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

2 pairs of 8150's
2 pairs of 8150's
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 23rd February 2010, 12:33 AM   #1
rsumperl is offline rsumperl  United States
diyAudio Member
rsumperl's Avatar
Join Date: Oct 2009
Location: Cascade, Idaho
2 pairs of 8150's
Default 2 pairs of 8150's

I have 2 pairs of 8150's that I'll give away to 2 different people to do some audio testing on. Get me at rsumperl@hhk.com I'll even pay shipping.

  Reply With Quote
Old 23rd February 2010, 01:08 AM   #2
astouffer is offline astouffer  United States
diyAudio Member
astouffer's Avatar
Join Date: Jun 2004
Location: Pittsburgh, crumbling wasteland
According to "Tube Lore" an 8150 is an 8149 with a plate cap. An 8149 is a 7984 with a center tapped heater. And finally we have a datasheet!


Note the CCS/ICAS/IMS ratings. Plate dissapation is 35 watts but only intermittent. Pd is further reduced to 20 watts continuous.

On a side note I was looking over the specs for a 5866 triode. Looks like a good candidate for class A2 with Tubelab's Powerdrive idea. Shame that the pair in my junkbox look pretty well used. And while I'm ranting... Those 4-65a tubes are always mocking me. They are cheap and look cool but practically worthless for audio. One guy managed to get a few watts from a pair but why bother at that point.
  Reply With Quote
Old 23rd February 2010, 06:43 PM   #3
m6tt is offline m6tt  United States
diyAudio Member
Join Date: Aug 2007
Seems like an uprated 6146 family structure in there. The max voltages are identical compared to astoufer's datasheet, and Pd for 6146b is 27, versus 35 icas for the 7984. The curves look fairly similar, although not identical.

Probably wants to run in near class B in pentode mode.
  Reply With Quote


2 pairs of 8150'sHide 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
5 pairs of outputs on +-120V... megajocke Solid State 11 20th May 2008 06:04 PM
How many pairs? kasiss Solid State 6 22nd June 2006 02:51 PM
2 sub pairs in series...4+8 ChesterFuzzin' Subwoofers 7 17th August 2004 08:35 PM
2 pairs of DIY Dipoles johninCR Multi-Way 4 15th May 2004 05:17 AM
Differential Pairs Piersma Solid State 4 19th June 2003 12:28 PM

New To Site? Need Help?

All times are GMT. The time now is 04:49 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