OT: Electronic Design!

[Winfield Hill]

Bill Sloman wrote...

On Tuesday, October 22, 2019 at 12:10:15 AM UTC+11, Winfield Hill wrote:
Bill Sloman wrote...
=20
But it's on topic, that's the problem.

Not exactly. The problem is the usual one - he hasn't said
where it came from. or what it was actually intended to do,
as Phil Allison has pointed out
=20
Aren't we talking about the horizontal deflection amplifier
for the CRT in HP 8565A spectrum analyzers, c. 1977? See:
=20
https://www.dropbox.com/s/o4tybr81cefbk5n/8565A_amp.GIF?dl=3D1

The string "8565" didn't trigger anything in my memory. Cursitor Doom just =
talked about an "amplifier board".

The circuit diagram does mention that it's driving a horizontal CRT deflect=
ion plate. Somebody who knew a bit about HP 8565 might be able to work out =
how fast it might be going, but that's more digging that I'd be bothered do=
ing for Cursitor Doom.

The fact that it's an HP part suggests that it probably worked when it was =
new, but it's no guarantee that it was well-designed. Some of their stuff t=
hat I did have to dig into wasn't impressive.

The HP design is fine. All these aspects were discussed
in a thread started 13 Oct, Title: Amplifer Design
Message-ID: <qnvr21$kl6$11@dont-email.me>


--
Thanks,
- Win