Phonocord proton 3055K quadro

1 9 7 5 1975

A very obscure brand, Phonocord was based in Lahr (Gerätewerk Lahr GmbH, 763 Lahr, Schwarzwald), right where Thorens was between 1966 and 1990.

It is reasonable to see Phonocord operated by Thorens as an attempt at making less expensive and trendy components : those bearing the Thorens name never were too successful...

There were other units sporting the same design and Thorens TD-170 or TD-170mkII turntable : 3020K quadro, 3050K and 3025K quadro.
Advertised within bubbly plaster settings (lower end) or more neutral backs, like here for the higher-end.

The bigger models had the "formant" function that was also found on the contemporary Görler luxurious compacts. In-house speakers were available as well : 3020B, 3050B and 3060B, respectively 2, 3 and 4-way.

The proton 3055K quadro was available in a walnut enclosure (!), eggshell white (as shown here), grey-ish metallic and anthracite.

The whereabouts of the short-lived Phonocord (ad)venture seem to have completely vanished - anybody ?

Phonocord proton 3055K quadro, image 1 Phonocord proton 3055K quadro, image 2 Phonocord proton 3055K quadro, image 3
Phonocord proton 3055K quadro specifications
Title Value
TURNTABLE section TURNTABLE section
Type : Thorense TD-170 MK II belt-drive
Motor : 16-pole synchron motor
Platter : 3,2kg dynamically balanced aluminium
Tonearm : Thorens TP11
Speed accuracy : ± 0,07% (EMT 420 ; DIN 45507)
RECEIVER section RECEIVER section
Componentry : 27 transistors
1 IC
Bandwidths : 145...370Khz (LW)
510...1605Khz (MW)
5,8...8MHz (KW)
87,5...104MHz (UKW)
Preset number : 5 (UKW only)
Varicap gangs : 4
AM sensitivity : 20µV (LW ; 30% mod ; 6dB)
16µV (MW ; 30% mod ; 6dB)
4,5µV (KW ; 30% mod ; 6dB)
FM sensitivity : 1,5µV (UKW ; 40Khz hub ; 26dB)
Muting threshold : 0,8µV
Crosstalk : 45dB (1Khz...40Khz hub)
S/N ratio : 60dB (stereo ; 75Khz hub)
Pilot suppression : 46dB (19Khz)
43dB (38Khz)
AMPLIFIER section
fully-transistorized, DIN 45500 compliant
Type : "100W music power"
Output : 2x 35W (4 Ohm ; sinus)
2x 50W (4 Ohm ; musik)
Componentry : 33 transistors
4 ICs
1 dual IC
22 diodes
6 Zener diodes
3 bridge rectifiers
Inputs : Phono (3,5mV / 47kOhm)
Tape (300mV / 470 kOhm)
Radio (?) (300mV / 470kOhm)
THD : < 0,2% (100Hz...15Khz, rated power)
IMD : < 0,3%
Frequency response : 15Hz...20Khz (± 1dB)
Power bandwidth : 30Hz...30Khz
Damping factor : 45
S/N ratio : 60dB (phono ; full power)
70dB (tape ; full power)
Outputs : 6 loudspeakers (4...16 Ohm)
Headphones (4...2000 Ohm)
Tape 1 (140mV / 47kOhm)
Tape 2 (140mV / 47kOhm)
Balance : +5...-8dB
Bass control : +16...-20dB / 60Hz
Treble control : +16...-15dB / 15Khz
Formant setting : 0...+6dB at 3Khz
continuous and according to Fletcher/Munson curve
GENERAL GENERAL
Dimensions : 72 x 18 x 34cm
Weight : ?
Listprice ?
Phonocord proton 3055K quadro : 0 topic
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page online since : july 2010
page updated : july 2010
page type : LGT / KNB
page weight : 226.87 Kb / 0 b

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