Tube Noob! need help with tubes lots of tubes - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs 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

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 January 2009, 06:56 AM   #11
diyAudio Member
Miles Prower's Avatar
Join Date: May 2005
Location: USA
Blog Entries: 7
Default Re: nice new post´s

Originally posted by therapy_fan
if you have any schematics, datasheet´s of 2J27L, 12J1L, 1T4, C3G or any of the other audio tubes i would be really thankful
You can get VT spec sheets from Frank's
There are no foxes in atheistholes
  Reply With Quote
Old 23rd January 2009, 08:26 AM   #12
diyAudio Moderator Emeritus
ray_moth's Avatar
Join Date: Jan 2004
Location: Jakarta
I find this site by Max Robinson contains lots of ideas for both simple and more advanced projects.
  Reply With Quote
Old 23rd January 2009, 11:01 PM   #13
diyAudio Member
arensattic's Avatar
Join Date: Mar 2006
Location: Groningen
Default Some projects with 2SH27L (=2J27L)

Dear Matthias and others,

As promised I'll start here with links to some projects on the web using the Russian battery valve 2SH27L (=2J27L).

First, a link to a nice collection of datasheets for this tube, with a translation of the Russian text into German:

Then, four links to various receiver projects (mainly "audion" receivers, in other words, simple "straight" receiver designs):

A link showing some simple oscillators:

Finally, some amplifier designs.
A single-ended power amplifier from Hungary with 2SH27L and 4P1L:
And a push-pull amplifier from Germany with twenty-two 2SH27L tubes ! :

I have built and tested a preamp stage with the 2SH27L based on the previously mentioned schematic from Hungary (University of Szeged), it works very well. I add a hand-drawn schematic, please note that the cathode resistor is a 2k Cermet trimpot. This should be adjusted in such a way that the anode voltage is 67 V (= the anode current is 2 mA).

Hopefully these hyperlinks will be copied properly to the diyaudio forum, and the handdrawn schematic will be readable.

Best regards,

Aren van Waarde
aka arensattic
Attached Images
File Type: gif dhtpre2.gif (33.9 KB, 395 views)
Real HiFi runs hot and has only one speaker unit per audio channel.
  Reply With Quote
Old 24th January 2009, 07:52 AM   #14
Bitrex is offline Bitrex  United States
diyAudio Member
Join Date: Jan 2009
Originally posted by ray_moth
I agree that 1T4 (a.k.a. DF91?) is a nice miniature 7-pin battery pentode. It needs 1.4 v for the filament. I built my very first single tube grid-leak detector AM headphone receiver with reaction control using this little tube, with a Repanco LW/MW tuning coil.

I built a regenerative reciever kit that used two 1T4 tubes, one as an RF amplifier and the other as the regenerative detector. Unfortunately one evening a while back I got the supply terminals confused and put the 45 volt B+ across the tube heaters. Thanks for reminding me I need to pick up some more.
  Reply With Quote
Old 24th January 2009, 12:29 PM   #15
diyAudio Member
Join Date: Nov 2006
Default nice

Thx for the awesome replays. i will absolutely out the 2SH27L pre amp stage! twenty-two 2SH27L amp omg! that was a really nice amp!

btw i just ordered a Tube amp! an Dynavox VR-70E for just under 400euro i just had to buy it! seen some wery impressive
modifications on an vr-70 so i had to try one out!

thx again for the nice replay i will try out the nice looking schematic seems strait forward enogh.

  Reply With Quote
Old 29th January 2009, 09:01 PM   #16
diyAudio Member
arensattic's Avatar
Join Date: Mar 2006
Location: Groningen
Default Some projects with C3G

Dear Matthias and others,

It is a little busy right now, but here are some projects for the C3G pentode (I don't have experience with this tube myself):

First, a few headphone amplifiers:

Then, a few RIAA preamplifiers (for turntable cartridge):

Finally, a funny tutorial about calculating preamp stages with a pentode like the C3G:


I must apologize for the fact that all these documents are in German (no problem for a Dutchman like me, but perhaps a problem for other readers). You may try Babelfish for a mechanical translation from German to English, also: the schematics are simple and straightforward.

Best regards,

Aren van Waarde
Real HiFi runs hot and has only one speaker unit per audio channel.
  Reply With Quote


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
FS: Lots of 5 tubes & Lot of capacitors (incl. Vitamin Q's) MoodySteve Swap Meet 2 23rd June 2009 04:35 PM
F/S lots of tubes cheap ltr317 Swap Meet 0 1st December 2008 05:13 AM
Lots of valve / tubes for sale in Leeds (UK) Merlinb Vendor's Bazaar 0 12th October 2008 05:24 PM
WTT: Various tubes for 6CA4/EZ81 rectifier tubes GordonW Swap Meet 4 27th August 2008 12:37 AM
Lots of parts on Ebay!!! Tubes, transformers etc... mwmitchell Swap Meet 0 19th December 2003 06:21 PM

New To Site? Need Help?

All times are GMT. The time now is 04:35 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2