replacement part help

[1iwilly]

looking for the cross-over or replacement for the scr501 transistor on the freq counter module it says it is a 5p-05m

 

[TM86]

From Sam's CB-251 the two cross references given are SK3572 and ECG5461.

 

[1iwilly]

From Sam's CB-251 the two cross references given are SK3572 and ECG5461.

thanks

 

[nomadradio]

It's not a transistor, it's a SCR, or silicon controlled rectifier. Turns on like a transistor, but stays turned on after the input is removed. Only turns off when you remove the power. In the Cobra 2000 it's wired in parallel with the power button. Pushing the power button to "On" shorts across the SCR effectively shutting it off.

73