diff --git a/sohstationviewer/model/reftek/from_rt2ms/core.py b/sohstationviewer/model/reftek/from_rt2ms/core.py
index b94b845367ecdbab1dcfa7723c40b7f0fd8f9ff4..221b1d05b46e0ef6c0f98a9e31ab82fcbbe1b86d 100644
--- a/sohstationviewer/model/reftek/from_rt2ms/core.py
+++ b/sohstationviewer/model/reftek/from_rt2ms/core.py
@@ -22,8 +22,10 @@ from obspy.io.reftek.packet import PACKET_FINAL_DTYPE
 from obspy.io.reftek.util import _decode_ascii, _parse_long_time
 
 from sohstationviewer.model.mseed_data.record_reader_helper import Unpacker
-from sohstationviewer.model.reftek.from_rt2ms import packet
-from sohstationviewer.model.reftek.from_rt2ms.soh_packet import Packet
+from sohstationviewer.model.reftek.from_rt2ms.packet import \
+    (
+    eh_et_payload_last_field_start, eh_et_payload_last_field_size, EHPacket,
+)
 from sohstationviewer.model.reftek.rt130_experiment.reftek_helper import \
     (
     read_rt130_file, convert_packet_to_obspy_format,
@@ -36,76 +38,72 @@ class DiscontinuousTrace(Trace):
         self.times = times
 
 
-eh_et_payload_last_field_start = 88
-eh_et_payload_last_field_size = 16
 
-# The payload start is based on the start of the payload, so we have to add 24
-# to compensate for the size of the header and extended header.
-eh_et_payload_end_in_packet = eh_et_payload_last_field_start + eh_et_payload_last_field_size + 24
 EH_PAYLOAD = {
     "station_name_extension": (35, 1, _decode_ascii),
     "station_name": (36, 4, _decode_ascii),
     "sampling_rate": (64, 4, float),
     "trigger_time": (72, 16, _parse_long_time),
-    "first_sample_time": (eh_et_payload_last_field_start, eh_et_payload_last_field_size, _parse_long_time),
+    "first_sample_time": (
+    eh_et_payload_last_field_start, eh_et_payload_last_field_size, _parse_long_time),
 }
 
 
-class EHPacket(packet.EHPacket):
-    def __init__(self, data):
-        self._data = data
-        payload = self._data["payload"].tobytes()
-        for name, (start, length, converter) in EH_PAYLOAD.items():
-            data = payload[start:start + length]
-            if converter is not None:
-                data = converter(data)
-            setattr(self, name, data)
-
-    def eh_et_info(self, nbr_DT_samples):
-        """
-        Compile EH and ET info to write to log file.
-        Returns list of strings.
-        Formatting of strings is based on earlier version of rt2ms.
-        """
-        info = []
-        # packet_tagline1 = ("\n\n{:s} exp {:02d} bytes {:04d} {:s} ID: {:s} "
-        #                    "seq {:04d}".format(self.type.decode(),
-        #                                        self.experiment_number,
-        #                                        self.byte_count,
-        #                                        Packet.time_tag(self.time),
-        #                                        self.unit_id.decode(),
-        #                                        self.packet_sequence))
-        # info.append(packet_tagline1)
-        # if self.type.decode('ASCII') == 'EH':
-        #     nbr_DT_samples = 0
-        #     info.append("\nEvent Header")
-        # else:
-        #     info.append("\nEvent Trailer")
-        # info.append("\n  event = " + str(self.event_number))
-        # info.append("\n  stream = " + str(self.data_stream_number + 1))
-        # info.append("\n  format = " + self.data_format.decode('ASCII'))
-        # info.append("\n  stream name = " + self.stream_name)
-        # info.append("\n  sample rate = " + str(self.sampling_rate))
-        # info.append("\n  trigger type = " + self.trigger_type)
-        trigger_time = Packet.time_tag(UTCDateTime(ns=self.trigger_time))
-        # info.append("\n  trigger time = " + trigger_time)
-        first_sample_time = Packet.time_tag(UTCDateTime(ns=self.first_sample_time))  # noqa: E501
-        # info.append("\n  first sample = " + first_sample_time)
-        # if self.last_sample_time:
-        #     info.append("\n  last sample = " + Packet.time_tag(UTCDateTime(ns=self.last_sample_time)))  # noqa: E501
-        # info.append("\n  bit weights = " + " ".join([val for val in self.channel_adjusted_nominal_bit_weights if val]))  # noqa: E501
-        # info.append("\n  true weights = " + " ".join([val for val in self.channel_true_bit_weights if val]))  # noqa: E501
-        packet_tagline2 = ("\nDAS: {:s} EV: {:04d} DS: {:d} FST = {:s} TT = "
-                           "{:s} NS: {:d} SPS: {:.1f} ETO: 0"
-                           .format(self.unit_id.decode(),
-                                   self.event_number,
-                                   self.data_stream_number + 1,
-                                   first_sample_time,
-                                   trigger_time,
-                                   nbr_DT_samples,
-                                   self.sampling_rate))
-        info.append(packet_tagline2)
-        return info
+# class EHPacket(packet.EHPacket):
+#     def __init__(self, data):
+#         self._data = data
+#         payload = self._data["payload"].tobytes()
+#         for name, (start, length, converter) in EH_PAYLOAD.items():
+#             data = payload[start:start + length]
+#             if converter is not None:
+#                 data = converter(data)
+#             setattr(self, name, data)
+#
+#     def eh_et_info(self, nbr_DT_samples):
+#         """
+#         Compile EH and ET info to write to log file.
+#         Returns list of strings.
+#         Formatting of strings is based on earlier version of rt2ms.
+#         """
+#         info = []
+#         # packet_tagline1 = ("\n\n{:s} exp {:02d} bytes {:04d} {:s} ID: {:s} "
+#         #                    "seq {:04d}".format(self.type.decode(),
+#         #                                        self.experiment_number,
+#         #                                        self.byte_count,
+#         #                                        Packet.time_tag(self.time),
+#         #                                        self.unit_id.decode(),
+#         #                                        self.packet_sequence))
+#         # info.append(packet_tagline1)
+#         # if self.type.decode('ASCII') == 'EH':
+#         #     nbr_DT_samples = 0
+#         #     info.append("\nEvent Header")
+#         # else:
+#         #     info.append("\nEvent Trailer")
+#         # info.append("\n  event = " + str(self.event_number))
+#         # info.append("\n  stream = " + str(self.data_stream_number + 1))
+#         # info.append("\n  format = " + self.data_format.decode('ASCII'))
+#         # info.append("\n  stream name = " + self.stream_name)
+#         # info.append("\n  sample rate = " + str(self.sampling_rate))
+#         # info.append("\n  trigger type = " + self.trigger_type)
+#         trigger_time = Packet.time_tag(UTCDateTime(ns=self.trigger_time))
+#         # info.append("\n  trigger time = " + trigger_time)
+#         first_sample_time = Packet.time_tag(UTCDateTime(ns=self.first_sample_time))  # noqa: E501
+#         # info.append("\n  first sample = " + first_sample_time)
+#         # if self.last_sample_time:
+#         #     info.append("\n  last sample = " + Packet.time_tag(UTCDateTime(ns=self.last_sample_time)))  # noqa: E501
+#         # info.append("\n  bit weights = " + " ".join([val for val in self.channel_adjusted_nominal_bit_weights if val]))  # noqa: E501
+#         # info.append("\n  true weights = " + " ".join([val for val in self.channel_true_bit_weights if val]))  # noqa: E501
+#         packet_tagline2 = ("\nDAS: {:s} EV: {:04d} DS: {:d} FST = {:s} TT = "
+#                            "{:s} NS: {:d} SPS: {:.1f} ETO: 0"
+#                            .format(self.unit_id.decode(),
+#                                    self.event_number,
+#                                    self.data_stream_number + 1,
+#                                    first_sample_time,
+#                                    trigger_time,
+#                                    nbr_DT_samples,
+#                                    self.sampling_rate))
+#         info.append(packet_tagline2)
+#         return info
 
 
 class Reftek130Exception(ObsPyException):
diff --git a/sohstationviewer/model/reftek/from_rt2ms/packet.py b/sohstationviewer/model/reftek/from_rt2ms/packet.py
index c3ddb8865c877ef54805ca1bf72277623fe88f44..b712edf23b11538006dda9bfb366e0140a5f7880 100644
--- a/sohstationviewer/model/reftek/from_rt2ms/packet.py
+++ b/sohstationviewer/model/reftek/from_rt2ms/packet.py
@@ -25,53 +25,45 @@ class Reftek130UnpackPacketError(ValueError):
     pass
 
 
+eh_et_payload_last_field_start = 88
+eh_et_payload_last_field_size = 16
+
+# The payload start is based on the start of the payload, so we have to add 24
+# to compensate for the size of the header and extended header.
+eh_et_payload_end_in_packet = eh_et_payload_last_field_start + eh_et_payload_last_field_size + 24
+
 # name, offset, length (bytes) and converter routine for EH/ET packet payload
 EH_PAYLOAD = {
-    "trigger_time_message": (0, 33, _decode_ascii),
-    "time_source": (33, 1, _decode_ascii),
-    "time_quality": (34, 1, _decode_ascii),
     "station_name_extension": (35, 1, _decode_ascii),
     "station_name": (36, 4, _decode_ascii),
-    "stream_name": (40, 16, _decode_ascii),
-    "_reserved_2": (56, 8, _decode_ascii),
     "sampling_rate": (64, 4, float),
-    "trigger_type": (68, 4, _decode_ascii),
     "trigger_time": (72, 16, _parse_long_time),
-    "first_sample_time": (88, 16, _parse_long_time),
-    "detrigger_time": (104, 16, _parse_long_time),
-    "last_sample_time": (120, 16, _parse_long_time),
-    "channel_adjusted_nominal_bit_weights": (136, 128, _16_tuple_ascii),
-    "channel_true_bit_weights": (264, 128, _16_tuple_ascii),
-    "channel_gain_code": (392, 16, _16_tuple_ascii),
-    "channel_ad_resolution_code": (408, 16, _16_tuple_ascii),
-    "channel_fsa_code": (424, 16, _16_tuple_ascii),
-    "channel_code": (440, 64, _16_tuple_ascii),
-    "channel_sensor_fsa_code": (504, 16, _16_tuple_ascii),
-    "channel_sensor_vpu": (520, 96, _16_tuple_float),
-    "channel_sensor_units_code": (616, 16, _16_tuple_ascii),
-    "station_channel_number": (632, 48, _16_tuple_int),
-    "_reserved_3": (680, 156, _decode_ascii),
-    "total_installed_channels": (836, 2, int),
-    "station_comment": (838, 40, _decode_ascii),
-    "digital_filter_list": (878, 16, _decode_ascii),
-    "position": (894, 26, _decode_ascii),
-    "reftek_120": (920, 80, None)}
-
+    "first_sample_time": (eh_et_payload_last_field_start, eh_et_payload_last_field_size, _parse_long_time),
+}
 obspy_rt130_packet.EH_PAYLOAD = EH_PAYLOAD
 
 
 class EHPacket(obspy_rt130_packet.EHPacket):
+    def __init__(self, data):
+        self._data = data
+        payload = self._data["payload"].tobytes()
+        for name, (start, length, converter) in EH_PAYLOAD.items():
+            data = payload[start:start + length]
+            if converter is not None:
+                data = converter(data)
+            setattr(self, name, data)
+
     def __str__(self, compact=False):
         if compact:
             sta = (self.station_name.strip() +
                    self.station_name_extension.strip())
             info = ("{:04d} {:2s} {:4s} {:2d} {:4d} {:4d} {:2d} {:2s} "
                     "{:5s}  {:4s}        {!s}").format(
-                        self.packet_sequence, self.type.decode(),
-                        self.unit_id.decode(), self.experiment_number,
-                        self.byte_count, self.event_number,
-                        self.data_stream_number, self.data_format.decode(),
-                        sta, str(self.sampling_rate)[:4], self.time)
+                self.packet_sequence, self.type.decode(),
+                self.unit_id.decode(), self.experiment_number,
+                self.byte_count, self.event_number,
+                self.data_stream_number, self.data_format.decode(),
+                sta, str(self.sampling_rate)[:4], self.time)
         else:
             info = []
             for key in self._headers:
@@ -136,3 +128,5 @@ class EHPacket(obspy_rt130_packet.EHPacket):
                                    self.sampling_rate))
         info.append(packet_tagline2)
         return info
+
+
diff --git a/sohstationviewer/model/reftek/rt130_experiment/eh_et_packet.py b/sohstationviewer/model/reftek/rt130_experiment/eh_et_packet.py
index 6e043bfec0b8b42c467d8a65fbea561db8f40ad8..7324eee718fd1d2237353d88fcb5d943a6bd837d 100644
--- a/sohstationviewer/model/reftek/rt130_experiment/eh_et_packet.py
+++ b/sohstationviewer/model/reftek/rt130_experiment/eh_et_packet.py
@@ -2,7 +2,8 @@ import dataclasses
 
 from sohstationviewer.model.mseed_data.record_reader_helper import \
     Unpacker
-from sohstationviewer.model.reftek.from_rt2ms.core import eh_et_payload_end_in_packet
+from sohstationviewer.model.reftek.from_rt2ms.packet import \
+    eh_et_payload_end_in_packet
 from sohstationviewer.model.reftek.rt130_experiment.header import PacketHeader
 
 
diff --git a/sohstationviewer/model/reftek/rt130_experiment/header.py b/sohstationviewer/model/reftek/rt130_experiment/header.py
index 2bd346897eab8a65b7ee3764ff651db0d4aa430c..f0c26d9d053177f8b0016b5270a2c42e20f7a326 100644
--- a/sohstationviewer/model/reftek/rt130_experiment/header.py
+++ b/sohstationviewer/model/reftek/rt130_experiment/header.py
@@ -4,11 +4,7 @@ from obspy import UTCDateTime
 
 from sohstationviewer.model.mseed_data.record_reader_helper import \
     Unpacker
-from sohstationviewer.model.reftek.rt130_experiment.reftek_helper import (
-    RT130ParseError,
-)
-
-from sohstationviewer.model.reftek.from_rt2ms import core
+from sohstationviewer.model.reftek.rt130_experiment import reftek_helper
 
 
 @dataclasses.dataclass
@@ -59,13 +55,13 @@ def get_rt130_packet_header(rt130_packet: bytes,
     except UnicodeError:
         print(f'Cannot decode packet type.')
         print('The given file does not appear to be a valid RT130 file.')
-        raise RT130ParseError
+        raise reftek_helper.RT130ParseError
     valid_packet_types = ['AD', 'CD', 'DS', 'DT', 'EH', 'ET', 'OM', 'SH', 'SC',
                           'FD']
     if packet_type not in valid_packet_types:
         print(f'Invalid packet type found: {packet_type}')
         print('The given file does not appear to be a valid RT130 file.')
-        raise RT130ParseError
+        raise reftek_helper.RT130ParseError
 
     experiment_number = int(rt130_packet[2:3].hex())
     year = int(rt130_packet[3:4].hex())
@@ -82,13 +78,9 @@ def get_rt130_packet_header(rt130_packet: bytes,
                         byte_count, packet_sequence)
 
 
-class Reftek130(core.Reftek130):
-    pass
-
-
-waveform_file = '/Users/kle/PycharmProjects/sohstationviewer/tests/test_data/RT130-sample/2017149.92EB/2017150/92EB/1/000000015_0036EE80'
-soh_file = '/Users/kle/PycharmProjects/sohstationviewer/tests/test_data/RT130-sample/2017149.92EB/2017150/92EB/0/000000000_00000000'
-import time
-start = time.perf_counter()
-(Reftek130.from_file(waveform_file).to_stream())
-# print('Time taken:', time.perf_counter() - start)
+# waveform_file = '/Users/kle/PycharmProjects/sohstationviewer/tests/test_data/RT130-sample/2017149.92EB/2017150/92EB/1/000000015_0036EE80'
+# soh_file = '/Users/kle/PycharmProjects/sohstationviewer/tests/test_data/RT130-sample/2017149.92EB/2017150/92EB/0/000000000_00000000'
+# import time
+# start = time.perf_counter()
+# (Reftek130.from_file(waveform_file).to_stream())
+# # print('Time taken:', time.perf_counter() - start)
diff --git a/sohstationviewer/model/reftek/rt130_experiment/reftek_helper.py b/sohstationviewer/model/reftek/rt130_experiment/reftek_helper.py
index fa19960ca6b36719638cb67db3a675c2e664cc87..2803fe09ab6c87b9da2ba29b78898138f8608bbe 100644
--- a/sohstationviewer/model/reftek/rt130_experiment/reftek_helper.py
+++ b/sohstationviewer/model/reftek/rt130_experiment/reftek_helper.py
@@ -5,7 +5,7 @@ import numpy
 import numpy as np
 
 from sohstationviewer.model.mseed_data.record_reader_helper import Unpacker
-from sohstationviewer.model.reftek.from_rt2ms.core import \
+from sohstationviewer.model.reftek.from_rt2ms.packet import \
     eh_et_payload_end_in_packet
 from sohstationviewer.model.reftek.rt130_experiment.dt_packet import \
     (