| bequerel |
| I have been thinking about using LEDs to bias a single tube transformer coupled 12B4A linestage. I suppose that the failure rate of LEDs is higher than for a resistor. What happens if the cathode suddenly loses the connection to ground? |
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| analog_sa |
| quote: | | What happens if the cathode suddenly loses the connection to ground? |
Nothing at all. Just no sound. |
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| Geek |
| If the cathode is bypassed with a low voltage, large value electrolytic, you'll hear a loud BANG! ;) |
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| bequerel |
| Thank you for the input guys :-) |
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| Family_Dog |
Well, I had one valve (EL34) in a P-P circuit operating without the cathode resistor for a couple of hours before I noticed it - the prominent lack of emission glow alerted me to the fact! The amplifier still sounded just fine though, using the other half of the P-P circuitry. No damage occurred, but it is not something I like doing...
-Eric |
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