When I first started I had a johnny stewart cassette player powered by twelve D cell batteries. I didn't like the carry handle and drilled it and put a carry strap on it. When I sent it back to them for a rebuild they must have liked the strap idea 'cause they started putting a carry strap on theirs.
When they went to the caller with rechargeable batteries they put a much smaller speaker on them. Fortunately the slot to hold the speaker was the same size as the old speaker. That old speaker put sound out much farther than the smaller speakers.
I don't recall having a problem getting the crows down into the tall pines here. If you can direct the speaker toward the ground once they start coming in, they may come in lower.
Once there was a small hill(100 feet) in the delta(flat land for miles around). I climbed to the top of the hill and called. Only time I've ever had to shot DOWN at incoming crows.
Lord, I miss those days.
