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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: Re: Any problem when much higher load for input tube ? posted by drlowmu on April 11, 2007 at 06:59:47:
Hello Doctor,More for you. Use this calculator posted below to compute bypass caps.
220 uF across 750 ohms is .96 HZ !! Unnecessary.
I'd do about a 25 uF high quality film cap across the 750 ohm input stage's Rk, and a 8-10 uF high quality film cap across the 2A3 stage's 3,200 ohm Rk.
Email me privately for suggestions as to actual cap choices there. Quality and execution matters there.
Be sure to USE the multiple litz technique on these film caps' lead-outs - as I've posted on-Forum, earlier this month or last, for max fidelity.
Normally, seek to obtain under 8 HZ, in the 4-8 HZ range is OK, and you do not want the SAME HZ for each stage, to avoid stacking at the same frequency.
Your internal wire choices and lay-out will be ultra-CRITICAL in this SE design's execution.
Hope this helps you.
Jeff Medwin
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Follow Ups
- Your bypass C's - drlowmu 07:33:24 04/11/07 (13)
- Re: Your bypass C's - ychungmd 03:54:19 04/12/07 (0)
- Re: Your bypass C's - Tre' 14:25:06 04/11/07 (11)
- Re: Your bypass C's - dave slagle 06:29:43 04/12/07 (9)
- Re: Your bypass C's - Tre' 09:51:58 04/12/07 (8)
- Re: Your bypass C's - dave slagle 10:29:50 04/12/07 (3)
- Re: Your bypass C's - mqracing 10:45:47 04/12/07 (2)
- also consider.... - mqracing 10:51:25 04/12/07 (1)
- Re: also consider.... - drlowmu 13:48:58 04/12/07 (0)
- Re: Your bypass C's - mqracing 10:28:34 04/12/07 (3)
- Re: Your bypass C's - Tre' 18:01:48 04/12/07 (2)
- Re: Your bypass C's - mqracing 18:37:42 04/12/07 (1)
- My bad - Tre' 19:11:32 04/12/07 (0)
- Re: Your bypass C's - drlowmu 16:02:33 04/11/07 (0)
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