Originally Posted by Steve Redgwell
I wonder if damage to a circuit board or other component would account for the declining accuracy? The reason I asked about damaged equipment earlier is because my experience has shown that unserviceabilities like cracks or impacts from rough handling do not always stop something from functioning, but will degrade performance. Muzzle blast, heat from the sun or improper handling may cause problems.
.

Steve, good question. The crystal oscillator is only as good as the components that control it.

[Linked Image from i.postimg.cc]

Capacitors and resistors can change values with age which will change the total output and accuracy of the circuit, and transistors due to the NPN or PNP junction also decline in response time with age. They just start getting erratic until finally giving up the ghost. So you can have all kinds of errors introduced due to voltage changes and/or bias changes to both the oscillator and the output circuitry. It’s common.

Originally Posted by Al_Nyhus
Originally Posted by Steve Redgwell
They state that accuracy is +/-.5% of measured velocity or better. For example, a 3000 fps load would be no more than 15 fps out. Say, 2993 to 3008 fps.

Steve, in the example of +/- .5% of 3,000 fps, the actual range of velocities displayed could be from 2985 to 3015.

Good shootin' smile -Al

Oehler just happens to give you all of that.

[Linked Image from i.postimg.cc]

Last edited by Swifty52; 05/23/22.

Swifty