811A setup on Jackson 648a tubes tester

10/26/2002 2:13:00 PMPascal

Hi
Can somebody help me please.
Thanks
PAscal

10/26/2002 4:17:50 PMNorm Leal

Hi Pascal

811A is a transmitting triode. It has a 6.3 volt @ 4 amp filament on pins #1 & #4. Pin #3 is grid. Plate is top cap. Although your tester was made for receiving tubes you should be able to test an 811A knowing the operation of your tester and above pins.

Don't keep an 811A under test very long. It draws more filament & plate current than receiving tubes.

Norm

:Hi
:Can somebody help me please.
:Thanks
:PAscal

10/26/2002 6:11:40 PMJohn McPherson

Hi,
On the 648, if you need the information on which buttons:
Filament, as Norm said, is 6.3 volts. Try not to keep this tube on the tester for any length of time longer than needed for testing as the transformer in the 648 is at it's limit with this tube.
Bank A- 1,4
Bank B- 2,9
Load- Not sure, try a setting of 10, I forget what plate load resistance it has, but with the plate voltage of the Jackson tester, you may not be in the linear portion of the response curve for the tube, but you can get some idea of if the tube can still be put in service.

The tube specs can be found here:
http://www.wps.com/archives/tube-datasheets/Datasheets/Raytheon-SP-7106-1260-20M/4.JPG
http://www.wps.com/archives/tube-datasheets/Datasheets/Raytheon-SP-7106-1260-20M/5.JPG
These are large files, so be patient.

Nostalgia air does not have the specs online for this tube.

:Hi Pascal
:
: 811A is a transmitting triode. It has a 6.3 volt @ 4 amp filament on pins #1 & #4. Pin #3 is grid. Plate is top cap. Although your tester was made for receiving tubes you should be able to test an 811A knowing the operation of your tester and above pins.
:
: Don't keep an 811A under test very long. It draws more filament & plate current than receiving tubes.
:
:Norm
:
::Hi
::Can somebody help me please.
::Thanks
::PAscal

10/26/2002 6:33:29 PMJohn McPherson :Important correction to my initial reply:

:Hi,
:On the 648, if you need the information on which buttons:
:Filament, as Norm said, is 6.3 volts. Try not to keep this tube on the tester for any length of time longer than needed for testing as the transformer in the 648 is at it's limit with this tube.
:Bank A- 1,4
:Bank B- 2,9
:Load- Not sure, try a setting of 10, I forget what plate load resistance it has, but with the plate voltage of the Jackson tester, you may not be in the linear portion of the response curve for the tube, but you can get some idea of if the tube can still be put in service.
:
:The tube specs can be found here:
:http://www.wps.com/archives/tube-datasheets/Datasheets/Raytheon-SP-7106-1260-20M/4.JPG
:http://www.wps.com/archives/tube-datasheets/Datasheets/Raytheon-SP-7106-1260-20M/5.JPG
:These are large files, so be patient.
:
:Nostalgia air does not have the specs online for this tube.
:
:
:
::Hi Pascal
::
:: 811A is a transmitting triode. It has a 6.3 volt @ 4 amp filament on pins #1 & #4. Pin #3 is grid. Plate is top cap. Although your tester was made for receiving tubes you should be able to test an 811A knowing the operation of your tester and above pins.
::
:: Don't keep an 811A under test very long. It draws more filament & plate current than receiving tubes.
::
::Norm
::
:::Hi
:::Can somebody help me please.
:::Thanks
:::PAscal

10/26/2002 6:42:18 PMThe correction, keyboard is not responding correctly:

My keybaord sent the previous reply merely because the keyboard flexed.

in any event, below are the settings that should produce readings.

The button settings should be:
Filament- 6.3
Bank A- 1,2
Bank B- 3,9
Load- 10 is fair guess
As for which of the 6 buttons for test, W is likely best,otherwise, try V.

::Hi,
::On the 648, if you need the information on which buttons:
::Filament, as Norm said, is 6.3 volts. Try not to keep this tube on the tester for any length of time longer than needed for testing as the transformer in the 648 is at it's limit with this tube.
::Bank A- 1,4
::Bank B- 2,9
::Load- Not sure, try a setting of 10, I forget what plate load resistance it has, but with the plate voltage of the Jackson tester, you may not be in the linear portion of the response curve for the tube, but you can get some idea of if the tube can still be put in service.
::
::The tube specs can be found here:
::http://www.wps.com/archives/tube-datasheets/Datasheets/Raytheon-SP-7106-1260-20M/4.JPG
::http://www.wps.com/archives/tube-datasheets/Datasheets/Raytheon-SP-7106-1260-20M/5.JPG
::These are large files, so be patient.
::
::Nostalgia air does not have the specs online for this tube.
::
::
::
:::Hi Pascal
:::
::: 811A is a transmitting triode. It has a 6.3 volt @ 4 amp filament on pins #1 & #4. Pin #3 is grid. Plate is top cap. Although your tester was made for receiving tubes you should be able to test an 811A knowing the operation of your tester and above pins.
:::
::: Don't keep an 811A under test very long. It draws more filament & plate current than receiving tubes.
:::
:::Norm
:::
::::Hi
::::Can somebody help me please.
::::Thanks
::::PAscal

10/26/2002 9:13:38 PMPascal

Thanks
Pascal