Syntektor 54W

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Syntektor 54W; Körting-Radio; (ID = 1052419) Radio
Körting-Radio;: Syntektor 54W [Radio] ID = 1052419 933x598
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Pour le modèle Syntektor 54W, Körting-Radio; Leipzig, später Grassau
Pays:  Allemagne
Fabricant / Marque:  Körting-Radio; Leipzig, später Grassau
alternative name
Dietz & Ritter GmbH, Dr.
Année: 1953/1954 Catégorie: Radio - ou tuner d'après la guerre 1939-45
Lampes / Tubes 8: ECC81 EBF80 ECH81 EBF80 EM85 ECH81 ECC40 EL84
Semi-conducteurs (seuls les transistors sont comptés) DS61 DS61 Tr.Gl.=Metal-rectif.
Principe général Super hétérodyne avec étage HF; FI/IF 472/10700 kHz
Circuits accordés 7 Circuits MA (AM)     15 Circuits MF (FM)
Gammes d'ondes OM (PO), OL (GO), OC et FM (MF).
Tension / type courant Alimentation Courant Alternatif (CA). / 110; 125; 220; 240 Volt
Haut-parleur 2 Haut-parleurs / Ø 21 cm = 8.3 inch
Puissance de sortie
De Modèle: Syntektor 54W - Körting-Radio; Leipzig, später
Matière Boitier en bois
Forme Modèle de table, avec boutons poussoirs.
Dimensions (LHP) 646 x 390 x 275 mm / 25.4 x 15.4 x 10.8 inch

Dr. Ing. Waldemar Moortgat-Pick ist gemäss FG/141/30 der Vater des Körting Syntektor 54 und Royal Syntektor 55 - und natürlich für alle Geräte mit dieser interessanten Schaltung.

Syntektor = Synchro-Detektor (Synchron-Demodulator für UKW-FM).

Poids net 14.6 kg / 32 lb 2.5 oz (32.159 lb)
Prix de mise sur le marché 468.00 DM
Source extérieure Erb
Source Kat.d.Rundf.GrossH.1953/54
Littérature -- Original-techn. papers.
Schémathèque (1) Funkgeschichte der GFGF (Nr.141, p.30)

Tous les appareils de Körting-Radio; Leipzig, später Grassau
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Contributions du forum pour ce modèle
Körting-Radio;: Syntektor 54W
Discussions: 2 | Publications: 4
Vus: 878     Répondre: 0
korting: Die Synchro-Detektor-Schaltung Körting Syntektor 54
Franz Harder

Zu den Synchro-Detektor-Schaltungen der Körting Syntektor Geräte erschienen Berichte in verschiedenen Fachzeitschriften. Hier nun eine Beschreibung des Syntektor 54 nach Unterlagen des Körting Labors.

Der Bericht (2 Seiten + Schaltbild) erschien in Heft 9/1953 der Zeitschrift 'Radio Magazin' und ist dort abgelegt.

Vus: 1767     Répondre: 2
korting: 54W; Syntektor
Dennis Daly

Greetings Fellow Collectors!

 I am fortunate to be in the process of restoring an example of this somewhat historic and technically interesting model from the manufacturer Körting.

 After extensive routine work (cleaning, the restuffing of all paper capacitors, etc. etc.) and a complete realignment, I found the UKW to be exemplary in performance, but the LW/MW/KW bands had rather dismal performance at best.

 Knowing this model possesses a broadband (untuned) R.F. amplifier stage, I thought that its poorer than average AM performance was quite unusual, especially with the MW band.

 I proceeded to trace and investigate a cause.....Was it possibly a mistake in work by myself, or a hidden defect I had overlooked in the resto process?

 After a period of time poring over the schematic, taking passive and dynamic measurements and jotting notes,---I discovered the root cause.

A mistake in switchboard bus wiring had been made during assembly at the factory!

 A ground lead was connected to the wrong bus.  (39)

 No direct ground return was provided for bus (40)

 Apparently, these wiring errors were somewhat compensated for at the factory by (mis-) alignment and in doing so, must have allowed this particular unit to pass quality control/ testing.

 Simply moving the misplaced bus one row to the left side of the tasten Pertinax switchboard and adding the missing 1K resistor,(39 bis 39a,) together with a total realignment of the AM R.F. circuits made for a pleasing surprise of a radio that performs very well!

 Please note!

 Herr Staginnus has informed me that there are two variants of this model, as noted in the model page data list, schematics "c" and "d." (sch1, sch2) So, my example may not use the 1K cathode resistor switched into the EBF80 (1) cathode circuit for LW band only. (39-39a) I shall remove this resistor I had placed and revert back to direct bus connection per schematic "d," as I found it.

My radio did have the (40)  bus/ ground wiring error as mentioned. Sorry for any confusion, and thanks to Herr Staginnus for this observation. We learn!

 This radio is certainly worthy now of the installation of a new EM85 indicator tube!

 Of little technical use, but this is the first radio that I have literally restuffed the housings of the original Germanium diodes (discriminator) with matched, modern units (NTE110MP)

 I type this note as a hint to other owners of the model 54W in the event my radio was not the only example allowed to escape the factory of Körting with this error in bus wiring.


 D. Daly

Omer Suleimanagich

Hi Dennis,


That Korting model looks great!

Just out of curiosity,  wouldn't  be easier to just place a paper scan of the original capacitors, over the new yellow caps, and color the ends with a black permanent marker?

What's your technique for restuffing these smaller paper caps?

I only restuff the big electrolytic cap around the rectifier, and place all the removed components in a bag and leave the bag in the chassis.

I figure the next person working on the radio might not realize that components were replaced.

What do you think the protocol should be for radios of this period?



Dennis Daly

Hello Omer,

 There are many procedures  that may be deemed "easier."

 Being "easier" may not meet the personal requirements or wishes of the individual restorer.

 The original fiber housings as found in this model under discussion are easy enough (for myself and others,) to extract the internals and install the smaller, modern replacements and reseal with a modern equivalent. The replacement caps are physically smaller, so this size difference would be a consideration for me. I don't restuff every or all paper capacitors on all  German-produced models that come across my bench.

 If I, or anyone, chooses to restuff capacitors or diode housings for a particular special model, or all radios, is simply a personal choice and not a matter of "protocol," in my opinion.

 Saving old capacitors, as is most of this conversation, just a matter of one's opinion to do so or not.


Körting-Radio;: Syntektor 54W
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