SP1a Speech Processor
The SP-1a Speech Processor was developed by Clear Channel Corporation for the Ranger AR-3300 and AR3500 radios. It works well in
most radios in AM FM & SSB. It is an audio processor that delivers an average of 90% modulation. It boosts lower levels to within 90% of it’s
maximum output with a very low distortion.
It connects in-line of the audio Mic input of the microphone jack. It also requires a 12 Volt connection in the radio. A SPST switch can be
used to switch the SP-1a in and out of the circuit. When switched off the speech processor is completely out of the circuit leaving the radio
back to stock audio.
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