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Tube Noob! need help with tubes lots of tubes

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Hi this is my first tread here! I found a lot of NOS tubes at a surplus store on the net for about 60$ ! and i was wondering if anyone could give me some advice on a line stage or anything really i could build whit this pile of tubes!:D

Tubes:

4x 6P5
2x 4B31
2x GY501
2x C3gS
2x 6K7 MG
2x R207
6x PB5
8x 1T4
1x 1H6GT sylvania
1x 35Z5GT haltron
6x TX45
1x R212
8x 2J27L
8x 12J1L
 
I once met a lady who made "art" out of tubes.

I had a lot of fun with a propane torch and some useless TV tubes a couple of years ago. Once the glass gets hot enough the vacuum starts playing tricks with the tube´s shape.
A friend did the same thing with a quartet of dead 6L6´s and put them in his fathers EL34 PP amp...:D
 
Don't Despise Your Oddball Tubes

Dear therapy_fan,

Your list of type numbers contains many useful tubes. Don't despise them just because they are oddball types. I don't have experience with all items you mention, but I have used some of them in my own DIY projects. Here is what they are (or seem to be):

6P5 - octal triode (medium mu).
4B31 - high-voltage clipper diode (not very useful for audio).
GY501 - high-voltage diode (not very useful for audio).
C3G - very nice pentode, can also be used as triode, for audio.
6K7 - octal pentode (rather old-fashioned).
R207 - directly heated triode from the 1930s for telephony purposes.
PB5 - I assume this is a misspelling for RB-5 (the Cyrillic letter R looks like a Western letter P): this is an overvoltage protection device, rather useless unless you want to connect it as a spark gap to your outdoor antenna!
1T4 - nice battery tube, pentode, can also be used as triode, for audio.
1H6GT - battery tube - combined triode and double diode, can be used for audio but very low power/anode current and probably microphonic.
35Z5GT - diode rectifier, can be used in power supply to power audio project.
TX45 - the label on this tube has Cyrillic characters, therefore the proper type number is TCh4B (the Russian X sign is like the Greek chi): this is a cold-cathode tube, thyratron for use in Russian television sets from the tube era (channel selection). Not very useful but can be used for experiments, e.g. the building of a sawtooth generator.
R212: directly heated double triode from the 1930s.
2J27L: Russian battery tube (pentode, directly heated), also transcribed as 2SH27L, intended for HF use, but can also be employed for audio with good results, e.g. in triode mode.
12J1L: Russian battery tube (pentode, indirectly heated), also transcribed as 12SH1L, for HF and audio use, can also be employed in triode mode.

On the web, you can find schematics for the 2J27L, 12J1L, 1T4 and C3G, particularly in the German-, Russian- and Hungarian-speaking parts of the world. I have myself experimented with the first 3 of these. My friend Jim de Kort (fellow Dutchman) has experimented with the 1H5GT.

If you send me some additional details regarding your wishes (what kind of preamp would you like to build?), I can send you schematics and give some advice. May send you also datasheets if you are interested.

Best regards from Holland,

arensattic

(Aren van Waarde, Ph.D.,
Nuclear Medicine & Molecular Imaging,
University Medical Center Groningen)
 
Ex-Moderator
Joined 2004
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.
 
nice new post´s

Hello arensattic and ray_moth

Thx for the nice info of my tubes! :) i have´t had much luck finding a really really simple project for Them.

if you have any schematics, datasheet´s of 2J27L, 12J1L, 1T4, C3G or any of the other audio tubes i would be really thankful :)

Actualy yesterday i made my first half working tube amp! :devilr:

It´s a SE el84. have som probs with the powersupply but i hope i will get it working to 100% tomorrow! :smash:


thx once again for the totally unexpected replays!

:D really made my day!

Mattias (Therapy_Fan@hotmail.com
 
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:
http://www.fragjanzuerst.de/rb/2SH27L.pdf

Then, four links to various receiver projects (mainly "audion" receivers, in other words, simple "straight" receiver designs):
http://www.jogis-roehrenbude.de/Leserbriefe/Burkhards-2SH27L-Radio/Tetroden-Audion.htm
http://www.jogis-roehrenbude.de/Leserbriefe/Negadyn_Weiss/Negadyn.htm
http://www.mydarc.de/dk3wi/html/mw-audion_mit_2sh27l_und_18v_a.html
http://www.jogis-roehrenbude.de/Leserbriefe/2,4-Volt-Audion/Audion2V4.htm

A link showing some simple oscillators:
http://www.elexs.de/roe2SH27L.htm

Finally, some amplifier designs.
A single-ended power amplifier from Hungary with 2SH27L and 4P1L: http://www.jgytf.u-szeged.hu/~kadar/projects/amp/4p1l/page_01.htm
And a push-pull amplifier from Germany with twenty-two 2SH27L tubes ! : http://www.jogis-roehrenbude.de/Leserbriefe/Vico-22-Roehren-Amp/Beschreibung.htm

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
 

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ray_moth said:
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. :headbash: Thanks for reminding me I need to pick up some more.
 
nice

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

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


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

Mattias
 
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:

http://www.jogis-roehrenbude.de/Leserbriefe/Oliver-Stick-KH-Amp/Olivers-C3g-KH-Amp.htm

http://www.jogis-roehrenbude.de/Leserbriefe/Peter-Bromberg-C3g-KH-Amp/C3g-Baubeschreibung.htm

http://www.jogis-roehrenbude.de/Leserbriefe/Siemens-C3g/c3g.htm

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

http://www.jogis-roehrenbude.de/Leserbriefe/Hans-Peter-Voelpel-C3G_RIAA/Baubeschreibung.htm

http://www.ak-tubes.de/

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

http://roehrenfibel.files.wordpress.com/2008/07/tractatus-calculo-amplifikatus-2-band.pdf

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
 
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