Easily check the Bias and
Balance
on most any vacuum tube amp
Setting the Bias on a
SA-100 Fisher
With 7189 Tubes |
Setting the Bias on a
JMP MK2
With EL34 Tubes "Valves"
Note
improper bias setting
from previous tube set |
Fender® Marshall®
Peavy® Laney® Fisher® Dynaco® DIY
Guitar, JukeBox,
Monoblock, Stereo Amps and more
See tube compatability for each probe.
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PLACES TO
VISIT
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ACCURATELY CHECK AND ADJUST
PROPER OUTPUT TUBE BIAS AND BALANCE
IF YOU HAVE A TUBE TYPE AMP THIS TOOL IS
INDISPENSABLE
MAKES SIMPLE BIAS PROBES
OBSOLETE
- ACCURATELY DISPLAYS PLATE
VOLTAGE
ACCURATELY DISPLAYS CATHODE CURRENT
ACCURATELY
DISPLAYS CALCULATED WATTAGE
AUTOMATICALLY FOR UP TO 2 TUBES
- DIRECT READING SIMPLY SET THE
BIAS FOR PROPER DISSIPATION / BALANCE AND YOU ARE DONE
- A BETTER VALUE THAN SIMPLE
PROBES
- SELECT YOUR OWN BIAS PROBE
CONFIGURATION
OCTAL, NOVAL (9 PIN) OR BOTH
- WORKS WITH AC OR DC
FILAMENTS
- DON'T HACK UP A VINTAGE VACUUM
TUBE AMP JUST TO CHECK BIAS OR BALANCE
- INDESPENSIBLE TOOL FOR HI-FI,
GUITAR, JUKEBOX OR JUST ABOUT ANY TUBE AMP
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Click here to read more
comments:
"It's actually a little RISC-based computer that measures the tube's plate voltage and Idle cathode current
real-time and calculates the output tube dissipation wattage. I was skeptical but it met most of my criteria.....
I've been having troubles with my Vibrolux, so I slapped on the probes (I got the Octal and Noval probe set) and was
surprised but relieved to see some odd readings: plate voltage was around 415-417 for both but idle current were 15 and 31,
wattage was 6.2 and 12.9...Clearly 1 tube was not performing within bounds and the bias currents were wacked....
The Compu-Bias gave me quick readings and I didn't have to measure anything inside the chassis...
It may be a little pricier compared to some of the other units but the convenience and software upgradability make it a workable tool for me....
"
Joe C 03-08-07
OCTAL ADAPTOR
PROBE
WORKS WITH
MOST ANY 7AC, 8EP TUBE BASE
6K6
6V6
6L6
EL34
KT66
|
KT88
KT90
5881
6550
+
MORE |
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NOVAL ADAPTOR
PROBE
WORKS WITH
MOST ANY 9CV TUBE BASE
6BQ5
7189
6P14
6P15 |
EL84
7320
10BQ5
10P18
+
MORE |
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WATT PROBE
POWER
INTO 2,4,8,16 OHMS |
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