The Roadrunners Tachometers were an excellent product - and as stated earlier we have developed a replacement product for them. Theres a few mechanical chassis parts left to be manufactured but the circuit etc is complete.
It works "identical" to a Roadrunner by a tiny magnet tripping a hall effect sensor once per revolution. However it does not display "speed" rather a count which which is 33333 in exactly 1.8 seconds, 45000 in 1.33333 seconds and 78000 in 0.7692 seconds.
The circuit is based upon 3 very accurate oscillators which output is divided by logic circuits and at each trip of the hall effect sensor the count is displayed on the 5 digit display. Its highly accurate and will read actual "speed" at the 3 main speeds - there is however the caveat that any number lower than 33333 means that the table is running to FAST and any number higher means that its running too SLOW. The same of course goes for the 2 other main speeds. Count to be displayed is selected by a switch on the back of the chassis which is slightly larger than the roadrunner.
https://systems.audiogon.com/systems/4923#&gid=1&pid=15
We will be offering them for sale as soon as the remaining chassis parts are available. Pricing will be $299
Good Listening
Peter
It works "identical" to a Roadrunner by a tiny magnet tripping a hall effect sensor once per revolution. However it does not display "speed" rather a count which which is 33333 in exactly 1.8 seconds, 45000 in 1.33333 seconds and 78000 in 0.7692 seconds.
The circuit is based upon 3 very accurate oscillators which output is divided by logic circuits and at each trip of the hall effect sensor the count is displayed on the 5 digit display. Its highly accurate and will read actual "speed" at the 3 main speeds - there is however the caveat that any number lower than 33333 means that the table is running to FAST and any number higher means that its running too SLOW. The same of course goes for the 2 other main speeds. Count to be displayed is selected by a switch on the back of the chassis which is slightly larger than the roadrunner.
https://systems.audiogon.com/systems/4923#&gid=1&pid=15
We will be offering them for sale as soon as the remaining chassis parts are available. Pricing will be $299
Good Listening
Peter