diff --git a/csdr/chain/digimodes.py b/csdr/chain/digimodes.py
index 8c5500a4..fd657f19 100644
--- a/csdr/chain/digimodes.py
+++ b/csdr/chain/digimodes.py
@@ -284,37 +284,3 @@ class DscDemodulator(SecondaryDemodulator, SecondarySelectorChain):
         loop_gain = self.sampleRate / self.getBandwidth() / 5
         self.replace(2, Lowpass(Format.FLOAT, cutoff))
         self.replace(3, TimingRecovery(Format.FLOAT, secondary_samples_per_bit, loop_gain, 10))
-
-
-class DscDemodulator(SecondaryDemodulator, SecondarySelectorChain):
-    def __init__(self, baudRate, bandWidth, invert=False):
-        self.baudRate = baudRate
-        self.bandWidth = bandWidth
-        self.invert = invert
-        # this is an assumption, we will adjust in setSampleRate
-        self.sampleRate = 12000
-        secondary_samples_per_bit = int(round(self.sampleRate / self.baudRate))
-        cutoff = self.baudRate / self.sampleRate
-        loop_gain = self.sampleRate / self.getBandwidth() / 5
-        workers = [
-            Agc(Format.COMPLEX_FLOAT),
-            FmDemod(),
-            Lowpass(Format.FLOAT, cutoff),
-            TimingRecovery(Format.FLOAT, secondary_samples_per_bit, loop_gain, 10),
-            Ccir493Decoder(fec=True, invert=invert),
-            DscDecoder(),
-        ]
-        super().__init__(workers)
-
-    def getBandwidth(self) -> float:
-        return self.bandWidth
-
-    def setSampleRate(self, sampleRate: int) -> None:
-        if sampleRate == self.sampleRate:
-            return
-        self.sampleRate = sampleRate
-        secondary_samples_per_bit = int(round(self.sampleRate / self.baudRate))
-        cutoff = self.baudRate / self.sampleRate
-        loop_gain = self.sampleRate / self.getBandwidth() / 5
-        self.replace(2, Lowpass(Format.FLOAT, cutoff))
-        self.replace(3, TimingRecovery(Format.FLOAT, secondary_samples_per_bit, loop_gain, 10))