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Bildmeister FT75

Bildmeister FT75; Siemens; D S.& (ID = 605640) Television
 
Bildmeister FT75; Siemens; D S.& (ID = 605641) Television
 
Bildmeister FT75; Siemens; D S.& (ID = 605642) Television
 
Bildmeister FT75; Siemens; D S.& (ID = 605643) Television
 
Bildmeister FT75; Siemens; D S.& (ID = 605644) Television
Bildmeister FT75; Siemens; D S.& (ID = 1394110) Television Bildmeister FT75; Siemens; D S.& (ID = 291349) Television
Bildmeister FT75; Siemens; D S.& (ID = 1394111) Television Bildmeister FT75; Siemens; D S.& (ID = 1394112) Television
Bildmeister FT75; Siemens; D S.& (ID = 1394115) Television Bildmeister FT75; Siemens; D S.& (ID = 1394120) Television
Bildmeister FT75; Siemens; D S.& (ID = 1394125) Television Bildmeister FT75; Siemens; D S.& (ID = 1394126) Television
Bildmeister FT75; Siemens; D S.& (ID = 1394127) Television Bildmeister FT75; Siemens; D S.& (ID = 1394129) Television
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Bildmeister FT75; Siemens; D S.& (ID = 1394110) Television
Siemens; D S.&: Bildmeister FT75 [Television] ID = 1394110 933x700
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For model Bildmeister FT75, Siemens; D (S.& Halske / S. Electrogeräte)
 
Country:  Germany
Manufacturer / Brand:  Siemens; D (S.& Halske / S. Electrogeräte)
Year: 1965/1966 Category: Television Receiver (TV) or Monitor
Valves / Tubes 13: AW59-91 PC900 PCF801 EF80 EF183 PCL86 PCL84 PCH200 PCL85 PCF802 PL500 PY88 DY86
Semiconductors (the count is only for transistors) 4:
Main principle Superheterodyne (common)
Wave bands Wave Bands given in the notes.
Details Radio Control (+Remote Wire etc)
Power type and voltage Alternating Current supply (AC) / 220 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical
Power out
from Radiomuseum.org Model: Bildmeister FT75 - Siemens; D S.& Halske / S.
Material Wooden case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 705 x 495 x 315 mm / 27.8 x 19.5 x 12.4 inch
Notes VHF/UHF. Auf Wunsch Einschraubbeine.
Net weight (2.2 lb = 1 kg) 31 kg / 68 lb 4.5 oz (68.282 lb)
Price in first year of sale 798.00 DM
Source of data Handbuch VDRG 1965/1966

Model page created by Bernd P. Kieck. See "Data change" for further contributors.



All listed radios etc. from Siemens; D (S.& Halske / S. Electrogeräte)
Here you find 2437 models, 2016 with images and 1276 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Siemens; D S.&: Bildmeister FT75
Threads: 1 | Posts: 3
Hits: 1709     Replies: 2
siemens: FT75 (FT 75); Bildmeister
Perica Adnadevic
30.Mar.09
  1

Hello, old electronic friends'

I have this beautiful old Siemens TV, in very good condition,

All tubes are original from a factory, including picture tube-Siemens made.

Only problem is bad reception on UHF band.

Is it a problem with AF139 transistors,and what else can bee the reason.

Does anybody has a electrical diagram of this set.

Thanks in advance,Peter.

Torbjörn Forsman
06.Apr.09
  2

A very common cause for bad UHF reception in sets of the same generation as your Siemens set, is that the series (dropper) resistor for power supply to the UHF tuner has got open circuit or changed value. Typically, this is a 2 or 4 W resistor of perhaps 33 or 47 kohm resistance. This will cause too low supply voltage to the tuner, normal voltage uses to be 9 - 12 V.

Another possibility could be a problem with the VHF/UHF switching. In UHF mode, the RF amplifier and local oscillator of the VHF tuner should be stopped, usually by disconnecting the anode voltage from the respective valves. In some sets, the grid of the mixer valve PCF801 is connected to AGC voltage at UHF (it is running as first IF stage in this mode), but it should be at ground potential at VHF reception, where the RF valve is instead controlled by AGC. The main reason for this design was that the AF139 transistor is not suitable for AGC control.

Anyway, circuitry around the tuners was relatively well standardized in the mid-60's , and you would certainly be helped by studying a schematic for any european tv with a similar tuner layout.

Perica Adnadevic
29.Apr.09
  3

Thanks Torbjorn,

I tried everything You suggested and found the problem.

It was the VHF-UHF switch.

Thank You,Peter.

 

 
Siemens; D S.&: Bildmeister FT75
End of forum contributions about this model

  
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