In Reply to: Are you sure? posted by jellobrain on January 17, 2001 at 10:20:48:
V=IR
Voltage = current * resistanceOhm's Law, not Ohm's request. What does it mean here?
Well, if you seperate the two tubes, only half the DC current (compared to the original schematic) is going through each cathode circuit. To get the same voltage drop you originally desired (as in the article's shared-transformer schematic) you would need to use double the resistance.
V=I*R
V=(1/2I)*(2R)As it stands you have the single current running through the original resistance value = (1/2I)*R.
This resistor sets the bias for the tube and your tube appears to biased incorrectly as a result. I would have expected loud, distorted sound, not quiet sound, to be the result, but let's get it biased right and see how it goes.
Very simple fix. Cut out one of the resistors per channel, leaving one 1.5K resistor per channel. Enjoy!
Double check your wiring, I am suspicious that you may have lost some of the signal somewhere.
-j
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Follow Ups
- Re: Are you sure? - J Epstein 01/17/0111:11:49 01/17/01 (23)
- Another dumb question - jellobrain 09:46:11 01/18/01 (20)
- Theoretically speaking, - Quest 11:26:47 01/18/01 (19)
- Re: Theoretically speaking, - J Epstein 12:02:50 01/18/01 (18)
- A suspicious voltage! - jellobrain 17:18:44 01/18/01 (17)
- Re: A suspicious voltage! - J Epstein 21:17:28 01/18/01 (16)
- Re: A suspicious voltage! - jellobrain 03:55:28 01/19/01 (14)
- That's all OK - J Epstein 05:53:53 01/19/01 (13)
- I don't know yet - jellobrain 09:54:37 01/19/01 (12)
- Latest update - jellobrain 17:20:17 01/19/01 (11)
- Re: Latest update - J Epstein 07:02:07 01/20/01 (10)
- FINALLY SOMETHING! - jellobrain 11:46:40 01/20/01 (9)
- Re: FINALLY SOMETHING! - J Epstein 12:51:16 01/20/01 (8)
- checking voltage - jellobrain 13:38:03 01/20/01 (7)
- Re: checking voltage - J Epstein 14:18:10 01/21/01 (5)
- My only recourse - jellobrain 17:12:30 01/21/01 (4)
- Re: My only recourse - J Epstein 18:24:12 01/21/01 (3)
- The follies of first time DIYing - jellobrain 12:02:56 01/22/01 (0)
- The follies of first time DIYing - jellobrain 10:58:57 01/22/01 (1)
- Well, the good thing is: - J Epstein 12:34:40 01/22/01 (0)
- Can any of you "experts" enlighten me? - jellobrain 10:22:00 01/21/01 (0)
- here's the schemo and pinouts for 45/2A3 - J Epstein 21:42:16 01/18/01 (0)
- J.Epstein is right - Quest 12:00:17 01/17/01 (0)
- typo - J Epstein 11:14:12 01/17/01 (0)