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In the Forum: Analog Playback
In the Thread: The last phonocorrector: “End of Life" Phonostage
Post Subject: Fixed biasPosted by deemon on: 6/4/2008
Do you mean a battery bias , Brian ? We didn't try it because of 1 V bias voltage - I don't know if the battery with this voltage does exist . I know only 1,5 V and 1,2 V cells ...... maybe using some chemical reactions we can obtain 1 V or little less , but I don't know how to do it ..... Anyhow , if we use a battery in the grid chain - we still need a resistor ( 2 M ) after the coupling capacitor , and we must add 2 contacts of the battery socket and the battery itself . But the fixed bias , as I think , is a more suitable solution in this case - we have the most simply sound chain from the plate of V1 to the grid of V2 , and the short grounded cathode of V2 . I think that it's the best idea ...
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