Audio recorders

Aiwa TP-30

Aiwa TP-60R

Andy Gard Recorder

Answer ATR-102

Apolec RA-11


Assmann TS 10

Concord F-20

Concord F-85

Crown CTD-2200

Dictaphone Dictet

Dictaphone 4250

Dictaphone model 848

Dictaphone "OMEGA"

Dictophone KGB "Sobesednik"

Dokorder PT-4H

EDI model M-75B

Edison Envoy Model 1

Electron 52D

Electronica M-401S

Electronica M-402S

Electronica M327

Emerson Wondergram


Fanon-Masco FTR-2

Fi-Cord 1A

Fi-Cord 101S

Fi-Cord 303

Fi-Cord 300A

Gray Audograph D6

Grundig EN3 Luxus

Grundig DeJur Versatile III

Grundig Stenorette 2000

Globe-Corder GT-101

IBM 224 Dictating Unit

Juliette LT-44

Lanier VIP/C

Lloyd's 8 track player


Memocord K60

Memocord mini K177



Minifon Mi51

Minifon Attache

Minifon Attache-Speaker

Minifon Hi-Fi

Minifon Liliput

Minifon Protona Special

Minifon P55 "Plexi"

Minifon P55 L (1957)

Minifon P55 L (1960)

Minifon P55-Speaker

Minifon_wrist watch_mic

Mohawk Midgetape 44

Mohawk Midgetape 300

Mohawk Midgetape 400



MS-61 - Flight Recorder

National RQ-8100

Norelco LFH 0085/54

Norelco LFH 0095

Olympia DG 402

Olympus Pearlcorder L200

Panasonic RQ-115

Panasonic RQ-212DKS

Panasonic RQ-SX56

Panasonic RQ-SX97F

Philips EL 3302

Phono TRIX 88

Playtape 1200

Pocket Corder MC-2

Reporter 5

Ross Mark-55

Sanyo Micro-Pack 35

Sanyo M2580K

Sony BM-17 Dictator

Sony TC-5

Sound Machine "Hokie Pokie"


SoundScriber 200

SoundScriber 200 B

Sputnik 401

Spy Tape Recorder

Steelman Transitape

Stenotape TR-711

Stuzzi Memocord 304 B

Tefifon Holiday BK-59

Telefunken 600

Telmar T-100


Topaz D202



-1 (Yacht)/i-1



Televisions, video

Akai VT-150

Akai VC-150


Electronica-video VMP-1



Electronica L1-08

Panasonic TR-1030P

Sony AV-3400

Sony AVC-3400

Sony SL-F1E & TT-F1E

Sony Watchman FD-30A

Sony Watchman FD-40A


Tube radios

Emerson 508

Motorola 56L2

RCA Victor 54B2

RCA Victor BP-10

Sterling LS-4

Tourist PMP-56

United Deluxe RN-5




Minifon_wrist watch_mic

Andy Gard Recorder

Olympia DG 402

Dictaphone Topaz D202

MS-61 - Flight Recorder


Other rarities

Detective Dictograph



Motorola M75

Pentacon six TL

Tube Tester I-177


V/A - Meters

First transistors USSR


My works

Tube stereo cassette player

Tube Microcassette recorder

Tube "Electron 52D"






RussianAudio recorders Televisions, video Tube radios NEW Other rarities My works


Dokorder PT-4H



Used Google translator

     Dokorder PT-4H.     Portable reel tape recorder. Made in Japan, presumably in 1964. Dimensions 195 x 100 x 55 mm with no protruding parts. Weight without battery 1.2 kg. Power 7,5 v, five AA batteries. In the recorder used coil diameter 3, 1/4 inch tape width 1/4 inch. Construction machinery is rather complex, the whole mechanics and body metal. In the kinematics uses two belts, also made of metal, a coiled spring. Belt speed is stabilized. Horizontally-mounted engine rotates rubberized flywheel axis of which is capstan. Both heads have a cylindrical shape, and the total clamping strip. Thrust has two fixed positions, which is very handy when filling up the tape. The coils are fixed on the reel table with latches that do not allow them to fly off at any position of the recorder. It can be put or put whatever you like. For the convenience of a folding metal stand is in the form of staples. Near the pinch roller is the pin on which the attachment is stored on the capstan, increasing its diameter. The nozzle is fixed to the capstans screw. Increasing the diameter capstans increases the speed of the tape. At the lowest speed (1, 7/8" per second) device can be used as a dictaphone. At high speed (3, 3/4" per second) recording quality is much better and can play music. In general, the tape makes a good impression. Unfortunately there is no fast forward at all, and rewind hand, is carried by the handle located on the side of the body. To rewind the need to nominate the handle from the body, and rotate clockwise. To switch modes, there are three key "STOP", "REC", and "PLAY", located in a row. In addition there are volume controls, and connectors for a microphone, headphones and external power supply. On the front side of the shell is a metal curtain covering the threaded hole into which is screwed the cable remote activation. Such cable previously used with cameras for remote activation. Batteries are inserted into a metal tape having a connector. When the cassette is inserted into the battery compartment, plug is combined with the connector in the body. Circuit collected six transistors 2SB73 (1 pc.), 2SB75 (2 pcs.), 2SB77 (2 pcs.), D65 (1 pc.).
     The device was bought in working condition, but after replacing the dried electrolyte generally was as new. Included with the tape recorder were leather case and original microphone DM-0051.

 Photos can be enlarged   


Erase head (left in photo) is made in the form of a cylinder with integrated rectangular magnet. When the recording mode is turned head rotates about its axis and is supplied to the magnetic tape. In the picture below left enabled playback on the right - the recording mode, see the rectangular magnet


In the picture below the shutter covering the hole for the cable remote control


In the photo below left steering gear erase head


Operating instructions Dokorder PT-4H