Jump to content
The Klipsch Audio Community
henry4841

Pictures of your Tube Amplifiers

Recommended Posts

sell it... default_tongue.png

What u think I sell everything

I think Joessportster has me beat big time

 

 

Sent from my iPhone using Tapatalk

  • Like 1
  • Haha 1

Share this post


Link to post
Share on other sites

Transcendent Sound Mini Beast amp

Transcendent Sound Slider preamp

JE Labs 2A3 SET amp

Stereo 7.jpg

Stereo 8.jpg

  • Like 4

Share this post


Link to post
Share on other sites

Here is a 2A3 I designed using Edcor iron. The wooden side panels are just about to get finished up. 

3.jpg

4.jpg

2.jpg

1.jpg

  • Like 11

Share this post


Link to post
Share on other sites

That is a thing of beauty. Be proud.

Share this post


Link to post
Share on other sites

Beautiful work George!  A forum member in Tennessee is looking for someone to build him an amp.  PM me if you are interested and I will get you in touch.

 

Maynard

Share this post


Link to post
Share on other sites

Very nice work, George. Does it sound as good as it looks? Is the schematic available?

Share this post


Link to post
Share on other sites

Here is the schematic. No secrets, just a text book design. Although, the 2A3 filaments are using AC, I can barely hear a trace of hum through my LaScala's. I have to stick my head into the horn mouth to hear the faintest sound of hum.

 

True, the 60Hz hum will modulate your music signal, but I can't hear it and I have a pretty good set of ears (i think). I have amps with both AC & DC filaments, but love them all. 

 

Attached are some measurements as well. 

DIY 2A3 Stereo Schematic_v2.1.0_6SL7GT Paralled_5V4_112818.jpg

2A3 Left 1 Watt_Analyzer Panel.jpg

2A3 Right 1 Watt_Analyzer Panel.jpg

2A3 Left Full Power_Analyzer Panel.jpg

2A3 Frequency Response_Both Channels.jpg

  • Like 1
  • Thanks 1

Share this post


Link to post
Share on other sites

Here is a "Williamson" Ultra-Linear amp I built about 25 years ago, but recently transferred the circuitry to new chassis'. The output transformers are Edcor 7.6k to 6 ohm. Power transformers are US military surplus. This particular design is super-stable, no motor-boating or other oscillation issues that some people have reported long ago. 

 

I'm also using 1625's since they are less expensive than 807's or KT66's. Originally, these were wired for 807's, but I bought a good stash of 1625's that should last me the rest of my life. 

Top Front View.jpg

Top Right Side View.jpg

  • Like 4

Share this post


Link to post
Share on other sites

No; not mine, but this thread has me looking at tube amps (again) :) Etheraudio's "Abbsolute Intuition." Only about $400K :( 

abbssolute_intuition_by_etheraudio_1d-675x1024.jpg

  • Like 3

Share this post


Link to post
Share on other sites
18 hours ago, Curious_George said:

Here is a "Williamson" Ultra-Linear amp I built about 25 years ago, but recently transferred the circuitry to new chassis'. The output transformers are Edcor 7.6k to 6 ohm. Power transformers are US military surplus. This particular design is super-stable, no motor-boating or other oscillation issues that some people have reported long ago. 

 

I'm also using 1625's since they are less expensive than 807's or KT66's. Originally, these were wired for 807's, but I bought a good stash of 1625's that should last me the rest of my life.

 

 

Beautiful amps! I would love to see the "undercarriage" pics if you have any.

Share this post


Link to post
Share on other sites
5 hours ago, Curious_George said:

Bottom Chassis View_01.jpg

 

 

I did a 1625 as well since I had a box of 1625s. Good tube but took me forever to dialin.

 

 

 

 

Share this post


Link to post
Share on other sites
Posted (edited)

If you built the original version from 1949 or early 50's I do believe the stories of potential instability on some builds. In addition, depending on the output transformers used, the cap & resistor across the first stage anode resistor and the feedback cap & resistor, there was not much room for error. Layout and parts placement should be well thought out. 

 

The Talbot Wright article helps a bit too. IMO, a robust low impedance power supply will help eliminate a lot of the issues. 

 

I really like the Edcor output transformers, especially the 25 watt, 7.6k multi-tap version. I believe this is the closet thing you will get to an original Stancor A-8072. The Edcor is a bit smaller, but it also is using M6, which IMO is a better core material. 

Edited by Curious_George

Share this post


Link to post
Share on other sites

 No pic yet.....  but I will definitely post my Toolshed 300b once I get it.   

Share this post


Link to post
Share on other sites

Here is a 211 based amp I built about 20 years ago, but recently modified it with a interstage transformer.

 

Class A SE, 25 Watts, no feedback (but have been thinking about adding some feedback lately just to mess around with it).   

211 Mono Amp_Rack_3_compress.jpg

  • Like 1

Share this post


Link to post
Share on other sites

Underside is not as clean as I would like, but it is more of a test bed than anything. 

 

 

211 Mono Amp_Underside_1_compress.jpg

Edited by Curious_George
  • Like 2

Share this post


Link to post
Share on other sites
9 hours ago, Curious_George said:

Here is a 211 based amp I built about 20 years ago, but recently modified it with a interstage transformer.

 

Class A SE, 25 Watts, no feedback (but have been thinking about adding some feedback lately just to mess around with it).   

211 Mono Amp_Rack_3_compress.jpg

 

Would love to see a schematic for this one.... Coool!!!!

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...