Military projector amp - speaker distorting/overworked

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Bieworm
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Re: Military projector amp - speaker distorting/overworked

Post by Bieworm »

Was planning to do that...

Ok, go to robrobinette.com tube bias calculator
Select tube type
Fill in plate to cathode voltage (=value when you subtract the cathode voltage from plate voltage)
Press calculate
Scroll down a little
Fill in number of tubes that share the cathode resistor
Fill in cathode voltage
Fill in cathode resistor value
Press enter
Look at the results
2 x
"THIS should be played at high volume..preferably in a residential area"

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yello
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Re: Military projector amp - speaker distorting/overworked

Post by yello »

JMPGuitars wrote:
Wed 05/04/22 5:53 am
Tell him how you figured that out so he can do it. 😉
Bieworm wrote:
Wed 05/04/22 9:13 am
Was planning to do that...

Ok, go to robrobinette.com tube bias calculator
Select tube type
Fill in plate to cathode voltage (=value when you subtract the cathode voltage from plate voltage)
Press calculate
Scroll down a little
Fill in number of tubes that share the cathode resistor
Fill in cathode voltage
Fill in cathode resistor value
Press enter
Look at the results
Perfect, thank you. That is the calculator I had tried, but hadn't put the numbers in right. I now get the same 90% result.

Getting close, just need to work on the input jack area.
2 x

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