Hi,
Yesterday at a public auction I picked up a really nice condition Mercury Model 2000 Mutual Conductance Tube tester.
Thumbing through the 56 page tube chart, I noticed many tubes listed have no "Rated Gm Micromhos" Data.
I have tested several brand new J&J 6BQ5/EL84's and the Rated Gm of 11000 matches the listing in the tube chart,
But It really leaves me in the dark on tubes like 6L6 that have no Gm listed.
Is there a way of determining this based on the manufacture Tube data?
Needless to say chart updates are not exactly easy to locate.
Trout
Yesterday at a public auction I picked up a really nice condition Mercury Model 2000 Mutual Conductance Tube tester.
Thumbing through the 56 page tube chart, I noticed many tubes listed have no "Rated Gm Micromhos" Data.
I have tested several brand new J&J 6BQ5/EL84's and the Rated Gm of 11000 matches the listing in the tube chart,
But It really leaves me in the dark on tubes like 6L6 that have no Gm listed.
Is there a way of determining this based on the manufacture Tube data?
Needless to say chart updates are not exactly easy to locate.
Trout
Hi Gene,
If the Mercury values agree with other gm listings, then download for a Hickok or the like. The switch settings won't be useful, but you can fill out the gm table.
-Chris
If the Mercury values agree with other gm listings, then download for a Hickok or the like. The switch settings won't be useful, but you can fill out the gm table.
-Chris
11300 is the data sheet value for transconductance for teh 6BQ5 - so the tube tester must have an operating point that gives a similar value... though it's VERY unlikley that it is the data sheet operating point. But as a start, you can use the tube data sheets (and maybe a few NOS examples) for test values.
WAY Cool!
This tester is much better than my other ones, The only drawback being it has no 4 or 5 pin sockets 🙁
But I use mostly 7-8 & 9 pin stuff anyway.
Welp, Now I am off looking for hickok data lol
Trout
This tester is much better than my other ones, The only drawback being it has no 4 or 5 pin sockets 🙁
But I use mostly 7-8 & 9 pin stuff anyway.
Welp, Now I am off looking for hickok data lol
Trout
I recently picked up a Mercury 2000 without a manual or tube chart.
Any chance you can help me out? I would also make these available to others on several tube sites.
Any chance you can help me out? I would also make these available to others on several tube sites.
Hi trout ,
Mercury sold tube testers for a short time .
The Model 2000 is from the year 1967 , when
the unit price was US$ 99.95 .
The Mercury models 1000 , 1200 and 2000 use
the SAME STANDARD Hickock circuit , then
you have to get any Hickock data-sheet , anyway .
Anatech is correct .
SOURCE : Tube Testers and Classic Electronic
Test Gear by ALAN DOUGLAS .
Regards ,
Carlos
Mercury sold tube testers for a short time .
The Model 2000 is from the year 1967 , when
the unit price was US$ 99.95 .
The Mercury models 1000 , 1200 and 2000 use
the SAME STANDARD Hickock circuit , then
you have to get any Hickock data-sheet , anyway .
Anatech is correct .
SOURCE : Tube Testers and Classic Electronic
Test Gear by ALAN DOUGLAS .
Regards ,
Carlos
Cobra2 said:
Arne, I am still a new member and cannot emails others on this board. This is the only board I'm on that does this. Pathetic!
At any rate you may email me: a m j a s AT e a r t h l i n k . n e t
Thank you very much!
Hi,
I have bought a Mercury 2000 tester without any docs, and I need your help.
Could you share your manual with me ??
My email is lklunder3@gmail.com
Thank's in advance
I have bought a Mercury 2000 tester without any docs, and I need your help.
Could you share your manual with me ??
My email is lklunder3@gmail.com
Thank's in advance
Mercury 2000 tester operation manual
Hi,
Thank you for your help.
I have a doubt about how using this tester, I have followed the chart, I have tested some valves and several that I know are in good condition, I expected that the needle mark on the green zone and this remains in the red zone. May be this correct??
I followed the instructions for calibration and adjustment.
I thought that on a good valve, the needle should always mark on the green zone.
Also I do not understand the scale of Em, when this scale be reads high and low scale.
You know about these doubts.
Thanks
Hi,
Thank you for your help.
I have a doubt about how using this tester, I have followed the chart, I have tested some valves and several that I know are in good condition, I expected that the needle mark on the green zone and this remains in the red zone. May be this correct??
I followed the instructions for calibration and adjustment.
I thought that on a good valve, the needle should always mark on the green zone.
Also I do not understand the scale of Em, when this scale be reads high and low scale.
You know about these doubts.
Thanks
The Green and red zones are used on simple emission testers It is not used for Gm measurements.
The Mercury 1000/2000 test sets attempt to measure the tube Gm and display it on the meter which is calibrated in two ranges (low and high). The low scale gives better resolution of measurement below 5000 iirc. This is accomplished by changing the bias on the tube under test.
One has to compare the Gm value called out in the test chart to the value on the display to know if hte tube is good or not.
Green is only used for emission testing such as diodes.
The Mercury 1000/2000 test sets attempt to measure the tube Gm and display it on the meter which is calibrated in two ranges (low and high). The low scale gives better resolution of measurement below 5000 iirc. This is accomplished by changing the bias on the tube under test.
One has to compare the Gm value called out in the test chart to the value on the display to know if hte tube is good or not.
Green is only used for emission testing such as diodes.
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