Jeff,
According to the 1976 Tek catalog, the recommended probes for 50 ohm mode were P6056 (10x), P6057 (100x), and P6201 (FET). The P6202A (FET) would also be fine. For 1M ohm input, the recommended probes were P6053B (10x) and P6063A (1x/10x). Bandwidths varied. The 485 has power connectors for the FET probes.
You can download the catalog from:
--John Gord
toggle quoted message
Show quoted text
On Sun, Jan 10, 2021 at 08:39 PM, Jeff Dutky wrote:
Tom,
I've been reading everything that I could find about the 485 since this
discussion started, and the one thing that I can't find is any mention of what
probe would have been standard with the scope. The 485 was released the same
year as the 475 (with which I am quite familiar). The 475 would have shipped
with P6075 probes (or maybe P6063 probes? My father's scope, which he started
using in 1975, was shipped with P6075A probes).
The manuals for the 475 clearly list what kind of probe would have been
standard equipment with (and, apparently, were specifically designed for) the
scope. Depending on which manual you look at the 475 manuals list either the
P6075 or the P6106, but I haven't found any such listing in the 485's manual.
I've been using cheap Chinese 200 MHz probes to test my new (to me) 2465, and
the effects of the probes' bandwidth are evident. What probes would have been
used on a new 485 in the early to mid seventies?
-- Jeff Dutky
