I am looking for settings for my Western Electric KS-15560-L1 tube tester. for the D3A and 5687. The settings in the available in the Experimental Tube Data Excel file spreadsheet don't seem to work. The filament lights up but nothing happens when tested.
D3A
Filament = 6.3
Selectors = EV2791-1
Bias = 12
English = 90
Press - P1
5687 Triode 1
Filament = 12.6
Selectors = EV7906-1
Bias = 23
LoSig
Press - P4
5687 Triode 2
Filament = 12.6
Selectors = EV2103-9
Bias = 23
LoSig
Press - P4
Any help would be appreciated.
D3A
Filament = 6.3
Selectors = EV2791-1
Bias = 12
English = 90
Press - P1
5687 Triode 1
Filament = 12.6
Selectors = EV7906-1
Bias = 23
LoSig
Press - P4
5687 Triode 2
Filament = 12.6
Selectors = EV2103-9
Bias = 23
LoSig
Press - P4
Any help would be appreciated.
The BAMA archive has the roll chart and the 5687 is listed. https://bama.edebris.com/manuals/hickok/ks15560/
Where can the Experimental Tube Data Excel file be found?
Also where is data on the D3A?
Where can the Experimental Tube Data Excel file be found?
Also where is data on the D3A?
Maybe this will help? I have a Hickok 1575B which looks exactly like a KS-15560 and has the extra cathode resistors above the main meter.
I suspect you are biasing the tubes too high, near or at cutoff.
The settings for a 5687 are as follows.
Settings EV7906-0 then EV2103-0
Bias is 5v
Function/shunt is Lo-15
Transconductance is 5100
The Hickok 539B/C has selectors set like yours. (EV7906-1 & EV2103-9)
Same 5v bias & conductance "C" 4800
My 1575B doesn't list a D3A, (aka, 7721) but the 539s do.
EV2791-8
Bias 1v & conductance "B" 6300
I suspect you are biasing the tubes too high, near or at cutoff.
The settings for a 5687 are as follows.
Settings EV7906-0 then EV2103-0
Bias is 5v
Function/shunt is Lo-15
Transconductance is 5100
The Hickok 539B/C has selectors set like yours. (EV7906-1 & EV2103-9)
Same 5v bias & conductance "C" 4800
My 1575B doesn't list a D3A, (aka, 7721) but the 539s do.
EV2791-8
Bias 1v & conductance "B" 6300