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Radio, Record Players, Instrument Amplifiers, Recorders...
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Mfg., Bell Sound Systems, Inc.
bell_sound_model_rc47_sams_photofact_schematic
TRADE NAME Bell Sound, Model RC-47 (RE-CORD-O-FONE)
MANUFACTURER Bell Sound Systems, Inc.
TYPE SET AC Operated Portable Recorder and Phonograph
TUBES (Three)
POWER SUPPLY 110-120 VAC
Sams Photofact Set 30 Folder 3 Bell Sound Model RC47 # 4 Digital Only
bell_sound_model_rt204_tape_recorder_model_rt204_sams_photofact_schematic
TRADE NAME Bell Sound Model RT-204
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC 60 Cycles 110-120 Volts 
The Bell model RT-204  is designed to record and play back two tracks of material on 
standard width recording tape (1/4 ")
Sams Photofact Set 367 Folder 5 Bell Sound Tape Recorder Model RT204 # 12 
bell_sound_model_r3728m_sams_photofact_schematic
AC- Battery Operated 3 Channel Nine Tube Amplifier
Sams Photofact Set 24 Folder 11 Bell Sound Model 3728M # 4 
bell_sound_model_rt75_sams_photofact_schematic
MFR., Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
The Bell Model RT-75 is a three speed , dual track tape Racorder. 
The dual track feature allows more recording time on each reel and with light weight tape, 
as much as eight hours total or four hours each side, may be had on a 7 inch reel at slowest speed. 
 (1 7/8, 3 3/4, or 7 1/2 inches per second.)
Sams Photofact Set 329 Folder 4 Bell Sound Tape Recorder Model RT75 RT-75 # 15
bell_sound_model_440l_4405_belfone_sams_photofact_schematic
TRADE NAME Bell Sound "BELFONE" Models 440L 440S
AC-DC Operated Inter-Communications System
TUBES 1S5 AF Amp., 3Q4 Power Output.
Sams Photofact Set 25 Folder 9 Bell Sound "BELFONE" Models 440L 440S # 4
bell_sound_amplifier_model_2200_sams_photofact_schematic
TRADE NAME Bell Sound Model 2200
MFR., Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Operated 7 Channel Audio Amplifier
Sams Photofact Set 207 Folder 1 Bell Sound Amplifier Model 2200 # 6 Digital Only
bell_sound_amplifier_model_3710a_pa3710a-p3_sams_photofact_schematic
TRADE NAME Bell Sound Models 3710A, PA3710A-P3
MFR., Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Operated 10 Watt Audio Amplifier
Sams Photofact Set 225 Folder 6 Bell Sound Model 3710A PA3710AP3 # 4 
bell_sound_amplifier_models_3723mb_3723mb3_sams_photofact_schematic
TRADE NAME Bell Sound Models 3723-MB 3723-MB3
MFR., Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC-Battery  Operated  Mobile Audio Amplifier with 
Single or 3 Sreed Record Players
Sams Photofact Set 224 Folder 4 Bell Sound Model 3723MB 3723MB3 # 5
bell_sound_amplifier_model_2199_sams_photofact_schematic
TRADE NAME Bell Sound Models 3723-MB 3723-MB3
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC- Operated  6 Channel 12 Watt  Audio Amplifier
Sams Photofact Set 228 Folder 5 Bell Sound Model 2199 # 6
bell_sound_amplifier_model_3706m_sams_photofact_schematic
TRADE NAME Bell Sound Model 3706-M
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC- Battery Operated  Two Channel 6 Watt  Audio Amplifier
Sams Photofact Set 227 Folder 3 Bell Sound 3706M # 4 
bell_sound_amplifier_model_3d_sams_photofact_schematic
TRADE NAME Bell Sound Model 3D
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Operated Binaural Audio Amplifier with Equalization and Pre- Amp.
Sams Photofact Set 256 Folder 3 Bell Sound Model 3D # 5 
bell_sound_amplifier_model_2150_2150r_sams_photofact_schematic
TRADE NAME Bell Sound Model 2150 2150R
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Operated 50 Watt Booster Audio Amplifier
TUBES Seven
Sams Photofact Set 256 Folder 8 Bell Sound Model 2150 2150R # 4
bell_sound_am_fm_tuner_model_2210_sams_photofact_schematic
TRADE NAME Bell Sound Model 2210
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Operated AM FM Tuner for Custom Installations
TUBES Eleven
Sams Photofact Set 269 Folder 4 Bell Sound Model 2210 # 8 
bell_sound_amplifier_model_2122b_sams_photofact_schematic
TRADE NAME Bell Sound Model 2122B
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Operated 4 Channel Audio Amplifier
TUBES Six
 Sams Photofact Set 199 Folder 2 Bell Sound Model 2122B # 4 
bell_sound_amplifier_model_2145_2145a_sams_photofact_schematic
TRADE NAME Bell Sound Model 2145 2145A
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Operated Six Channel Audio Amplifier
TUBES Eleven
Sams Photofact Set 161 Folder 2 Bell Sound 2145 2145A # 8
bell_sound_model_rt65_tape_recorder_sams_photofact_schematic
TRADE NAME Bell Sound Model RT-65
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Operated Tape Recorder
TUBES Four
Sams Photofact Set 130 Folder 4 Bell Sound Model RT-65 RT65 # 4 
bell_sound_amplifier_model_pa3750-b_3750-b_sams_photofact_schematic
TRADE NAME Bell Sound Models PA3750-B, 3750-B
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Operated 4 Channel 50 Watt Audio Amplifier
TUBES Twelve
Sams Photofact Set 250 Folder 5 Bell Sound Model PA3750B 3750B PA3750-B 3750-B # 4 
bell_sound_amplifier_model_pa3725_sams_photofact_schematic
TRADE NAME Bell Sound Models PA3725-B, 3725-B
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Operated 4 Channel 25 Watt Audio Amplifier
Sams Photofact Set 244 Folder 3 Bell Sound Model PA3725B 3725B PA3725-B 3725-B # 4 
bell_sound_mobile_amplifier_model_3717-mb_3717-mb3_sams_photofact_schematic
TRADE NAME Bell Sound Models 3717-MB, 3717-MB3
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Battery Operated Mobile Audio Amplifier, with Single or 3 Speed Players
TUBES Five
Sams Photofact Set 238 Folder 5 Bell Sound 3717MB 3717MB3 3717-MB 3717-MB3 # 4 
bell_sound_amplifier_models_2195_2195mg_sams_photofact_schematic
TRADE NAME Bell Sound Models 2195, 2195MG
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Operated 3 Channel 10 Watt Audio Amplifier, with 3 Speed Record Players
TUBES 7 or 8 Depending on Model (2195MG uses 8 tubes)
Sams Photofact Set 234 Folder 1 Bell Sound Model 2195 2195MG # 4 
bell_sound_amplifier_model_3728mb_sams_photofact_schematic
TRADE NAME Bell Sound Model 3728MB
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Battery Operated 3 Channel 32 Watt Audio Amplifier
TUBES Nine
Sams Photofact Set 235 Folder 3 Bell Sound Model 3728MB # 6 
bell_sound_amplifier_model_b23_sams_photofact_schematic
TRADE NAME Bell Sound Model B-23
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET ACOperated 3 Channel Audio Amplifier
TUBES Seven
Sams Photofact Set 75 Folder 4 Bell Sound Model B23 B-23 # 4 
bell_sound_amplifier_model_2122_sams_photofact_schematic
TRADE NAME Bell Sound Model 2122
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Operated 4 Channel Audio Amplifier
TUBES Seven
Sams Photofact Set 77 Folder 3 Bell Sound Model 2122 # 4
bell_sound_amplifier_model_2122r_sams_photofact_schematic
TRADE NAME Bell Sound Model 2122R
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
TYPE SET AC Operated 4 Channel Audio Amplifier with Remote Control
TUBES Six
Sams Photofact Set 76 Folder 7 Bell Sound Model 2122R # 4 
bell_sound_models_t200_t210_series_tape_recorders_sams_photofact_schematic
TRADE NAME Bell Sound Models T-200 Series T-210 Series Tape Recorders 
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
Sams Photofact Set 437 Folder 3 Bell Sound Model T200 T210 T-200 T-210 # 19
bell_sound_model_420_belfone_sams_photofact_schematic
TRADE NAME Bell Sound Model 420 
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
AC-DC Operated Inter- Communications System
Tubes Three
Sams Photofact Set 150 Folder 4 Bell Sound Model 420 # 4 
bell_sound_model_352 _belfone_sams_photofact_schematic
TRADE NAME Bell Sound Model 352 
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
AC-DC Operated Inter- Communications System
Tubes Three
Sams Photofact Set 149 Folder 4 Bell Sound Model 352 # 4
bell_sound_amplifier_model_2520_am_fm_tuner_sams_photofact_schematic
TRADE NAME Bell Sound Model 2520 
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
AC-DC Operated AM FM Tuner
Tubes Eight
Sams Photofact Set 421 Folder 4 Bell Sound Model 2520 # 8 
bell_sound_amplifier_model_2360_sams_photofact_schematic
TRADE NAME Bell Sound Model 2360 
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
AC Operated 50 Watt 8 Channel Audio Amplifier
Tubes Seven
Sams Photofact Set 424 Folder 3 Bell Sound Model 2360 # 5 
bell_sound_model_350_belfone_sams_photofact_schematic
TRADE NAME Bell Sound Model 350 Belfone 
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
AC-DC Operated Inter- Communications System
Tubes Three
Sams Photofact Set 148 Folder 5 Bell Sound Model 350 # 4 
bell_sound_model_601_603_tape_recorder_sams_photofact_schematic
TRADE NAME Bell Sound Model 601, 603 
MANUFACTURER Bell Sound Div., Thompson Ramo Wooldridge Inc., 6325 Huntley Rd., Columbus 24 Ohio
2-Speed 4 Track Cartridge Loaded Recorders 601 is Mono and 603 is Stereo
Tubes Eight
Sams Photofact TR-6 Bell Sound Models 601, 603 Pgs. 25-44 # 21 
bell_sound_model_bt2051b_bt2050b_tape_sams_photofact_schematic
TRADE NAME Bell Sound Model BT-2051B, BT-2050B
MANUFACTURER Bell Sound Systems, Inc., 555 Marion Rd., Columbus, Ohio
Both Models are designed for two-channel Stereo.
Sams Photofact TR-4 Bell Sound Model BT-2051B BT-2050B Pgs. 1-13  # 13