Photo Gallery - Page 360 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 14th August 2011, 10:53 AM   #3591
diyAudio Member
 
mindutis's Avatar
 
Join Date: Apr 2008
Location: Sweden
And dont forget a very helpful tool for turning on and off...

Click the image to open in full size.
  Reply With Quote
Old 14th August 2011, 01:22 PM   #3592
diyAudio Member
 
Join Date: Jun 2011
Mindutis: yes. Switches requiring brute tactile force make them feel solid. :-)

Update about the bias: the Shuguangs were running at an OK level from the factory. The plate voltage was 401 V and the cathode currents were L: 52 mA and R: 53 mA - giving a a value of > 21 W which seemed high to me but the specs claim a max 30 W for Shuguangs - so it was exactly 70%. Tested a lower level and adjusted both to 40 mA giving a 412 V and thus 16.5 W. Seems enough for me (sound is the same) and maybe get a better life for the tubes?
  Reply With Quote
Old 14th August 2011, 02:34 PM   #3593
Cassiel is offline Cassiel  Libya
diyAudio Member
 
Cassiel's Avatar
 
Join Date: Sep 2004
Location: Madrid
Quote:
DIY Tube amp and matching speakers
I love it!
  Reply With Quote
Old 19th August 2011, 02:36 AM   #3594
diyAudio Member
 
Join Date: Dec 2008
Location: Victoria, BC
Default Poddwatt

A recent build of Bruce Heran's Poddwatt......

6N1P drivers, EL84 (6P14P-EV) outputs.
Heath SA-2 OTs.
Power transformer was something I had on the shelf, but was a bit small, so I added a filament transformer.

Cherry knob and end plates.
Attached Images
File Type: jpg podwatt_1.jpg (37.7 KB, 1292 views)
File Type: jpg poddwatt_2.jpg (31.0 KB, 1287 views)
  Reply With Quote
Old 19th August 2011, 02:43 AM   #3595
diyAudio Member
 
Join Date: Dec 2008
Location: Victoria, BC
Default RH84 from RCA Victor console

Console pull was a Canadian RCA Victor with a voltage doubler power supply. Initially I thought I would be able to use the old can caps, but the hum level was too high, so I stacked some new caps under the deck. I left the smaller cans in place, disconnected.

The chassis wasn't really suitable for leaving exposed, so I built a wooden case - open backed.
Box is finger-jointed black cherry with spalted arbutus sawn veneer faceplate.

The chassis is raised about 1/4 inch so that there is good air flow via the bottom gap and the numerous perforations in the chassis top.
Attached Images
File Type: jpg case_1.jpg (37.8 KB, 1280 views)
File Type: jpg case_2.jpg (29.2 KB, 1280 views)
File Type: jpg under_1.jpg (50.6 KB, 425 views)
  Reply With Quote
Old 19th August 2011, 02:48 AM   #3596
diyAudio Member
 
mhouston's Avatar
 
Join Date: Jan 2006
Location: Victoria, Australia
Quote:
Originally Posted by VictoriaGuy View Post
A recent build of Bruce Heran's Poddwatt......

6N1P drivers, EL84 (6P14P-EV) outputs.
Heath SA-2 OTs.
Power transformer was something I had on the shelf, but was a bit small, so I added a filament transformer.

Cherry knob and end plates.
Good work. I like the bit of timber.
  Reply With Quote
Old 19th August 2011, 02:52 AM   #3597
diyAudio Member
 
Join Date: Dec 2008
Location: Victoria, BC
Default RH84 from Chisholm console

Console pull - made in Port Moody,BC by Chisholm.

The IEC power entry fit (with some work) into the hole left by the octal socket which communicated with the tuner & control panel in the console.
I used the original tube sockets which were fairly good quality. Desoldering the (very well-done) original construction was a bit of work. Usually the final lug on the tube socket is the one that breaks. Either my technique is improving or I'm getting lucky: this time everything survived.

End plates are curly arbutus.
Attached Images
File Type: jpg under_1.jpg (46.9 KB, 395 views)
File Type: jpg top_1.jpg (39.6 KB, 374 views)
File Type: jpg top_2.jpg (46.5 KB, 381 views)
  Reply With Quote
Old 19th August 2011, 10:32 AM   #3598
diyAudio Moderator Emeritus
 
Bas Horneman's Avatar
 
Join Date: Apr 2002
Location: The Netherlands
Blog Entries: 18
Quote:
A recent build of Bruce Heran's Poddwatt......
How do you like that soundwize?
  Reply With Quote
Old 19th August 2011, 06:28 PM   #3599
diyAudio Member
 
Join Date: Dec 2008
Location: Victoria, BC
Quote:
Originally Posted by Bas Horneman View Post
How do you like that soundwize?
It sounds good, but in retrospect seems a lot of work for the modest power output it develops (~2 watts). I need to get some more measurements to try to figure out why my build isn't developing more power.
  Reply With Quote
Old 21st August 2011, 03:49 PM   #3600
diyAudio Member
 
lenamit's Avatar
 
Join Date: Aug 2011
Default 807 SE

I am a new member, this is done I just Monoblock, PSU, OPT, chassis
Diy at home.
Attached Images
File Type: jpg CIMG4735.JPG (161.3 KB, 605 views)
File Type: jpg CIMG4737.JPG (143.4 KB, 593 views)
File Type: jpg 807 Se Mit copy copy.jpg (34.9 KB, 382 views)
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 07:38 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2