I started callin coyotes in the late 60s early 1970, and I used an old Johnny Stewart caller that used a 45rpm record. Whew! Was that thing heavy. Then I went to the tape cassette on batteries, after I recorded the 45rpm. Better, but far from perfect. Then I started playing with mouth calls, but messed some with the now new electronic calls they were selling.
Then I decided to hell with it, I gonna learn to blow calls. That was probably in the early 80s. I never looked back, and when the howling started I jumped on that too.
I had rather call coyotes than hunt anything else but, no one around here does, so it's a loner proposition, and I have learned to hunt mostly alone. No one else wants to put the effort into it to do it right. When I shot an adult coyote while laying in the middle of a 400 acre winter wheat field (wheat about 6"s tall) at a range of 7', folks couldn't believe it.
There is nothing like watchin a coyote or bobcat come "to you" rather than "away from you". It's a hoot like no other, and makes all other hunting seem rather bland.