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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: 27 preamp posted by Ronald K. on February 25, 2007 at 00:46:09:
I agree with Chris O, a lack of bass slam does not normally make me think of the operating point as the culprit, at least in a preamp.I have not played with the 27 much, but have played with its relatives, the 37, 56, and 76, and now the 26. My view is to run a decent amount of current through them -- your 4 ma would qualify -- and have an operating point that can handle your input signal without clipping. I would gravitate toward your 150v set up myself.
Although it has no bearing on your bass slam, how are you powering the heater? Series connected AC from a 5V winding?
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Follow Ups
- Re: 27 preamp - Perseo 07:17:05 02/25/07 (6)
- Re: 27 preamp - Ronald K. 09:24:14 02/25/07 (5)
- Re: 27 preamp - passenger 14:22:18 02/26/07 (3)
- Re: 27 preamp - Ronald K. 16:28:15 02/26/07 (2)
- Re: 27 preamp - passenger 14:35:51 02/27/07 (1)
- Re: 27 preamp - Ronald K. 16:22:19 02/27/07 (0)
- Re: 27 preamp - Perseo 13:15:13 02/25/07 (0)
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