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

help with restoring amp
help with restoring amp
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
Thread Tools Search this Thread
Old 8th May 2004, 03:35 AM   #11
Eli Duttman is offline Eli Duttman  United States
diyAudio Member
Join Date: Apr 2004
Location: Monroe Township, NJ
whats sand and selenium??
Sand is tubehead talk for SS (Silicon).

Before Germanium and, later, Silicon based semiconductors came on stream, semiconductor rectifiers based on the metalloid Selenium were available. Selenium is in the same column of the Periodic Table as Oxygen and Sulfur. Selenium rectifiers look like a stack of square fins. Selenium rectifiers are accidents waiting to happen and MUST be replaced QUICKLY. It is only a question of when, not if, a Selenium rectifier will fail. When Selenium rectifiers fail, toxic vapor and dust is emitted. Other parts may be damaged too. You will probably have to allow for the smaller forward voltage drop modern Silicon diodes exhibit. The UF4007 is a good choice for fabricating Selenium rectifier replacements.
Eli D.
  Reply With Quote


help with restoring ampHide 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
Restoring B&W 2200 cliffforrest Multi-Way 23 9th June 2010 09:35 PM
Restoring old suspension rjb Multi-Way 1 23rd June 2008 03:54 AM
Upgrades and Restoring Bigred Solid State 15 21st August 2007 01:55 AM
Restoring Veneer richie00boy Everything Else 30 26th March 2007 02:38 PM
restoring a marantz 7c pchoi122 Tubes / Valves 3 23rd December 2005 12:30 AM

New To Site? Need Help?

All times are GMT. The time now is 11:39 AM.

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