When was instant-on radar first used?

[<<JAZZY>>]

Does anybody know approximately what year that cops started using radar guns that had instant-on capabilities instead of just constant-on?

[CJR238]

Does anybody know approximately what year that cops started using radar guns that had instant-on capabilities instead of just constant-on?

I believe it was around when “superwide-band” radar guns were developed. ~1990?

[bart99gt]

Sometime in the mid to late 70s. I think the K-55 was the first I/O unit on the market. By the early 80s, all of the radar manufacturers had an I/O model. Kustom had the KR-10/11, Decatur the MV-715/724 and MPH was still pumping out the K-55.

[Cobra]

i was just gonna ask a n00b question; if I\O applies to laser only. so basically, unless you have a radar jammer(which is illegal), a leo can use I\O radar and there's nothing you can do?

[charlie]

i was just gonna ask a n00b question; if I\O applies to laser only. so basically, unless you have a radar jammer(which is illegal), a leo can use I\O radar and there's nothing you can do?

You can use a rabbit, but even that doesn't completely protect you...

[MEM-TEK]

My guess would be around 1977 or 1978. The Mighty Professor Jimbonzzz probably knows the correct answer.

[Cobra]

You can use a rabbit, but even that doesn't completely protect you...

doh, so there is no way to protect against I\O?

[jimbonzzz]

My guess would be around 1977 or 1978. The Mighty Professor Jimbonzzz probably knows the correct answer.

Nope, I don't. But, I agree with what bart99gt posted.
The earliest radar unit that I know of that had an official "Hold" feature was the K55, which was introduced in the mid-70's. However, the K55 had some different rev's, and I don't know if the first-generation K55's actually had the Hold feature or if it came later.

[<<JAZZY>>]

Thanks for the information.

[Jon_Doh]

I saw it in use around '82 so I know it had to be developed before then.