I recently acquired this EICO-666 tube tester, and after some much needed repairs and cleaning it seems to work well ...at least with the many tubes I tried in it.
However there is nothing on the roll chart for some older tubes. I wonder why? Especially as it has sockets for them. And since it's touted to be able to test the older tubes this puzzles me...
....(but then many things seem to puzzle me)
Anyway.. I want to test a 25Z5 and a 75 and a 43... but there's nothing on the roll chart for them.
Does anyone have the setup info for these 3 tubes?
And/or can you steer me to a site to download any suplement sheets that would include the older tubes?

Is the 666 anything like the 625? It must have the same tube pin and selector switches and the same resistance values for the selector switch if it is to be considered the same electrically. If so, there is an update on this web site for the 625. Perhaps you can use these settings for the 666. With some tubes like the #42, you can substitute the selector and shunt settings for the 6F6. These tubes are almost identical in construction. The #41 is identical to a 6K6 tube. Same with the #80 vs. the 5Y3.

I don't know what is comparable with the 25Z5. I suppose the 117Z6 might compare, though cathode spacing and emission may be slightly different. Both are rectifiers for 110 volt operation in AC-DC radios. I don't have my tube manual handy, but I think they both have similar current limitations. Obviously one has a 25 volt filament and one has a 117 volt filament.

The #43 tube may be similar to the 25L6, though the 25L6 is a beam power tube. I don't know if the 43 is a beam power tube or simply a 3 screen grid type tube.

I think that a #75 tube is similar to a 6Q7. An 84/6Z4 is the same thing as a 6X5. A 78 may or may not be similar to a 6U7. The 6K7 is similar to the 6U7, but has a bit more gain. If you have a tube manual handy, you can make electrical comparisons. You can use this information for deciding which tubes are identical electrically to others. Then you can use the settings given in your tube tester roll chart for tubes which are not given in the roll chart.

Thomas

Hi Peter

I have the EICO 666 obsolete setup charts in my computer. I can send them but need your email address. You didn't include it in your post.

What Thomas mentioned is correct but it does take figuring out different tube pinouts.

Norm

:Is the 666 anything like the 625? It must have the same tube pin and selector switches and the same resistance values for the selector switch if it is to be considered the same electrically. If so, there is an update on this web site for the 625. Perhaps you can use these settings for the 666. With some tubes like the #42, you can substitute the selector and shunt settings for the 6F6. These tubes are almost identical in construction. The #41 is identical to a 6K6 tube. Same with the #80 vs. the 5Y3.
:
:I don't know what is comparable with the 25Z5. I suppose the 117Z6 might compare, though cathode spacing and emission may be slightly different. Both are rectifiers for 110 volt operation in AC-DC radios. I don't have my tube manual handy, but I think they both have similar current limitations. Obviously one has a 25 volt filament and one has a 117 volt filament.
:
:The #43 tube may be similar to the 25L6, though the 25L6 is a beam power tube. I don't know if the 43 is a beam power tube or simply a 3 screen grid type tube.
:
:I think that a #75 tube is similar to a 6Q7. An 84/6Z4 is the same thing as a 6X5. A 78 may or may not be similar to a 6U7. The 6K7 is similar to the 6U7, but has a bit more gain. If you have a tube manual handy, you can make electrical comparisons. You can use this information for deciding which tubes are identical electrically to others. Then you can use the settings given in your tube tester roll chart for tubes which are not given in the roll chart.
:
:Thomas

thanks a BUNCH Norm...
Peter@Pbpix.com

Peter

Information sent.

Norm

:thanks a BUNCH Norm...
:Peter@Pbpix.com
:

OK Norm.. thanks for taking the time to dig it out and email it.
That was very generous!
It seems to have exactly what I need. I'll go test the questionable tubes now this afternoon.

These can also be downloaded from Bama http://bama.edebris.com/manuals/eico/666/

Dave

Thanks so much Dave.. I got it ...did it.. I truly appreciate that!

:Hi Peter
:
: I have the EICO 666 obsolete setup charts in my computer. I can send them but need your email address. You didn't include it in your post.
:
: What Thomas mentioned is correct but it does take figuring out different tube pinouts.
:
:Norm
:
::Is the 666 anything like the 625? It must have the same tube pin and selector switches and the same resistance values for the selector switch if it is to be considered the same electrically. If so, there is an update on this web site for the 625. Perhaps you can use these settings for the 666. With some tubes like the #42, you can substitute the selector and shunt settings for the 6F6. These tubes are almost identical in construction. The #41 is identical to a 6K6 tube. Same with the #80 vs. the 5Y3.
::
::I don't know what is comparable with the 25Z5. I suppose the 117Z6 might compare, though cathode spacing and emission may be slightly different. Both are rectifiers for 110 volt operation in AC-DC radios. I don't have my tube manual handy, but I think they both have similar current limitations. Obviously one has a 25 volt filament and one has a 117 volt filament.
::
::The #43 tube may be similar to the 25L6, though the 25L6 is a beam power tube. I don't know if the 43 is a beam power tube or simply a 3 screen grid type tube.
::
::I think that a #75 tube is similar to a 6Q7. An 84/6Z4 is the same thing as a 6X5. A 78 may or may not be similar to a 6U7. The 6K7 is similar to the 6U7, but has a bit more gain. If you have a tube manual handy, you can make electrical comparisons. You can use this information for deciding which tubes are identical electrically to others. Then you can use the settings given in your tube tester roll chart for tubes which are not given in the roll chart.
::
::Thomas
HI NORM.I FOUND THIS OLD POST IN THE FORUMS AND WAS WONDERING IF YOU STILL HAVE THE EICO 666 OBSOLETE SETUP CHARTS IN YOUR COMPUTER.MY CHARTS DO NOT SHOW (26,27,171-A,80)IF YOU RECIEVE THIS E-MAIL THANK YOU SO MUCH.
JIM

Hi Jim

The same information can be found here:

http://bama.edebris.com/manuals/eico/666/charts-05

If you have problems I can send you a copy.

Norm

::Hi Peter
::
:: I have the EICO 666 obsolete setup charts in my computer. I can send them but need your email address. You didn't include it in your post.
::
:: What Thomas mentioned is correct but it does take figuring out different tube pinouts.
::
::Norm
::
:::Is the 666 anything like the 625? It must have the same tube pin and selector switches and the same resistance values for the selector switch if it is to be considered the same electrically. If so, there is an update on this web site for the 625. Perhaps you can use these settings for the 666. With some tubes like the #42, you can substitute the selector and shunt settings for the 6F6. These tubes are almost identical in construction. The #41 is identical to a 6K6 tube. Same with the #80 vs. the 5Y3.
:::
:::I don't know what is comparable with the 25Z5. I suppose the 117Z6 might compare, though cathode spacing and emission may be slightly different. Both are rectifiers for 110 volt operation in AC-DC radios. I don't have my tube manual handy, but I think they both have similar current limitations. Obviously one has a 25 volt filament and one has a 117 volt filament.
:::
:::The #43 tube may be similar to the 25L6, though the 25L6 is a beam power tube. I don't know if the 43 is a beam power tube or simply a 3 screen grid type tube.
:::
:::I think that a #75 tube is similar to a 6Q7. An 84/6Z4 is the same thing as a 6X5. A 78 may or may not be similar to a 6U7. The 6K7 is similar to the 6U7, but has a bit more gain. If you have a tube manual handy, you can make electrical comparisons. You can use this information for deciding which tubes are identical electrically to others. Then you can use the settings given in your tube tester roll chart for tubes which are not given in the roll chart.
:::
:::Thomas
:HI NORM.I FOUND THIS OLD POST IN THE FORUMS AND WAS WONDERING IF YOU STILL HAVE THE EICO 666 OBSOLETE SETUP CHARTS IN YOUR COMPUTER.MY CHARTS DO NOT SHOW (26,27,171-A,80)IF YOU RECIEVE THIS E-MAIL THANK YOU SO MUCH.
:JIM
:

Is this data valid for the Eico 625? Thanks.

Hi Gary

EICO 625 data is available here:

http://bama.edebris.com/manuals/eico/625data/

Norm

:Is this data valid for the Eico 625? Thanks.
: