In Reply to: Like so???? posted by Bas Horneman on July 2, 2002 at 04:59:45:
...like it ,like it , but there will be no bias 'control' with a 6S19 strapped like this (see my new posting regarding triode bias) . For fixed bias , simply connect the secondary lead of the IT , that is currently connected to 0v to the appropriate negative supply , a stack of lithium cells may be ideal here and avoid another LT transformer . You may have problems with the dissipation of the CCS on top of the 6BX7 if the HT is high , also high voltage transistors may have to be used which usually have low Hfe (current gain) . Why not use a CCS for the first stage (or srpp etc) then resistor anode loading of the 6BX7 . 2nd harmonic cancellation should take place between the 813 and 6BX7 , but may be a pain in practice to implement adequately , but then again , thats helf the fun ! Remember that a CCS loaded stage will only be super-linear with an open circuit load . The 813 is a big valve , therefore probably has big capacitance Cin and miller ....FB
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Follow Ups
- Re: Like so???? - fatbottle 06:37:15 07/02/02 (15)
- Re: Like so???? - Gary P 10:44:17 07/02/02 (1)
- Re: Like so???? - fatbottle 15:06:24 07/02/02 (0)
- Maybe I'll understand better if.. - Bas Horneman 07:32:30 07/02/02 (12)
- Re: Maybe I'll understand better if.. - fatbottle 08:09:31 07/02/02 (11)
- negative supply effort. - Bas Horneman 08:54:29 07/02/02 (3)
- Re: negative supply effort. - Paul Barker 11:58:18 07/02/02 (2)
- Ambitious - Bas Horneman 01:32:04 07/03/02 (1)
- Re: Ambitious - Paul Barker 23:02:46 07/03/02 (0)
- What does your 6C41C sound like? - Bas Horneman 08:39:53 07/02/02 (5)
- Re: What does your 6C41C sound like? - fatbottle 11:19:42 07/02/02 (4)
- Re: What does your 6C41C sound like? - Bas Horneman 01:38:32 07/03/02 (3)
- Re: What does your 6C41C sound like? - fatbottle 06:03:03 07/03/02 (2)
- Re: What does your 6C41C sound like? - J.Bradley 00:58:13 07/04/02 (1)
- Re: What does your 6C41C sound like? - fatbottle 17:43:42 07/04/02 (0)
- 6c41c is almost finished.. - Bas Horneman 08:36:13 07/02/02 (0)