agree with you. IIRC air planes have 400V dc. I have a couple of friends who were in the Air Force.
read, read ,read one good tech that is a diy is on youtube under SKUNKIE DESIGN ELECTRONICS i have leared alot from her. she is like a teacher a very pleasent teacher...check her videos out.
That's our very own @StepheK .
StepheK's review of the Psvane Horizon CV181-AT (6SN7) convinced me to give them a try- very pleased with them so far.
As someone who really learns well from asking questions, this was great. I took what you wrote and went to chatgpt with questions that I could then distill down to what was confusing me and it really helped make it start to click ... somewhat. Thanks for putting all this together.
You are welcome.
There is a huge amount of tube amp info not covered in this document I've learned since, and I'm not smart enough to even start covering all the amp topologies/circuits that are possible.
I started building tube kits from Bottlehead. From their site I learned some of the modifications that can be made.
My Eros Phono stage is about as tweaked out as it can be. I prefer the USSR military equivalent tubes. They have less distortion than any other tube i have tried. The list of tubs I have tried is very long.
My Eros Phono stage is about as tweaked out as it can be. I prefer the USSR military equivalent tubes. They have less distortion than any other tube i have tried. The list of tubs I have tried is very long.
My first tube amp build was a Bottlehead Crack headphone amp. Great way to learn.
your not alone .
If you know transistor design you will understand tube design. The Cathode resistor sets the bias current and plate resistors bring the voltage into operating range. A transistor works with less than a V across it from Cathode to Emitter. Tubes are higher voltages but the same idea.
I've been consuming @Blueglow's vidoes like a starved man feasting lately. I was watching something on the cathode bias circuit last night and I guess it took root in my subconscious mind. I woke up at 0330 with the "epiphany" that DC and AC current exist in the same amp, flowing in different directions, and for different purposes. Maybe a basic concept to some but I feel like I actually kind of understand this now. At least the big picture and some of the smaller picture. I'll probably be confused again tomorrow but for today, savoring a small victory.. haha
N...n...not me!
I agree. I had a buddy who was an Air Force electrician. He had something in his mouth, probably Solder, and he got across a large capacitor and ended up across the room.
Some of the best Fender amp mods and fixes on the Net.
He also has one of the better DIY fixit sites for tracking Honda S2000s.
See that little tag icon next to the post number (mine is #178) in the top corner of each post? Click that and follow the prompts to save a bookmark. You can go to post #1 or save it wherever you want.
To retrieve it, click on your usename at the top of the page and select "bookmarks".
That worked. Thank you very much. Good to know.