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SABA S-455WK 455WK

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SABA S-455WK 455WK; SABA; Villingen (ID = 2028384) Radio
SABA; Villingen: SABA S-455WK 455WK [Radio] ID = 2028384 1400x957
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For model SABA S-455WK 455WK, SABA; Villingen
Country:  Germany
Manufacturer / Brand:  SABA; Villingen
Schwer & Söhne, GmbH
Year: 1938/1939 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 5: ECH11 EBF11 EL11 AZ11 EFM11
Main principle Super-Heterodyne (Super in general); ZF/IF 487 kHz
Tuned circuits 8 AM circuit(s)
Wave bands Broadcast, Long Wave and 2 x Short Wave.
Power type and voltage Alternating Current supply (AC) / 110; 125; 150; 220; 240 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Model: SABA S-455WK 455WK - SABA; Villingen
Material Wooden case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 580 x 380 x 290 mm / 22.8 x 15 x 11.4 inch
Notes Normally we don't put the maker into the model name and tell not to search inclusive maker name in the model name field. Here SABA 455WK instead of just 455WK or 455 WK stands as an example - just to give you this information.
Eingangs-Bandfilter, variable Bandbreitenregelung (ZF).
Net weight (2.2 lb = 1 kg) 16.5 kg / 36 lb 5.5 oz (36.344 lb)
Price in first year of sale 280.00 RM
Collectors' prices  
Source of data Handbuch WDRG 1938 / Radiokatalog Band 1, Ernst Erb
Circuit diagram reference Lange+Schenk+FS-Röhrenbestückung
Mentioned in Technisch- Commercieel - Radio Vademecum Staleman
Literature/Schematics (1) -- Original-techn. papers.
Picture reference Das Modell ist im «Radiokatalog» (Erb) abgebildet.

All listed radios etc. from SABA; Villingen
Here you find 1550 models, 1409 with images and 1035 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.


Forum contributions about this model
SABA; Villingen: SABA S-455WK 455WK
Threads: 4 | Posts: 14
Hits: 2159     Replies: 1
saba: SABA 455WK (455 WK);
Knut Hage


Kann mir jemand sagen, wie man die Abschirmbecher der Schwingkreise abbekommt,

einfach abziehen? Ich möchte dabei nichts kaputtmachen und frage deshalb lieber mal herum.

Mit bestem Dank und freundlichen Grüßen


Martin Renz

Die Abschirmbecher aus Aluminium sind mittels eines Bajonett-Verschlusses befestigt. Ein vorsichtiges Rütteln und eine leichte Drehung genügen, um die beiden Nasen (aussen als zwei gegenüberliegende eingedrückte Punkte sichtbar) aus der Führung zu befreien. Der Becher kann dann nach oben abgezogen werden.

Viel Erfolg beim Renovieren wünscht

Martin Renz

Hits: 2039     Replies: 0
saba: SABA 455WK (455 WK);
Martin Schmidt2


ich such für meinen 455WK eine Rückwand ohne Netzstecker und einen Satz Original Knöpfe zu dem Gerät.Vielleicht hat ja noch jemand sowas auf Lager liegen?

Viele Grüsse aus dem Westerwald



Hits: 2497     Replies: 2
saba: RE: PAPERS article - Funkschau 15 Jan 1939, page 4
Robert Sarbell
  1 All members interested in Saba early Superhets (and especially members who have a model 455WK OR a model S 455WK), I have manually typed in (using the German character keyboard) and translated the article described above.

The translated output (using the Babelfish software translator) is as follows:


Superhet - 8 circuits - 5 Tubes

Wave bands: 13.5 - 34, 30,-91, 200 - 600, 750 - 2000 m

IF - 485 kHz

As alternating current equipment available

Tube assembly: ECH11, EBF11, EFM11, EL11, AZ11

Power absorption: 55 Watts Connection for 2 loudspeakers: Impedance about 7000 ohms

Special characteristics: Two-stage entrance band filter; even a three-stage and two-stage IF band filter; Three-gang variable tuning capacitor

Range automatic controller (change of coupling with the 1st IF bandfilter), with tone quality automatic controller combined: Language - music switch: Volume control before the 1st NF stage

Three-fold decrease reconciliation, on mixer-, IF- and NF stage working co-ordination
Tuning indicator in form of a magic eye

Wood housing: Electro-dynamic loudspeaker

The use of steel tubes became as well known first only for alternating current receivers and for such over Rm. 285,00 and/or RM. 280.00 retail price approved, because it was not possible to produce from these new tubes in the first year so much that an indiscriminate assembly of the receivers would have been feasible. It would be however nothing wronger than that to want to conclude from the restriction of the steel tube price groups higher on the devices that this kind of tube would be applicable evenly only for the expensive receivers! In the opposite, straight for the receivers of low and middle price classes, will steel tubes the great importance attain, are nevertheless possible it with their assistance not to increase the achievement of these devices inconsiderably without for this higher expenditures would have to be made. An interesting example for this is the steel tubed Superhet Saba 455 WK, which niedrigst to permissible steel-tubed receiver price on the market was brought - the costs RM. 280,00, and which is anxious in addition to use the progressive technology steel-tubes fully. In the progression this receiver the standard super of the German market enspricht, i.e. it consists of the mixer, an intermediate frequency stage, the receipt electric rectifier, a NF preliminary stage and the output stage. At the entrance of the equipment zweikreisig it is band filters intended, in order to suppress disturbances by image frequencies. The selection means of the intermediate frequency amplifier are formed for band filters by dreikreiseg it and zweikreisig it, about which the first earns completely special attention: The second -- thus the middle -- circuit is used here for the bandwidth control, such that the position of its is changed at the same time to the coil first and that of the third circle. Beside its ground connection this adjustable circuit does not possess any connections outward; it can be trained consequently not only extraordinarily absorption-poor, but also all difficulties always resulting in from the inlets come themselves into abolishment. Band filter curves and bandwidth control are therefore from ideal form. Under supports becomes the bandwidth control by a bass/treble compensation, thus by a low-frequency working tone quality automatic controller, which represents circuit-moderately nothing different one, as a variable inverse feedback, which pre-amp tube between the anode of the output tube is arranged. With the help of this automatic controller one can raise the high or the bass tones after choice; the arrangement is thus superior to the usual bass/treble screen, with which the high tones are only cut off. To these means of the effect on the frequency band shown by the loudspeaker finally still another language music switch comes, by which a condenser switched into the inverse feedback way can be short circuit. The progressive characteristics of the steel tubes come primarily in the excellent short wave part of the equipment to the expression, considerably above all also by the fact that the KW range was partitioned considering the good efficiency of the receiver on short waves. In order to guarantee a very good synchronisation of the vorkreis and oszillatorkreis it also with the KW receipt -- a characteristic by the way, which is often neglected enough, received each short wave coil in entrance and in the oszillatorkreis their own trimmer.

It is not amazing therefore that the receiver on the short waves offers an extremely large selection of transmitters and in its sensitivity appears practically unrestricted, particularly since those does own liberty of frequenzverwerfungen the ihrige to the steel mixer tube, in order to maintain the optimal tuning of the equipment also when strong fluctuations the field strength. Also another important characteristic of the steel tubes, namlich the possibility of the automatic low-frequency regulation, is here used; the decrease reconciliation of the equipment affects on three stages, except on the mixing and the IF- stage also the low frequency - preliminary stage, in which the amplifier system of the magic eye EFM11 is used. Dadutch becomes the range of the automatic volume regulation in relation to the landlaeufigen design standard - Supers inconsiderably does not extend, a characteristic, which likewise primarily KW - receipt benefits. The advantages of the new Saba - equipment lie however not only in tubes and circuit, but also in the mechanical structure. In the equipment new spulensaetze are used, with which the Amenit - cam-operated switches directly at the lower end of the coils - is arranged carrying construction, so that the switches with the spulensaetzen form a unit; this mechanically and electrically equal high-quality design brings a substantial reducing in price in relation to the earlier arrangement also -- in the rest of perfectly totally enclosed -- the variable capacitor was again designed; consequently the stators were stored with the help of ceramic spacer distance pieces in the pulling tub, the dielectric losses remain very small. The current supply at the rotors takes place -- at each rotor for itself -- via strong leaf springs with precious metal contacts, in order to secure small transition resistance and avoid interruptions. A finely ueberestzter flywheel drive makes a sensitive and exact tuning possible. To these receivers -- which applies likewise to the other Saba receivers of this year -- in addition, the radio practical man in the workshop to apply, thought large interest one into to him and its desires nevertheless more, than it is customary. The receiver rack is particularly easy with this equipment to develop; one does not need to unsolder the loudspeaker cord, but one has to pull only a vierpoligen plug, in order to separate with grasps all loudspeaker connections. The scale is down developed on the rack, and also the magic eye is down inserted, so that these two parts can to be comfortably pulled out with the chassis and no separate treatment require. A removable base plate makes it possible to approach to the most important measuring points and parts at all without development of the equipment. Also all abgleichschrausind easily accessible; as far as the alignment elements lie in the pots, are screw after acceptance of a cap attainable, by which alignment openings can be locked later again; thus that is protected surely inside of the coil pots against making dust.
Erich Schwant

Please note that I have intentionally NOT CORRECTED all of the text above in order to help stimulate the interest within the English-speaking members, and to encourage all members to add possible items of interest to the models with non-typical circuits, and receivers introducing exceptional merit.

PS: I have received much technical assistance from several members thus far, and offer special thanks to Herren Hauf and Menke.
Thomas Günzel
  2 Liebe Saba Freunde,

Anbei noch der Originalbericht aus der Funkschau 03/1939


Viel Spaß beim Lesen

Omer Suleimanagich

What an advanced radio for 1939!

Thanks Robert for presenting this information.

Recently, I found this radio, Siemens 13W,  on EBay(see attachment), and I am fascinated at the build quality of a radio and the technology used for its time.  Especially considering that this radio was manufactured in the middle of WW II.

If the radio is working per EBay ad, I might consider just running it on its original caps(please let me know if there are other suggestions to retain the value of this radio)


Hits: 2664     Replies: 7
saba: 455WK; Schematic and apparent circuit changes
Robert Sarbell
  1 Greetings Collectors and Restorers

During recent posts to forum thread Meine Kartei (id=36275), by Herr Denoth and Herr Boeder, and an item that I had also added, it was suggested that I post this request to determine if any member may have experienced similar events while attempting to repair and restore a Saba model S 455WK that is in excellent overall condition.

Herr Denoth and Herr Boeder (and Mr Ernest Erb) discussed several items - one of which listed the merits of having an individual member's collection of models made available for on-line search by other members for various reasons. Very good supporting points were made to allow for this procedure. In this specific instance, I have begun a very slow search by reviewing the collections that are available to see if I am able to more easily determine who may have a "functional" model Saba S 455 WK radio to contact directly for repair assistance or for other specific data??

Would the existing software programs allow an individual member to make his collection data available to the entire membership (at his option), and with some specific items restricted - if he desires? At this time, I must review each/every member's collection data to see if he has the specific model that I am interested in.

Presently, I have detected several items that do not agree between the schematic and the actual radio. Additionally, many of the capacitors have no rating data on them . . .only what appears to be model number/item number stamped on them.

I have seen very little technical information on the forums that relate to the early receivers with the variable bandwidth circuitry.

Mit freundlichen Grüßen,
Eilert Menke
  2 Good morning Robert,

I own an electrically good set, but it's definitly dead, because the capacitors in the IF-filters are the reason for the problems. These capacitors looks like ceramic disks but it's a silver-mica compound. It's very difficult to reach this pieces in the filter cans. The complete chassis must dismantle before - too much work for my low spare time yet. So im very sorry :-(


Robert Sarbell
  3 Good Morning Eilert,
I agree that it does take some time to get the chassis out of the radio - however, once out, the "cylinder covers" remove easily enough. It appears as though MANY years ago someone (added. . .may have. . . .) intentionally adjusted "full out" some of the trimmer caps. I have read years ago that there were "programs" instituted by both War Ministries -mine and yours- to . . . ."seriously disable" any broadcast receivers that had LW or KW capabilities which could adversely impact War efforts.

Eilert, Is it possible this receiver may have been "disabled" some time nearly 60 years ago and was never "restored" for whatever reason??

I do know that the capacitors appear to be the original, and the tolerances are incredible for the year 1938. . .187 pF,220 pF, and 440pF all have +/- 2.5%

The variable bandwidth feature, and tone control seem to function normally.

Mit Freundlichen Grüßen,
Eilert Menke
  4 Hello Robert,

that's an interesting question, but for the answer you must know the complete history of your set. In the from the german forces occupied countries at WW II the radio repair shops became the order to a "discrete" disable of the shortwave bands in the radio's they should to repair. For Chechoslovakia this is confirmed in a german collector book (G.F. Abele, vol. 4, p. 223).

At the other hand, during the war time it was for a german listener not allowed to listen to the transmissions from the enemy (eg. BBC London). This was a punishable behavior! Further details you can see here (in the german forum):

I'm sorry, but I am unable to check out the problems of your set 5000 miles away. For serious diagnostic it should be better the radio are here on the table and I take a look into them ;-)

I hope, we will find here another members with experience to solve the problem.

Have a nice evening

Robert Sarbell
  5 Good Morning Eilert,
Thank you so much for the amplifying data. I believe that if any repair attempts would have been made, the technician would have most assuredly have removed one of the 2-section repair cards stapled inside the radio. Since they are still mounted on the rear face of the front panel, it is most likely that an inexperienced individual (or repair technician) would simply disregard removing one of the cards to send it to any Saba office.

I apologize for being too hasty in my request for assistance, since I am awaiting some silver-mica caps which are as closely rated to the originals as possible. If there any members who have replaced them, it would be helpful to know how critical the values should be to maintain the 487kHz for the ZF.

I hope to report success soon, and stand ready to assist any other member who may be interested in my experiences (with many detailed photos of components).


Hans M. Knoll

hello Robert,

additional you can find, two origin. Saba Prints. First the Diagramm wihout Dimensions. Second, the Partlist with Postition Numbers and Dimensions.

I dont now, if the Numbers the same as i the Set on the Parts.

Maybe it is helpfull for you.

What is your Problem abaud the IF frequency?
Recommendet is 487 Kc ,  
plus minus 2 Kc.(recom. knoll)

But all Circuits must be on the same frequency.

a question to the position off the Trimmer Caps.´s
Was the Set betwen 1939 and maybe 1955 locatet in W-germany?

Greadings from Franconia

Hans M. Knoll


Robert Sarbell
  7 Hello Hans,
Thank so much for the Circuit data and the parts list. Also , please accept my apology for not posting within the last few days I received from Herr Werner Hauf - one of our members - also a parts list, schematic and other pages from original SABA technical data. I am still reviewing the pages.

When I began to replace capacitors, all Saba caps have only part numbers on them; nearly every capacitor under the chassis appeared "undisturbed" from original; the few Frako electrolytics have printed ratings. The 2 power supply caps were original Saba 580/81-14A, and the block condenser was NSF (maker) with PN 580/82 2x0.85uF

Reference the IF: On cylinder 2 (Mixer stage), both trimmer capacitor adjustment screws were adjusted very far "out". I suspected the IF to have a critical tolerance - considering the +/- 2.5% tolerance on the edge of the silver-mica caps.

I am still investigating ownership and location of the receiver in its earliest years - I have been told the original owner was a gentleman who was about 80 to 82 years old. . .name was Robert Rammings - a civil engineer for the city of Lockport, New York

One last item, all 5 of the tubes were the original Telefunken with date codes of ul/9-38, ul/9-38, hg/10-38, hg/10-38, and EL11 output coded 141 (12-39)??

The large circular silver-mica caps (187pF and 440pF) at the bottom of cylinder 3 (oscillator), appear to have cracks in the sealant. Awaiting replacement.

Also thank you so much for the Perlonseil threads for my 5040W/3D that Herr Michael John forwarded with the dial glass and other parts.

Hans M. Knoll

Hello Robert,

thanks for your answer. The reason for my quenstion, abaud the history of the set is:

Original was the Set designed (1938) to receive on Mediumwave Frequencys between 510 to 1500 Kc.
In 1950 the Medium  Range was exdendet  to 510 to 1602 Kc. 
See here my words  in german:
Der Wellenplan von Kopenhagen.(1)
Im Nachgang zur Welt-Funkkonferenz von Atlantic City / USA im Jahr 1947, wurde in der Zeit vom 15.Juni bis 15.Sept. 1948, in Kopenhagen ein neuer Wellenplan für Europa erarbeitet. Benannt nach der Stadt Kopenhagen, trat er am 15. März 1950 in Kraft. Er löste den im Jahr 1933 in Luzern beschlossenen Vertrag ab.

Many Stations in W- Germany  was moved above 1500Kc.
For example:
nach Plan:
NWDR ( nordwestdeutscher rundfunk)   = 1586kHz
Nuernberg = 1602 kHz
AFN = 1554 kHz
SWF (Suedwestfunk Baden-Baden) = 1538 kHz

All the german  radios  must change from the upper end 1500 kc to 1602 Kc.
To achieve this , the "Trimmers"  must were =adjusted very far "out".
In some sets is it necessary to pull out the whole capacitors and Trimmers  on the tuning condenser or reduce the winding of the coils! ( Volksempfaenger)

O.K. Robert,
 this was my Answer. I am standby for other questions.

Have a good time,  Hans


see also :

SABA; Villingen: SABA S-455WK 455WK
End of forum contributions about this model