Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

PIONEER SA-810 Tube Amp Schematics
PIONEER SA-810 Tube Amp Schematics
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 18th September 2018, 11:09 PM   #21
gingertube is offline gingertube  Australia
diyAudio Member
 
Join Date: Oct 2004
Location: Adelaide South Oz
Hope this is readable - else PM me for with an email addressb for the original 1.8MB file
Cheers,
Ian
Attached Images
File Type: jpg SA810s.jpg (993.5 KB, 75 views)
  Reply With Quote
Old 19th September 2018, 01:59 AM   #22
TonyTecson is offline TonyTecson  Philippines
diyAudio Moderator
 
TonyTecson's Avatar
 
Join Date: May 2003
Location: Palatiw, Pasig City
PIONEER SA-810 Tube Amp Schematics
i repaired two pioneer sa-81 a couple of years ago, these used the novar output tubes, 7868, the new production tubes are thick pins so sockets needed changing...
__________________
planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B
  Reply With Quote
Old 19th September 2018, 05:19 AM   #23
gingertube is offline gingertube  Australia
diyAudio Member
 
Join Date: Oct 2004
Location: Adelaide South Oz
Tony,
I have a matched quad of these on my shelf.
7868 Electro Harmonix Power Tubes

Are you saying that they wont go into a Pioneer SA-810 without changing the tube sockets?

Thanks,
Ian
  Reply With Quote
Old 19th September 2018, 06:33 AM   #24
Dynsdale is offline Dynsdale  South Africa
diyAudio Member
 
Join Date: Aug 2005
Location: Simon's Town, Cape Town.
Thanks for the diagram gingertube, perfectly readable.
Hugely appreciated.
As for the sockets I believe one can carefully place the newer EH 7868 in the original socket but it could stretch the contacts and you could be in a situation where the original 7868 will be a rattle fit if you were to revert. The Electro Harmonix EH 7868's pins are .2 mm larger in diameter (Last I checked.) than the original but a lot cheaper than the NOS, unless you find a bargain. I am yet to find the correct socket but one does exist. The operation could be risky I suppose.
  Reply With Quote
Old 19th September 2018, 06:37 AM   #25
TonyTecson is offline TonyTecson  Philippines
diyAudio Moderator
 
TonyTecson's Avatar
 
Join Date: May 2003
Location: Palatiw, Pasig City
PIONEER SA-810 Tube Amp Schematics
Quote:
Originally Posted by gingertube View Post
Tony,
I have a matched quad of these on my shelf.
7868 Electro Harmonix Power Tubes

Are you saying that they wont go into a Pioneer SA-810 without changing the tube sockets?

Thanks,
Ian
Hi, Ian mine was a pioneer sa-81, the original tubes are thin pins, the new production one was thicker pinned, so what i did was to loosen the sockets to accommodate the new production tubes....you can buy the novar 9 pins sockets but once you insert the 7868 new production tubes, then it will become loose for the old tubes..

can you send me the schematics too? thanks, i hate working on gears without proper documentations but sometimes i had to....

i wonder if this is the same as your pioneer sa-810:
Attached Images
File Type: jpg IMG_7674.JPG (588.5 KB, 57 views)
File Type: jpg IMG_7633 (2).JPG (526.6 KB, 51 views)
__________________
planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B
  Reply With Quote
Old 19th September 2018, 11:36 PM   #26
Eli Duttman is offline Eli Duttman  United States
diyAudio Member
 
Join Date: Apr 2004
Location: Monroe Township, NJ
Quote:
Originally Posted by Dynsdale View Post
Thanks for the diagram gingertube, perfectly readable.
Hugely appreciated.
As for the sockets I believe one can carefully place the newer EH 7868 in the original socket but it could stretch the contacts and you could be in a situation where the original 7868 will be a rattle fit if you were to revert. The Electro Harmonix EH 7868's pins are .2 mm larger in diameter (Last I checked.) than the original but a lot cheaper than the NOS, unless you find a bargain. I am yet to find the correct socket but one does exist. The operation could be risky I suppose.
Yes, OS 7868s have Novar bases, while the current production EH variant has a Magnoval base. The pin circles are the same, but Magnoval pins are "fatter". The socket stretching issue is academic, as OS 7868s are not available. The New Sensor product saves units that can't be converted to 7591s.

Ditto on the schematic, it's saved and may be passed on.
__________________
Eli D.
  Reply With Quote
Old 20th September 2018, 12:21 AM   #27
TonyTecson is offline TonyTecson  Philippines
diyAudio Moderator
 
TonyTecson's Avatar
 
Join Date: May 2003
Location: Palatiw, Pasig City
PIONEER SA-810 Tube Amp Schematics
i remember by first encounter with the EH7868 was with a Fisher 500 receiver...
pins are simply too thick to seat in...
__________________
planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B
  Reply With Quote

Reply


PIONEER SA-810 Tube Amp SchematicsHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Pioneer Tube Schematics janixa Tubes / Valves 5 25th March 2010 09:45 PM
Schematics for Pioneer SX-434 wising Solid State 5 23rd September 2009 03:31 PM
pioneer schematics lt cdr data Solid State 0 20th October 2006 12:00 PM
Pioneer A-757 schematics bzfcocon Solid State 3 15th March 2006 05:15 PM
need schematics for pioneer pd-95 Alexiss Solid State 0 8th October 2003 11:18 AM


New To Site? Need Help?

All times are GMT. The time now is 05:19 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki