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Old 13th April 2011, 07:15 AM   #3361
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Originally Posted by evanc View Post
I guess that is the real question. It sounds great. The imaging and detail are all I expected and more. Also very quiet. Only drawback is it doesen't play super loud. I guess I have some ss amps if I want loud.....Evan
How may watts is it meant to produce? Try some boxes with Fostex 8" drivers for real effecience.
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Old 13th April 2011, 07:53 AM   #3362
panos29 is offline panos29  Greece
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Quote:
Originally Posted by Cagomat View Post
Hi all

finished an cost no object DHT linestage fro use 26 and 801/VT25 triodes.

regards Tony
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?
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Old 13th April 2011, 09:02 AM   #3363
Cagomat is offline Cagomat  Germany
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Default 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...&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.
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Old 13th April 2011, 11:38 AM   #3364
evanc is offline evanc  United States
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Originally Posted by mhouston View Post
How may watts is it meant to produce? Try some boxes with Fostex 8" drivers for real effecience.
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.
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Old 16th April 2011, 06:20 AM   #3365
ccronn is offline ccronn  United States
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Default 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
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Old 17th April 2011, 08:36 PM   #3366
mc352 is offline mc352  United States
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CCRONN,

That looks great. I am new to this site, and went to this last post in the thread, and saw your creation.
I love the indicator tubes.
Do you you have a schematic? What is the output of the amp?
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Old 18th April 2011, 09:43 AM   #3367
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Quote:
Originally Posted by evanc View Post
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.
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-I1oZln...otKiSharnS.jpg

http://3.bp.blogspot.com/_qrv-I1oZln...stex206ESB.jpg
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Old 18th April 2011, 11:42 AM   #3368
evanc is offline evanc  United States
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mhouston,
yes, I like the idea of a simple full range driver. the fostex is an 8 ohm driver. since my amp is set up for a 4 ohm load I could use 2 per cabinet and play really loud......
Evan
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Old 18th April 2011, 11:56 AM   #3369
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Quote:
Originally Posted by evanc View Post
mhouston,
yes, I like the idea of a simple full range driver. the fostex is an 8 ohm driver. since my amp is set up for a 4 ohm load I could use 2 per cabinet and play really loud......
Evan
I'd get some carefully designed boxes for a dual driver arrangement.

Last edited by mhouston; 18th April 2011 at 11:59 AM.
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Old 19th April 2011, 02:14 PM   #3370
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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.

Click the image to open in full size.
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