Russian L3-3 tube tester - Page 11 - 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 October 2010, 07:51 AM   #101
diyAudio Member
 
Join Date: Sep 2010
Thumbs up Excel models for L3-3 test cards

Hi,

I've made for my personal training an Excel model of the L3-3 universal test card. It can be used for those who want to practice and to understand the programming of this unit, in order to measure another tubes.

Click the image to open in full size.

I am attaching to this message a ZIP arhive that contains the folowing two files (that are also mirrored on my site, see the links):
NOTE:
The hardware lines {A to I} on the L3-3 tester schematic diagram (and universal test card) are labeled as {F1 to F9} in the Robert W. Berger docs.


Hope that these will help .

Best regards,
Cezar
Attached Files
File Type: zip L3-3_XLS_test_cards.zip (14.5 KB, 222 views)
  Reply With Quote
Old 17th October 2010, 01:50 PM   #102
diyAudio Member
 
Join Date: Sep 2010
Smile Measuring non-russian 9pin tubes with L3-3 (part1)

Good afternoon my friends,
(because here the time is 4:10PM, hi)

It's Sunday and after a couple of hours of tests and measurements, that LED from my head began to shine

Well, for using the socket no.11 at full capacity, I just installed a switch that connects line F9 (or 'I' in the russian schematic) with the G2 power supply (the common point of the contacts {61,62,63,64,65,66}/I and 61/II.
When I want to connect F9 to the Ug2, I just push that button
Here is the modified zone (see also the attachments):

Click the image to open in full size.

After that, I've built right from the scratch two new test-cards for EF80 and EF89. Below you may see the snapshots of these cards, and you also may download them from the ZIP file attached (or by accessing the links from my site).

Click the image to open in full size.

Click the image to open in full size.

NOTE (ERRATA):
In the previous post, I've labeled as "Ig2 scale" (wrong!) the test-card area for {Ua scale} - that is containing pins no. {8,9 and 10}/II . Now I've corrected that mistake. Please excuse me!

External resource links:

WARNING! VERY IMPORTANT!

When using the installed switch "ON" (i.e. line F9 connected to Ug2 power supply),
ALWAYS CHECK THAT {43/II ; 51/II; or 50/I} pins to be NOT CONNECTED !!!


Results

EF89 TEST1
Va=250V, Vg2=130V, Vg1=-2V, Vg3=0V
---> Ia = 13.8mA, Ig2 = 5.5mA and S=4mA/V
[right as in the datasheet graphics!]

EF89 TEST2
Va=250V, Vg2=100V, Vg1=-2V, Vg3=0V
---> Ia = 8.4mA, Ig2 = 3.2mA and S=3mA/V
[again, the results match the datasheet specs!]

For those that are interested, here are the links with my Excel test-cards.


Good luck and all the best !

Cezar
Attached Images
File Type: jpg L3-3_external_F9_sw.JPG (75.3 KB, 412 views)
Attached Files
File Type: zip EF80&EF89_test_cards.zip (14.9 KB, 65 views)
  Reply With Quote
Old 19th October 2010, 08:55 PM   #103
diyAudio Member
 
Join Date: Aug 2008
For anyone who interested - I wrote user manual for this tester (in English), with some translations between Russian/English. Draft version is available here:

L1-3/L3-3 Vacuum Tube/Valve Tester User Manual | MacGuru HQ

If someone will find typos/mistakes, or just have a suggestion(s), please do not hesitate to e-mail me.
  Reply With Quote
Old 20th October 2010, 12:51 AM   #104
diyAudio Member
 
Join Date: Jul 2010
Thumbs up User manual

Thank you for that translated manual and keep the torch burning.
  Reply With Quote
Old 22nd October 2010, 09:21 PM   #105
diyAudio Member
 
Join Date: Sep 2010
Exclamation How to make new L3-3 testcards

Hi all,

Because the german SPlan software (used by A.Rudolph to make extra testcards sets) is not free, I developed another practical method, using ExpressPCB software that you can download and use for free.

Here is a snapshot of the L3-3 universal card (translated in English) made with ExpressPCB:
Click the image to open in full size.
The testcard file is attached to this message, but you can also download from my page.

For those who are interested to see the EF89 testcard made with ExpressPCB, here is a snapshot:
Click the image to open in full size.
Tomorrow I'll be back to put here also the download link.

WARNING! These testcards are designed to use the F9 (I) line linked to Ug2, trough an extra switch. See my previous postings for details.

Best regards,
Cezar
Attached Files
File Type: zip L3-3_universal_card.zip (15.9 KB, 78 views)

Last edited by yo3fhm; 22nd October 2010 at 09:23 PM.
  Reply With Quote
Old 24th October 2010, 07:56 PM   #106
diyAudio Member
 
Join Date: Sep 2010
Exclamation EF89 final testcard & measurements

Hi all,
Sorry for the delay. I'm back to put here the final form of the EF89 testcard made with ExpressPCB (revision 1.1 from 23.10.2010) and also the results of some measurements for its transconductance (slope).

You will see here two screenshots. All of the files for EF89 are archived and attached in a ZIP file that you may also download from my site.

This is the snapshot of the final form of the EF89 testcard. Please note that it is using socket no.11 and the 9th line is connected to the Ug2 power supply via a small switch (see my previous posts about this). This card is usable ONLY in this form of hardware setup !

Click the image to open in full size.

... and here is a snapshot of the slope compared measurements:

Click the image to open in full size.

3 sets of direct measurements with L3-3 are in the TABLE1, for Ug1 = -1, -2 and -3V. I kept Ua=250V, Ug2=100V and Ug3=0 unchanged (constant).

As you can see, in TABLE2 I've applied the classic formula of transconductance, and the results are very close to the readings from the L3-3 slope dynamic tests.

Here you cand download the:
... and here is the ZIP file with all of docs included .

If anyone want to write me any direct mail, please do this to the
following E-mail address: yo3fhm [at] yahoo [dot] com .

Best of luck,
Cezar
Attached Files
File Type: zip EF89_testcard_final.zip (132.6 KB, 36 views)
  Reply With Quote
Old 13th December 2010, 08:57 PM   #107
arhd45 is offline arhd45  Germany
diyAudio Member
 
Join Date: Dec 2010
Location: Frankfurt am Main
Default L1-3: EF89 Card from Arthur Rudolph -Danger?

Hello, Mr. yo3fhm
if you test an EF89 with my card without adapter box, you will destroy the tester!
If you look on my card, you will read "socket A5", this means socket Nr.5 on the adapter box.
Many noval tubes need an other wiring than on the Nr.11 and Nr.12 on the tester, thus i designed and build an adapterbox, see
L1-3 Adapterbox
If you need more information pleas write me.
All my cards where socket begins with "A" need the adapter.
Yours sincerely

arthur
  Reply With Quote
Old 26th December 2010, 11:17 AM   #108
diyAudio Member
 
Join Date: Jan 2006
Location: hanoi
Hi everyone, I just happened to catch a L3-3 out of a pile of junk. The condition of this one was very very bad: no tube, no lid cover, no card, miss something here something there inside, the meter is broken ... but after some study I think I can repair this one.
Now I'm trying to rewire some broken connections and replace the bad components, and the first thing I do is recap, what I want to ask is should I use new electrolytic ones with high value than the original, or should I use the same?

Regards,
Duong.
  Reply With Quote
Old 8th January 2011, 08:56 AM   #109
arhd45 is offline arhd45  Germany
diyAudio Member
 
Join Date: Dec 2010
Location: Frankfurt am Main
Default L3-3 Recap and restauration

Hello Mr. Duong,

you should use the same values of capacity like original, because this could affect the stabilisators and the measuring of mutual conductance.
If you can find MP condensors which fit- no problem.
Electrolytic condensors should withstand high temperatures, use mi. 105C types, because the tester goes hot in use.
If you need the original cards as pdf you can downlowd them from
http://www.afrudolph.de/l1-3/l33.zip.
Good luck for restauration.
Regards
arthur
  Reply With Quote
Old 28th March 2011, 03:57 PM   #110
diyAudio Member
 
Stefanoaudio's Avatar
 
Join Date: Aug 2008
Location: Italy
Lightbulb (Dumb) question

Hello, I have a question, probably a dumb one. I'd like to change the cord of my L3-3, using a 3-wires new cord and plug.

Can I connect the yellow-green earth wire to the earth pin on the front of the tester? I guess this would ensure a safer electrical connection, right?

Or am I completely wrong?

Thanks for your help.

Steve
  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
Strange Russian(?) tube tester sharpi31 Tubes / Valves 6 27th March 2008 10:27 PM


New To Site? Need Help?

All times are GMT. The time now is 02:34 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