Is a Plate voltage of 395 too high for Cathode bias push pull pair of 6V6GTs? Schematic says 340 But Mine is home made. Ahy suggestions? Everywhere I look it's around 315 in books. Am I pushing it?

Bubba

:Hi Bubba
The design MAXIMUM plate voltage for the 6V6GT is 350. You can assume a 10% tolerance in any tube circuit design, which would put you at 385.

There are other factors to consider like plate current and power dissipation but in my opinion if you are running the tube at 395 it may be on borrowed time.

Gary

:Is a Plate voltage of 395 too high for Cathode bias push pull pair of 6V6GTs? Schematic says 340 But Mine is home made. Ahy suggestions? Everywhere I look it's around 315 in books. Am I pushing it?
:
:Bubba

Hi

Agree voltage is high but not quite as bad as first seen. With cathode bias voltage would be a little less. Actual voltage across your tube should be measured from cathode to plate.

Might consider 6L6GC? Basing is the same but rated for higher voltage.

Norm

::Hi Bubba
:The design MAXIMUM plate voltage for the 6V6GT is 350. You can assume a 10% tolerance in any tube circuit design, which would put you at 385.
:
:There are other factors to consider like plate current and power dissipation but in my opinion if you are running the tube at 395 it may be on borrowed time.
:
:Gary
:
::Is a Plate voltage of 395 too high for Cathode bias push pull pair of 6V6GTs? Schematic says 340 But Mine is home made. Ahy suggestions? Everywhere I look it's around 315 in books. Am I pushing it?
::
::Bubba

Well then the cathode is @ 23V as on the schematic and the Plates at 395. So does that mean actual is 372. It IS a guitar amp as well. What do you suggest to bring it down?

Brian

:Hi
:
: Agree voltage is high but not quite as bad as first seen. With cathode bias voltage would be a little less. Actual voltage across your tube should be measured from cathode to plate.
:
: Might consider 6L6GC? Basing is the same but rated for higher voltage.
:
:Norm
:
:::Hi Bubba
::The design MAXIMUM plate voltage for the 6V6GT is 350. You can assume a 10% tolerance in any tube circuit design, which would put you at 385.
::
::There are other factors to consider like plate current and power dissipation but in my opinion if you are running the tube at 395 it may be on borrowed time.
::
::Gary
::
:::Is a Plate voltage of 395 too high for Cathode bias push pull pair of 6V6GTs? Schematic says 340 But Mine is home made. Ahy suggestions? Everywhere I look it's around 315 in books. Am I pushing it?
:::
:::Bubba

I wish I could see a schematic of what you are building (with all specifications). You want to be able to safely distort the amplifier and enjoy it, not blow it up. Have you played your amp. yet? Does it sound good? I assume it is push pull.

:Well I'll see how it goes and how long these tubes last pushed this hard. Guitar amplifiers and pushing tubes to their max are a good mix. I wouldn;t do it on a home stereo or radio setup but guitar amps need to run hot and distorted... Plus tubes are very tough and can often run a little higher than spec...
:
:
:::Is a Plate voltage of 395 too high for Cathode bias push pull pair of 6V6GTs? Schematic says 340 But Mine is home made. Ahy suggestions? Everywhere I look it's around 315 in books. Am I pushing it?
:::
:::Bubba
::
::Bubba: I agree that the plate voltage is too high for reliable service from your 6V6's. The best way to lower the voltage is to lift the center tap power transformer wire (probably red/yellow) from ground and use a 70 volt, 10 watt zener diode in series with this wire to ground. This would drop 70 volts and maintain excellent power supply regulation. You could do the same using a resistor, however, the regulation would suffer markedly. YOU WILL NEED TO HEAT SINK THE ZENER TO THE CHASSIS!!

...........I forgot, it is push-pull.
:I wish I could see a schematic of what you are building (with all specifications). You want to be able to safely distort the amplifier and enjoy it, not blow it up. Have you played your amp. yet? Does it sound good? I assume it is push pull.
:
::Well I'll see how it goes and how long these tubes last pushed this hard. Guitar amplifiers and pushing tubes to their max are a good mix. I wouldn;t do it on a home stereo or radio setup but guitar amps need to run hot and distorted... Plus tubes are very tough and can often run a little higher than spec...
::
::
::::Is a Plate voltage of 395 too high for Cathode bias push pull pair of 6V6GTs? Schematic says 340 But Mine is home made. Ahy suggestions? Everywhere I look it's around 315 in books. Am I pushing it?
::::
::::Bubba
:::
:::Bubba: I agree that the plate voltage is too high for reliable service from your 6V6's. The best way to lower the voltage is to lift the center tap power transformer wire (probably red/yellow) from ground and use a 70 volt, 10 watt zener diode in series with this wire to ground. This would drop 70 volts and maintain excellent power supply regulation. You could do the same using a resistor, however, the regulation would suffer markedly. YOU WILL NEED TO HEAT SINK THE ZENER TO THE CHASSIS!!

Well I'll see how it goes and how long these tubes last pushed this hard. Guitar amplifiers and pushing tubes to their max are a good mix. I wouldn;t do it on a home stereo or radio setup but guitar amps need to run hot and distorted... Plus tubes are very tough and can often run a little higher than spec...

::Is a Plate voltage of 395 too high for Cathode bias push pull pair of 6V6GTs? Schematic says 340 But Mine is home made. Ahy suggestions? Everywhere I look it's around 315 in books. Am I pushing it?
::
::Bubba
:
:Bubba: I agree that the plate voltage is too high for reliable service from your 6V6's. The best way to lower the voltage is to lift the center tap power transformer wire (probably red/yellow) from ground and use a 70 volt, 10 watt zener diode in series with this wire to ground. This would drop 70 volts and maintain excellent power supply regulation. You could do the same using a resistor, however, the regulation would suffer markedly. YOU WILL NEED TO HEAT SINK THE ZENER TO THE CHASSIS!!

I wish I could see a schematic of what you are building (with all specifications). You want to be able to safely distort the amplifier and enjoy it, not blow it up. Have you played your amp. yet? Does it sound good? I assume it is push pull.

:Well I'll see how it goes and how long these tubes last pushed this hard. Guitar amplifiers and pushing tubes to their max are a good mix. I wouldn;t do it on a home stereo or radio setup but guitar amps need to run hot and distorted... Plus tubes are very tough and can often run a little higher than spec...
:
:
:::Is a Plate voltage of 395 too high for Cathode bias push pull pair of 6V6GTs? Schematic says 340 But Mine is home made. Ahy suggestions? Everywhere I look it's around 315 in books. Am I pushing it?
:::
:::Bubba
::
::Bubba: I agree that the plate voltage is too high for reliable service from your 6V6's. The best way to lower the voltage is to lift the center tap power transformer wire (probably red/yellow) from ground and use a 70 volt, 10 watt zener diode in series with this wire to ground. This would drop 70 volts and maintain excellent power supply regulation. You could do the same using a resistor, however, the regulation would suffer markedly. YOU WILL NEED TO HEAT SINK THE ZENER TO THE CHASSIS!!

...........I forgot, it is push-pull.
:I wish I could see a schematic of what you are building (with all specifications). You want to be able to safely distort the amplifier and enjoy it, not blow it up. Have you played your amp. yet? Does it sound good? I assume it is push pull.
:
::Well I'll see how it goes and how long these tubes last pushed this hard. Guitar amplifiers and pushing tubes to their max are a good mix. I wouldn;t do it on a home stereo or radio setup but guitar amps need to run hot and distorted... Plus tubes are very tough and can often run a little higher than spec...
::
::
::::Is a Plate voltage of 395 too high for Cathode bias push pull pair of 6V6GTs? Schematic says 340 But Mine is home made. Ahy suggestions? Everywhere I look it's around 315 in books. Am I pushing it?
::::
::::Bubba
:::
:::Bubba: I agree that the plate voltage is too high for reliable service from your 6V6's. The best way to lower the voltage is to lift the center tap power transformer wire (probably red/yellow) from ground and use a 70 volt, 10 watt zener diode in series with this wire to ground. This would drop 70 volts and maintain excellent power supply regulation. You could do the same using a resistor, however, the regulation would suffer markedly. YOU WILL NEED TO HEAT SINK THE ZENER TO THE CHASSIS!!

:Is a Plate voltage of 395 too high for Cathode bias push pull pair of 6V6GTs? Schematic says 340 But Mine is home made. Ahy suggestions? Everywhere I look it's around 315 in books. Am I pushing it?
:
:Bubba

Bubba: I agree that the plate voltage is too high for reliable service from your 6V6's. The best way to lower the voltage is to lift the center tap power transformer wire (probably red/yellow) from ground and use a 70 volt, 10 watt zener diode in series with this wire to ground. This would drop 70 volts and maintain excellent power supply regulation. You could do the same using a resistor, however, the regulation would suffer markedly. YOU WILL NEED TO HEAT SINK THE ZENER TO THE CHASSIS!!

Well I'll see how it goes and how long these tubes last pushed this hard. Guitar amplifiers and pushing tubes to their max are a good mix. I wouldn;t do it on a home stereo or radio setup but guitar amps need to run hot and distorted... Plus tubes are very tough and can often run a little higher than spec...

::Is a Plate voltage of 395 too high for Cathode bias push pull pair of 6V6GTs? Schematic says 340 But Mine is home made. Ahy suggestions? Everywhere I look it's around 315 in books. Am I pushing it?
::
::Bubba
:
:Bubba: I agree that the plate voltage is too high for reliable service from your 6V6's. The best way to lower the voltage is to lift the center tap power transformer wire (probably red/yellow) from ground and use a 70 volt, 10 watt zener diode in series with this wire to ground. This would drop 70 volts and maintain excellent power supply regulation. You could do the same using a resistor, however, the regulation would suffer markedly. YOU WILL NEED TO HEAT SINK THE ZENER TO THE CHASSIS!!

I wish I could see a schematic of what you are building (with all specifications). You want to be able to safely distort the amplifier and enjoy it, not blow it up. Have you played your amp. yet? Does it sound good? I assume it is push pull.

:Well I'll see how it goes and how long these tubes last pushed this hard. Guitar amplifiers and pushing tubes to their max are a good mix. I wouldn;t do it on a home stereo or radio setup but guitar amps need to run hot and distorted... Plus tubes are very tough and can often run a little higher than spec...
:
:
:::Is a Plate voltage of 395 too high for Cathode bias push pull pair of 6V6GTs? Schematic says 340 But Mine is home made. Ahy suggestions? Everywhere I look it's around 315 in books. Am I pushing it?
:::
:::Bubba
::
::Bubba: I agree that the plate voltage is too high for reliable service from your 6V6's. The best way to lower the voltage is to lift the center tap power transformer wire (probably red/yellow) from ground and use a 70 volt, 10 watt zener diode in series with this wire to ground. This would drop 70 volts and maintain excellent power supply regulation. You could do the same using a resistor, however, the regulation would suffer markedly. YOU WILL NEED TO HEAT SINK THE ZENER TO THE CHASSIS!!

...........I forgot, it is push-pull.
:I wish I could see a schematic of what you are building (with all specifications). You want to be able to safely distort the amplifier and enjoy it, not blow it up. Have you played your amp. yet? Does it sound good? I assume it is push pull.
:
::Well I'll see how it goes and how long these tubes last pushed this hard. Guitar amplifiers and pushing tubes to their max are a good mix. I wouldn;t do it on a home stereo or radio setup but guitar amps need to run hot and distorted... Plus tubes are very tough and can often run a little higher than spec...
::
::
::::Is a Plate voltage of 395 too high for Cathode bias push pull pair of 6V6GTs? Schematic says 340 But Mine is home made. Ahy suggestions? Everywhere I look it's around 315 in books. Am I pushing it?
::::
::::Bubba
:::
:::Bubba: I agree that the plate voltage is too high for reliable service from your 6V6's. The best way to lower the voltage is to lift the center tap power transformer wire (probably red/yellow) from ground and use a 70 volt, 10 watt zener diode in series with this wire to ground. This would drop 70 volts and maintain excellent power supply regulation. You could do the same using a resistor, however, the regulation would suffer markedly. YOU WILL NEED TO HEAT SINK THE ZENER TO THE CHASSIS!!