Gu 50 push pull amplifier design

By Limberpine , November 19, in Talkin' Tubes. Two Monoblock vacuum tube amplifiers. Push pull design using transformer coupling between all stages input, inter-stage, output. Estimated 7 watts per amplifier. Can be modified for more power. Output transformer is a custom design rated at 90 watts.

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Content:

• Any help on my first schematic of a tube transmitter?
• Design and Fabrication of a Push-Pull Electrostatic Actuated Cantilever Waveguide Scanner
• DIY Audio Projects Forum
• A 500W Push-Pull AlGaN/GaN HEMT Amplifier for L-Band High Power Application
• Choosing a power tube for next amp design
• Announcement
• K&K Audio / Lundahl Transformers

WATCH RELATED VIDEO: GU50 Se tube amp

Any help on my first schematic of a tube transmitter?

David, aka Grumpy, needs our help. Great news. David is home! It was quite the ordeal to get him home and into the house, but it is done. Thank you to everyone for their support. Now a long road ahead to get him back on his feet and functioning normally. I have started a GoFundMe to help with the medical bills. Please help, if you can. Discussion in ' Tube Audio ' started by cbox83 , Jan 28, Log in or Sign up.

Choosing a power tube for next amp design Discussion in ' Tube Audio ' started by cbox83 , Jan 28, Hello gents I am about to start a new tube project. I was hoping for some suggestions, as I have a couple issues and was hoping to get some feedback from the experienced.

The project is going to involve a push pull design possibly parallel PP , and will be 4 channels for bi-amp operation. I have a certain footprint that I need to work with, so in as few tubes as possible, I need to have an integrated amplifier with minimum 70wpc RMS.

I have debated cloning the Citation, but I want to do something a bit more original So here is where I was hoping for some feedback from someone thats familiar with hifi and can make a suggestion. I've been digging through sheets all day and I'm coming up dry. Last edited: Jan 28, Messages: 5, Location: Near ST. Louis MO. Use counter sunk tube sockets and 's , why go for an obscure tube.

I don't have the depth to countersink the socket, and I like obscure builds. It encourages me to design rather than google schematics and copy. Messages: 54, Location: Southern NJ. Most of the tubes that will do that are kind of big just to shed the heat that goes along with that kind of output power.

I expect you're going to be looking at TV sweep tubes to have much hope of big power in an unconventional package. The real high power ones are getting pricey though. Many were used in RF amplifiers that beat the snot out of them and the supplies are running low. Messages: 4, Location: Utah. One pair of s or KT88s in push pull would easily do that if you could just get away with the tube height. One tube I'd like to experiment with some day is the EL from JJ --the octal version--it will easily do what you ask, but again, it's probably too tall.

It's mm 4. Maybe a compactron of some sort? I have no experience with them, just that they might be a little more squatty. How tall is the new from Tung Sol? Not widely available yet, but maybe could get you close in wattage?

Probably won't squeeze 70W at V out of them, but maybe 60 watts, if you really push it. Here's another idea: Horizontally mount them somehow, or mount them at an angle. Messages: 5, Location: Middletown,New York. How about something like a GU type tube. Messages: 2, Location: Victoria, B. Messages: Hi, The 6DQ6A or better, the B version , or any of the compactron reincarnations should fit your bill. Also, the Raa required is in the ballpark of what you indicated.

The 6DQ6 has a top cap, so use an insulated cap clip. Cheers Giulio. Giulio Maiocco , Jan 29, Messages: 12, Location: New Jersey. You could run s in PPP but 4 channels a lot of PS you're talking here , regardless which way you go.

Last edited: Jan 29, I can introduce some forced air cooling if necessary. The story of this project is as follows. I found a discarded MCS receiver. I have a pair of Martin Logan Aeon I that I used to use with my Citation, but they proved that the Citation was just no match for their power hunger. The speakers are significant to me, so I want to build an amplifier to run them inside that MCS enclosure and utilize as much of the parts as possible.

The input selector and tone board after stripping the pre will be retained. Amp board, tuner, phono pre's 2 of them, 1 for MC one for MM are being discarded. I have a piece of L aluminum I will be mounting behind the tuner panel, and in that I intend to display all of the preamp tubes behind the glass on the front of the unit.

The preamp circuitry will sit between the L bracket and the pre board underneath leaving the rest of the unit open for transformers and amp.

All unused functions on the front panel will eventually be used to control some features I add on at a later time one I have in mind is arduino driven LED lighting with color changing but there aren't that many left. I want to bi-amp the speakers, 2 70w channels per speaker. Power section is where I'm getting a little stuck.

The front panel has 2 gauges on the front. One I intend to use to display loading, the other I want to use for bias and AC balance with a rotary selector switch like the Citation in place of the tuning knob. My most ambitious project to date. Four 6gt5's or four cheep russian 6L6's would be the most compact and cheapest , the output transformer size and height , a toroid power transformer would be a good choice.

Messages: 3, Location: Spokane, WA. GU's are interesting. Would be even better if I could find the Telefunken branded ones a bit more easily! Anyone ever listened to an amp with these? How do they sound? I just a couple of quads recently so can't tell you much yet. There's a good thread about them. Wavebourn apparently has a lot of experience with them. I am now steering towards the 6KN6 sweep tube for this duty. I could VERY easily overshoot my power goals with this tube.

Have you decided on an output transformer which i see a the biggest obstacle with your self imposed size limitations. The 6KN6 is an interesting choice, but it needs a pin socket, and 3A of filament power! Just backtracking a bit, what's wrong with the ? You can easily get 70W per pair with an off-the-shelf OPT. You must log in or sign up to reply here. Show Ignored Content. Share This Page Tweet. Your name or email address: Do you already have an account? No, create an account now.

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Design and Fabrication of a Push-Pull Electrostatic Actuated Cantilever Waveguide Scanner

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DIY Audio Projects Forum

Welcome, Guest. Please login or register. Home Help Search Login Register. Pages: 1 [ 2 ] Go Down. Quote from: drgonzonm on April 15, , pm. Build problems? Read this first.

A 500W Push-Pull AlGaN/GaN HEMT Amplifier for L-Band High Power Application

Need support, you got it. Or share youe ideas and experiences. Posts: 28 Location: Guernsey Joined: January 6, Francois Robichaud Audiophile. Tubelcain Audiophile.

Choosing a power tube for next amp design

Try out PMC Labs and tell us what you think. Learn More. The paper presents a novel fully integrated MEMS-based non-resonating operated 2D mechanical scanning system using a 1D push-pull actuator. Details of the design, fabrication and tests performed are presented. We have successfully demonstrated a 2D scanning motion using non- resonating operation with Hz in vertical direction and 20 Hz in horizontal direction. This non-resonating scanner system has achieved a field of view FOV of 0.

Announcement

David, aka Grumpy, needs our help. Great news. David is home! It was quite the ordeal to get him home and into the house, but it is done. Thank you to everyone for their support. Now a long road ahead to get him back on his feet and functioning normally.

K&K Audio / Lundahl Transformers

This calculator allows you to trace the anode characteristics graph, and to compute and tune loadline and operating point of various vacuum tubes. Did you buy my book? Remember to leave a review on amazon! The underlying model and equations, for tracing anode characteristics curves, are those discussed by Norman Koren, in his web site.

The tube square power amplifier is assembled on 4 GU lamps. It is connected in parallel according to the scheme with common grids, and is designed to operate in the ranges of 80, 40, 30, 20, 15, and 10 m. If the amplifier is installed according to the requirements for such devices, it is not necessary to neutralize the lamp passage capacity. The maximum output power of the amplifier is - W.

GU50 Push-Pull version1. Now I am developing PP version. This is very first schematic. What do you think? I got a good frequency response from Hz up and about -3dB at 40Hz. Find More Posts by matejsirk. It is SE actually since the bottom driver tube is backward-powered.

Post by pre65 » Mon Sep 19, am. Post by andrew Ivimey » Mon Sep 19, am. Post by Nick » Mon Sep 19, am. Post by Nick » Mon Sep 19, pm.