|3rd September 2011, 04:29 AM||#11|
Join Date: Feb 2011
Location: Greater Seattle Area
Anyway, my 5842's are Raytheon and RCA (I have two pairs) and swapping them hasn't have any effect. The 45s however do seem to be different. On one channel I can't get the bias current under 45mA and if I swap the tubes, the issue follows.
Initially I had set the board up for my pair of new 300Bs and I was able to adjust all operating points as expected, but it still sounded off and distorted at higher volume.
I decided to 'park' the board and revisit after
A) I learned how to use my scope properly (I thought I did, but...) and
B) I read up on the theory, so I know where and how to measure
One day, there will be light (and sound)!
For the next couple of days I'll focus on Salmon fishing in the San Juans anyway.
Happy Labor Day,
There are 10 types of people: Those who understand binary and those who don't.
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