How may watts is it meant to produce? Try some boxes with Fostex 8" drivers for real effecience.
Dear Tony,
excellent design! I particularly fancy the tube amortisation mechanism, can you please give some info concerning materials-techniques used or source to supply these? Are these effective in tamming vibrations from chassis to tubes?
Materials
Hello Panos29
the damping element is an piece of rubber with two M3 srews on both sides.This is fixed between 2 cubes.This is an very effective suspension for microphonic DHT tubes. Both 801 and 26 works perfect.
https://www.buerklin.com/default.asp?event=ShowArtikel(17H912)&l=d&jump=ArtNr_17H912&ajaxLoad=true
PB Fastener Gewindepuffer 110004 Außen-/Außengewinde Schwarz im Conrad Online Shop
you can source this elements also from DIYaudio member Vinylsavor. Be free to contact him.
Hello Panos29
the damping element is an piece of rubber with two M3 srews on both sides.This is fixed between 2 cubes.This is an very effective suspension for microphonic DHT tubes. Both 801 and 26 works perfect.
https://www.buerklin.com/default.asp?event=ShowArtikel(17H912)&l=d&jump=ArtNr_17H912&ajaxLoad=true
PB Fastener Gewindepuffer 110004 Außen-/Außengewinde Schwarz im Conrad Online Shop
you can source this elements also from DIYaudio member Vinylsavor. Be free to contact him.
2 watts. I listen through a pair of arials. I believe they are supposed to be 92db/meter. I would definitely consider a more efficient speaker.
My First SE Tube Amp
Ok,
So here is my first attempt.
A SE amp with a 6BM8 and a pair of level indicator tubes.
Housing was an old Tandberg tape deck that I salvaced the case and level indicator tubes from.
Drivers were NOS 6BM8 from Zenith.
Have a look at:
YouTube - Tube Amp REV 2 Part 5 - Finished.wmv
I am really proud of it, and it works every day in my office connected to an MP3 player.
I would put up a picture but I cant figure out how..
Charles
Ok,
So here is my first attempt.
A SE amp with a 6BM8 and a pair of level indicator tubes.
Housing was an old Tandberg tape deck that I salvaced the case and level indicator tubes from.
Drivers were NOS 6BM8 from Zenith.
Have a look at:
YouTube - Tube Amp REV 2 Part 5 - Finished.wmv
I am really proud of it, and it works every day in my office connected to an MP3 player.
I would put up a picture but I cant figure out how..
Charles
I have a built a few boxes using the Fostex FE206. An 8" speaker with anefficiency rating of 96db. These are not only excellent sounding drivers but make even my 3W 6AS7 SET sound LOUD!!
http://2.bp.blogspot.com/_qrv-I1oZlnc/TFFxgNxSRkI/AAAAAAAAAcQ/BEuBnhFEbaU/s1600/PinotKiSharnS.jpg
http://3.bp.blogspot.com/_qrv-I1oZlnc/SwOW7cOca9I/AAAAAAAAAYU/BLtLDaEQqfo/s1600/Fostex206ESB.jpg
I'd get some carefully designed boxes for a dual driver arrangement.
Last edited:
OK here's a picture of my latest creation, a single - ended pentode EL84 amp
to the Alex Kitic RH84 design.
Driver is a Mullard E80CC.
to the Alex Kitic RH84 design.
Driver is a Mullard E80CC.
An externally hosted image should be here but it was not working when we last tested it.
6BM8 Amp Info
Thanks, i really am proud of my first project.
Schematics I used are from lighthouse electric:
Low Power SE Vacuum Tube Power Amp
I deleted the neg feedback loop from the output to the input.
The indicator tubes are not too hard to get going.
If you are going to try it just shoot mer an email.
As for output, about 3 watts in triode mode and peaking at 5 in ultralinear.
Nice little listining amp, I use it in my office at work.
And again, thanks!
Thanks, i really am proud of my first project.
Schematics I used are from lighthouse electric:
Low Power SE Vacuum Tube Power Amp
I deleted the neg feedback loop from the output to the input.
The indicator tubes are not too hard to get going.
If you are going to try it just shoot mer an email.
As for output, about 3 watts in triode mode and peaking at 5 in ultralinear.
Nice little listining amp, I use it in my office at work.
And again, thanks!
Hi Azazello
I like small amplifiers too.
Here are a couple more pics of the inside
An externally hosted image should be here but it was not working when we last tested it.
All components to the E80CC dual triode input stage
bar the coupling caps and the feedback resistors ( the ones with the red insulated leads)
had to be stood on end, in order to get them into
the limited space available.
They are terminated at the top onto an up and over earth bar
taken from the input star.
The completed inside is shown below
An externally hosted image should be here but it was not working when we last tested it.
This pic below, gives an idea of the size of the amplifier
An externally hosted image should be here but it was not working when we last tested it.
Steve
Musical Fidelity M1 DAC and sitting on top is a Logitech Squeezebox Touch connected to the DAC.
Steve
And my Pocket amplifiers: 6Ф3П /triode mode/
https://picasaweb.google.com/azazello52/Amplifiers#5580315473544989442
and PP-variant Leibowitz 6Н6П & 6Н1П & EZ81 for my comp.
DSCN0246_S | Flickr - Photo Sharing!
https://picasaweb.google.com/azazello52/Amplifiers#5580315473544989442
and PP-variant Leibowitz 6Н6П & 6Н1П & EZ81 for my comp.
DSCN0246_S | Flickr - Photo Sharing!
Hi Azazello
I like small amplifiers too.
Here are a couple more pics of the inside
An externally hosted image should be here but it was not working when we last tested it.
All components to the E80CC dual triode input stage
bar the coupling caps and the feedback resistors ( the ones with the red insulated leads)
had to be stood on end, in order to get them into
the limited space available.
They are terminated at the top onto an up and over earth bar
taken from the input star.
Great job!
I love the overkill OPTX. The rh really sings with good Ptx.
The completed inside is shown below
An externally hosted image should be here but it was not working when we last tested it.
This pic below, gives an idea of the size of the amplifier
An externally hosted image should be here but it was not working when we last tested it.
Steve