In Reply to: open wide posted by Joelt on January 3, 2005 at 18:14:37:
I've owned two tube scopes in my life. The crappier one was an old Tek 502 with a plain-jane 12AT7 cathode follower. 500kHz on a good day, drifty, noisy, and not terribly linear. The far better one was an old Tek 545 with a W differential plug-in that used... a cathode follower with a current source load and a voltage bootstrap. Solid. The first scope ended up being stripped for parts, the second sold and probably still being used today.FWIW.
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Follow Ups
- Isn't it ironic... - Mahatma Kane Jeeves 19:16:56 01/03/05 (3)
- Exactly... - Allen Wright 02:48:08 01/05/05 (2)
- Re: Exactly... - Mahatma Kane Jeeves 09:00:44 01/05/05 (0)
- Re: Exactly... - Joelt 04:36:39 01/05/05 (0)