Hi Tom,
You must have done that calculation before the thread caught my
attention.
I've checked everything I wrote, and I don't see anywhere that I
have said, "but they might still have made a mistake" as you appear
to be attributing to me.
When did I write that, or are you simply making up quotes for effect?
Tektronix had excellent engineers. Way better than most, but in
terms of reliability, they very often compromised the quality of
their designs in production by using poorly specified parts, and
cheese ball fixes for their mistakes. Their "tented" parts are
legion, and some are very embarrassing to see as an engineer.
(See 2465 A1 board for plenty of examples...)
That said, it is a fool who changes the arrangement or parts
selection, of an RF circuit he does not understand.
-Chuck Harris
Tom Lee wrote:
toggle quoted message
Show quoted text
Well, I've presented quantitative calculations explaining why capacitance matters in
this circuit, and thus why series combinations are helpful. In rebuttal, you provide
"but they might still have made a mistake." That's moving the goal posts, Chuck.
I am happy to concede (for the nth time) that Tek's engineers were not flawless. But
the series resistors in the 475A are that way because of capacitance, not incompetence.
--Tom
