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[dady]

Thanks Multiman

811A circuit as i built it. original Power supply circuit uses mercury vapour rectifiers I considered the Mv rectifiers would make the amp too big.
I used big toriodals and a bridge circuit; Choke input as you need very good regulation as you do with screen drive using EL509's as Zero bias triodes. I think best to use two heater supplies, so you can measure the current draw using two 10 ohm resistors to earth. Very important to have a slow turn on; protects the 6BL7's as the 811's /572b's heat up very fast, compared to the 6BL7's.
You could use sweep tubes instead of 811's, but when i tried them did not like the sound, at least with 811/572's you can use 70 ma current draw. 600 volts is the max with 811A's, less with 811's. 600 volts gives you 100 watts.
i have never tried using Mosfets instead of the 6BL7's as 6Bl7's are cheap and trouble free.
Phil

Is a pushpull, I could't imagine. Best Regards and congratulations.

 

[mihail]

SE 24A (upgrade to 36)+45

 

[TonyTecson]

this is my EL34 parallel singe ended amp....

 

[HiGHFLYiN9s]

DIYTube Clementine

A fresh new DIYTube Clementine build. Puts out about 5 watts per channel.

More details here:
DIY Audio Electronics from Zynsonix.com: DIYTube 6L6 Clementine Single Ended Tube Amp

and see the matching Get Set Go here:
DIY Audio Electronics from Zynsonix.com: DIYTube Get*Set*Go Single Ended Amplifier

 

[rfengineer2013]

re: DIY Tube Clementine

Nice! Very clean, and looks great!

 

[chris73]

Great, simple, clean and realy cute!

 

[tinitus]

hello ,

Here is my 1 er ampli ...

I like your style

 

[mhouston]

Highflying: I keep saying tube amps don't have to be bare ugly chassis. Your amp is beatuful. Well worth the extra effort. Good work.

 

[TonyTecson]

10Y preamp

parallel EL34 single ended triode...with a 10Y preamp...

 

[Steve Cresswell]

Here is my latest creation.

25WPC triode strapped KT120 push pull amplifier.
Input/drivers are Mullard ECC81(12AT7)

There is no phase inverter as the amp accepts only balanced inputs.

An externally hosted image should be here but it was not working when we last tested it.

It was inspired by the Leben CS1000P.

Inside:

An externally hosted image should be here but it was not working when we last tested it.

 

[6L6]

Steve - Brilliant! And a fantastic-looking implementation as well. Bravo!

Can you send me the schematic? I'm building a preamp that will be able to drive it perfectly...

 

[mhouston]

Steve, very neat and very, very nice. Should sound glorious.

 

[overtheairbroadcast]

Steve, that is a very clean build. I especially like how you did the connections in the undercarriage.

 

[mr2racer]

Dynaco Mark VI & AR SP3A

Big ugly brutes but I love them. I listen to them almost every night when the wires are quiet. They now have a 12AT7 input tube and a 12AU7 LTP with KT88 outputs. I just upgraded to EC 100uf film power supply caps. And the old Audio Research with Curcio's mods.

 

[M Gregg]

Just thought,

I would put this in here for posterity

RH84 EF86 driving EL84. The internal photo has the temp fusing for the B+ when on first test. (Now removed and fitted to the back plate.)

Just some photos through the build.
I was going to strip the amp module and try others in the chassis, it looks like its staying..
The EF86 limiting values are just for fun.


http://www.diyaudio.com/forums/tubes-valves/236822-what-do-you-think-op-tx.html

Regards
M. Gregg

 

[jean michel]

hello ,

Here is my ampli proto make with elements of recycling, his audio power makes 2 x 4,5 watts under 8 ohms, its price list is of - of 60 euros entirely, his twin soon goes is made in upgrad version (system stand 19 " and 300 V = HT).

That this will be put back in a casket alu / drink of more impressive size.

 

[Steve Cresswell]

Just thought,

I would put this in here for posterity

RH84 EF86 driving EL84. The internal photo has the temp fusing for the B+ when on first test. (Now removed and fitted to the back plate.)

Just some photos through the build.
I was going to strip the amp module and try others in the chassis, it looks like its staying..
The EF86 limiting values are just for fun.


http://www.diyaudio.com/forums/tubes-valves/236822-what-do-you-think-op-tx.html

Regards
M. Gregg

Love those wooden cases. Fantastic.

 

[pilovis]

My last project

details: http://www.diyaudio.com/forums/tube...dual-mono-tube-headphone-amp.html#post3619867

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

 

[M Gregg]

Love those wooden cases. Fantastic.

. I do like wood, thanks for the interest. Metal chassis seem a bit cold.

Regards
M. Gregg

 

[richwalters]

Greg...a brass escutcheon can liven up a dour monotone chassis..I know it's another thingy to clean but also a reputation... an 'open' amp should sound as good as it's looks.