| Author: | Paul Fawcett (registered user: 2924 posts ) |
| Date: | Wed, Feb 29th, 2012 @ 08:43 ( . ) |
On 02/29/2012 @ 08:11, Zozobra wrote :
I've updated the schematic with a few tweaks: : Corrected the bias circuit : Decreased the bleeder/balancing to 220k such that the sum of R20/21 is less than 10xR27 as per Merlins suggestion. : Added the power switching/fusing to the diagram including an inrush reduction standby. : : [link] : This is the same location as the old diagram so any previous links will be updated too :) -- The PSU is a bit under-filtered by modern standards. Corner frequency for screen node is 3.4 Hz, only 10.6 Hz for node E. I don't know what the voltage differential is that you are hoping for between plate and screen, but KT-88s are often run with screens well below the plate, especially for high plate voltages. |
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