diff --git a/csdr/__init__.py b/csdr/__init__.py
index 9ea983b..8284987 100644
--- a/csdr/__init__.py
+++ b/csdr/__init__.py
@@ -36,8 +36,6 @@ from csdr.pipe import Pipe
 from pycsdr.modules import Buffer
 from pycsdr.types import Format
 from csdr.chain.selector import Selector
-from csdr.chain.analog import Am, NFm, WFm, Ssb
-from csdr.chain.digiham import Dstar, Nxdn, Dmr, Ysf
 from csdr.chain.clientaudio import ClientAudioChain
 
 import logging
diff --git a/owrx/service/__init__.py b/owrx/service/__init__.py
index cc160e2..e22c34e 100644
--- a/owrx/service/__init__.py
+++ b/owrx/service/__init__.py
@@ -2,8 +2,6 @@ import threading
 from owrx.source import SdrSourceEventClient, SdrSourceState, SdrClientClass
 from owrx.sdr import SdrService
 from owrx.bands import Bandplan
-from owrx.wsjt import WsjtParser
-from owrx.js8 import Js8Parser
 from owrx.config import Config
 from owrx.source.resampler import Resampler
 from owrx.property import PropertyLayer, PropertyDeleted
@@ -285,9 +283,11 @@ class ServiceHandler(SdrSourceEventClient):
         # TODO add remaining modes
         if mod in ["ft8", "wspr", "jt65", "jt9", "ft4", "fst4", "fst4w", "q65"]:
             from csdr.chain.digimodes import AudioChopperDemodulator
+            from owrx.wsjt import WsjtParser
             return AudioChopperDemodulator(mod, WsjtParser())
         elif mod == "js8":
             from csdr.chain.digimodes import AudioChopperDemodulator
+            from owrx.js8 import Js8Parser
             return AudioChopperDemodulator(mod, Js8Parser())
         elif mod == "packet":
             from csdr.chain.digimodes import PacketDemodulator