EMC Model 200 Tube Tester Any Info Pls - 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 19th July 2007, 10:00 PM   #1
Dr ZEE is offline Dr ZEE  United States
diyAudio Member
 
Dr ZEE's Avatar
 
Join Date: Jul 2007
Question EMC Model 200 Tube Tester Any Info Pls

Hello all good ppl!
I've almost finished electronically restoring this old EMC 200 (transconductance) tube tester. Will work of enclosure woodwork later.
The problem I have here is that I am having hard time trying to locate any instructional material on this unit. I kind of can figure out some action on how to use it based on my previous experience but it is pretty hard guessing work and it would help a lot if I could find any material on this machine.
If anybody could give me a lead or a tip It would be greatly appreciated.
Maybe there's some spot on the internet that is hidden from searches or something? I almost gave up trying to find any material.
Thanks in advance
/respects
**********
I am attaching a photo of the tester on my bench:
Attached Images
File Type: jpg emc200tester.jpg (76.3 KB, 200 views)
__________________
Mike Zee aka Dr ZEE
MZE | DZW
  Reply With Quote
Old 19th July 2007, 11:01 PM   #2
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Bama doesn't have a manual for the 200, but has manuals for several other models. Perhaps there is something useful in them:

http://bama.sbc.edu/emc.htm
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 19th July 2007, 11:14 PM   #3
Dr ZEE is offline Dr ZEE  United States
diyAudio Member
 
Dr ZEE's Avatar
 
Join Date: Jul 2007
Couple notes here.
First of all SORRY for double post here. I though somthing went wrong when posting the thread. Had no idea about "under moderation" period.
*********
also, I have found info about 205 model, which is similar unit but 'emission type'. It gives me some starting point ideas on how to use 200.
found here: http://www.jogis-roehrenbude.de/Roe-Pruefer.htm
__________________
Mike Zee aka Dr ZEE
MZE | DZW
  Reply With Quote
Old 19th July 2007, 11:14 PM   #4
Dr ZEE is offline Dr ZEE  United States
diyAudio Member
 
Dr ZEE's Avatar
 
Join Date: Jul 2007
Kevin, thanks a ton for trying to help. Yeah, I had been at bama and got those too. Actually I have this mirror page: http://bama.edebris.com/manuals/ , as I get "not found" all the time at http://bama.sbc.edu
__________________
Mike Zee aka Dr ZEE
MZE | DZW
  Reply With Quote
Old 19th July 2007, 11:39 PM   #5
diyAudio Member
 
Join Date: Apr 2005
Location: ffx station, va
The 211 & 213 at bama are from the 1960s. Your 200 is 1946. Probably not much help in those manuals.

Might try some of the vintage radio forums, or track down a copy from one of the online dealers.
__________________
-e
  Reply With Quote
Old 20th July 2007, 02:05 AM   #6
Dr ZEE is offline Dr ZEE  United States
diyAudio Member
 
Dr ZEE's Avatar
 
Join Date: Jul 2007
Quote:
Originally posted by ethermion
The 211 & 213 at bama are from the 1960s. Your 200 is 1946. Probably not much help in those manuals.

Might try some of the vintage radio forums, or track down a copy from one of the online dealers.
Yep. I went through those. 205 unit is as close as it gets I guess. I thoguht it would be somewhat easier to figure the unit out without manual, but not so. It's a puzzle


Try and see what's gonna happen is not a good idea in this situation. I'll keep trying to find something. I have not seen that manual anywhere for sale either. I may end up to completely reverse-engineering the unit ... hope not
__________________
Mike Zee aka Dr ZEE
MZE | DZW
  Reply With Quote
Old 20th July 2007, 05:36 PM   #7
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Hi Dr. Zee,
One thought that comes to mind is that all of the settings required to use the tester (at least for the types then available) should be in the roll chart.

If you can post a good picture of the entire chart showing a type listing we might be able to decipher how to set up the tester to actually test tubes. Worst case just type the entries from an entire row..

I have the manuals for my Hickok, but have hardly ever had to refer to them - the charts should be fairly intuitive once you are familiar with them. (Now the Hickok charts might have been better than the EMC charts, but I'll bet there is not that much difference.)
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 20th July 2007, 11:19 PM   #8
Dr ZEE is offline Dr ZEE  United States
diyAudio Member
 
Dr ZEE's Avatar
 
Join Date: Jul 2007
Kevin, thanks a bunch again.
I've made some extra photos. Am posting them in the following posts.
Any thought or an idea would be a help. As I kind of figured that it is not going to be a simple tast to simply "reverse engineer" this thing. It may not look like a big deal, but actually to try to catch the principle(s) behind this unit with no leads is pretty damn challenging, well, for me anyway.
I've done pretty much everything that looked like had to be done as bringing this unit to life. Replaced couple resistors, caps, cleand all the switched and pots in and out etc. I've powered it up. Got to the point of setting the L.V. level. All looks and smells good . But this is it. I have not tried yet to actually insert a tube, because I don't want to get in trouble before I get some idea about what I am doing.
My current guess is , that all the switches should be in "K" position. Then you start settings from there, but the order of actions and what I should and should not switch etc ... all bunch of unknowns for me.
OK, here we go with photos.
__________________
Mike Zee aka Dr ZEE
MZE | DZW
  Reply With Quote
Old 20th July 2007, 11:20 PM   #9
Dr ZEE is offline Dr ZEE  United States
diyAudio Member
 
Dr ZEE's Avatar
 
Join Date: Jul 2007
here's left side (6L6 there as example)
Attached Images
File Type: jpg emc200_setup_left.jpg (45.8 KB, 136 views)
__________________
Mike Zee aka Dr ZEE
MZE | DZW
  Reply With Quote
Old 20th July 2007, 11:23 PM   #10
Dr ZEE is offline Dr ZEE  United States
diyAudio Member
 
Dr ZEE's Avatar
 
Join Date: Jul 2007
here's right side with 12ASX7
"S" infront of the tube type means that the "N/S" switch should be in "S" position for this type of tube
Attached Images
File Type: jpg emc200_setup_right.jpg (59.0 KB, 129 views)
__________________
Mike Zee aka Dr ZEE
MZE | DZW
  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
need a manual for selectron model 40 tube tester?? prorms Tubes / Valves 1 7th December 2008 08:48 AM
Jackson 637 Tube tester Info needed Zero Cool Tubes / Valves 0 19th September 2008 11:46 PM
Tube tester: Accurate Instruments Model 157 nickds1 Tubes / Valves 0 25th September 2005 05:09 PM
Mercury model 2000 tube tester Christopher Tubes / Valves 4 29th November 2003 07:29 PM


New To Site? Need Help?

All times are GMT. The time now is 10:13 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