Opinion upon amp life expectancy at 5 hours/day? (theres a catch) - Page 2 - 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 17th January 2004, 03:26 PM   #11
diyAudio Member
 
Join Date: Jan 2004
Location: nowhere
What brand are they?
  Reply With Quote
Old 17th January 2004, 03:28 PM   #12
diyAudio Member
 
Join Date: Jan 2004
Location: nowhere
oh electroharmonix
  Reply With Quote
Old 17th January 2004, 03:30 PM   #13
diyAudio Member
 
Frank Berry's Avatar
 
Join Date: Sep 2003
Location: Midland, Michigan
Tubes can last a very, very long time if they are operated within their design specs.

I have a Zenith Console Radio that was manufactured in 1938.
It operates with six of it's original tubes!
__________________
Frank
  Reply With Quote
Old 17th January 2004, 03:52 PM   #14
diyAudio Member
 
Join Date: Jan 2004
Location: nowhere
mmm I can understand why they are so reliable, in 1938 I bet not too many could pay the power bill long enough to have them on for a few hours a week!

AND of course the makeup of mere metal and solder with a burning wire doesn't exactly allow for very much mechanical failure = if they aren't running hot :P

I intend wholeheartedly to run everything "just" below spec, I'm making a valve amplifier not only for:

1. Looks
2. Sound quality with such a simple design.
3. My KISS methodology to everything.
4. I can brag that my amp has more useful watts. Can I? :P No.
5. Everything in nature and life (reality) has it's own character.
6. Reliability! (I don't have to go to wal-mart/future-bi-lo to get another one in 50 years)
7. Now in the state of the supply of electricity to homes it's more important to me to have something able to handle that extra sudden 60volts and still be alive.
8. I've replaced so much "modern, reliable, tech" bull it's makin me sick and turning me green /me grabs hat and runs off nude
9. If I ever get struck by lightning, I want something that they can sell for a coffin on ebay.com.au. (Probably get $1)
10. I LOVE kick-*** nostalgia from 1930's on :P

Cheers!
  Reply With Quote
Old 17th January 2004, 04:05 PM   #15
diyAudio Member
 
Join Date: Mar 2002
Location: Canada
Default Different experience

I was seriously into amateur radio in its last tube only days, and my experience about the reliability of tubes is radically different than what has been reported here. Our (then) posh receivers typically had 20-30 tubes in them, and for maximum performance I was replacing one or another every couple of months.

Anyone remember tube-based colour televisions: nightmares re: reliability because of tube deterioration. Norman
  Reply With Quote
Old 17th January 2004, 04:22 PM   #16
diyAudio Member
 
Join Date: Jan 2004
Location: nowhere
mmm yes, but you must remember nearly all early and even late tv's had plenty of high-powered high-voltage components and were /VERY/ heavily manufactured, maybe most manufacturers cut corners and used the most possible out of the humble tube, although I don't see how that could affect valves like in the audio stage or first stage of VHF amps?

Driver tubes I could understand, come on 6+ kV? :P

I can't say anything to calm your 'receiver' woes tho..

hmm A LOT of valves!

Maybe before the days that FM was easy?

Cheers.
  Reply With Quote
Old 17th January 2004, 04:25 PM   #17
diyAudio Member
 
Join Date: Jan 2004
Location: nowhere
Heck it could all be put down to poor design of other components than the tubes that ofcourse /made/ the tubes degrade more often than they should be?
  Reply With Quote
Old 17th January 2004, 04:28 PM   #18
diyAudio Member
 
Join Date: Mar 2002
Location: Canada
Default clarification

Sorry, in regard to tube-based colur television reliability I wasn't referring to the picture tube, but to the others.

Anyone around in those days will recall that tube replacement in televisions and radios was so frequently required that customer-run tube testers and tube supplies were even available in supermarkets. Norman
  Reply With Quote
Old 17th January 2004, 04:53 PM   #19
diyAudio Member
 
Join Date: Jan 2004
Location: nowhere
Ehm,

Yes I know tube replacement was often in Tv sets back then, my brother's father told me a few times that tv tubes in tv sets were always being replaced, not to mention I also got my share of old-time american movies where they were replacing valves on tv or having a referral towards them getting replaced..

Maybe this is what threw you off :P

"Driver tubes I could understand, come on 6+ kV? :P"

It is late and I think i'll go :P

also, I'm easy on people, but not when I'm tired, so i'm a bit grouchy. sorry.
  Reply With Quote
Old 17th January 2004, 04:59 PM   #20
diyAudio Member
 
Join Date: Jan 2004
Location: nowhere
And yes, the CRT was hardly ever replaced, half of the time it could be fixed by a simple jolt to one of the guns (not sure of details, but i'm sure any half-witted electro-jocky could tell you that it's still done today)..

Most of the time it was some other component, till this day the CRT is the most reliable component of the TV set!

Although don't mess with them in old sets pre-1980 even.

They're like bombs just moving an old-style tv set is risking your neck! or for better words risking plenty of cuts and maybe even a hand inside a heap of imploded glass fragments, that or a discharge from the set circut itself that could blow you straight flat on your back over a varandah or something :P

I remember reading an old 1970's tv repair manual that I still have handy somewhere, In a 'Saftey' portion of the book front-and centre it had the picture of a nice 1950's set with a whole heap of fragments all over the floor up to 12 foot from the set!!

Cheers.
  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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Lucky catch steenoe Everything Else 11 9th March 2009 02:52 AM
Fake Parts - Catch 22 Chinese style mobyd Parts 4 7th March 2008 05:16 AM
scored a tft cheaply, but with a catch Christian Everything Else 0 27th February 2005 02:41 PM
tube rectifier life expectancy Raj1 Tubes / Valves 12 20th June 2004 05:40 PM


New To Site? Need Help?

All times are GMT. The time now is 04:45 PM.


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