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Philetta 284 de Luxe BD284U LW/MW/KW/UKW

Philetta 284 de Luxe BD284U; Philips Radios - (ID = 14836) Radio
 
Philetta 284 de Luxe BD284U; Philips Radios - (ID = 14837) Radio
 
Philetta 284 de Luxe BD284U; Philips Radios - (ID = 2491975) Radio
Philetta 284 de Luxe BD284U; Philips Radios - (ID = 1982529) Radio Philetta 284 de Luxe BD284U; Philips Radios - (ID = 724643) Radio
Philetta 284 de Luxe BD284U; Philips Radios - (ID = 1241113) Radio Philetta 284 de Luxe BD284U; Philips Radios - (ID = 1241118) Radio
Philetta 284 de Luxe BD284U; Philips Radios - (ID = 395174) Radio Philetta 284 de Luxe BD284U; Philips Radios - (ID = 27915) Radio
Philetta 284 de Luxe BD284U; Philips Radios - (ID = 395178) Radio Philetta 284 de Luxe BD284U; Philips Radios - (ID = 27913) Radio
Philetta 284 de Luxe BD284U; Philips Radios - (ID = 395177) Radio Philetta 284 de Luxe BD284U; Philips Radios - (ID = 1241112) Radio
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Philetta 284 de Luxe BD284U; Philips Radios - (ID = 1982529) Radio
Philips Radios -: Philetta 284 de Luxe BD284U [Radio] ID = 1982529 1400x1004
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For model Philetta 284 de Luxe BD284U LW/MW/KW/UKW, Philips Radios - Deutschland
 
Country:  Germany
Manufacturer / Brand:  Philips Radios - Deutschland
Brand
 
Deutsche Philips-Ges.
Year: 1958/1959 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 7: UCC85 UCH81 UF89 UABC80 UM80 UL84 UY85
Main principle Superheterodyne (common); ZF/IF 460/10700 kHz
Tuned circuits 6 AM circuit(s)     11 FM circuit(s)
Wave bands Broadcast, Long Wave, Short Wave plus FM or UHF.
Details
Power type and voltage AC/DC-set / 110; 127; 220 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical
Power out
from Radiomuseum.org Model: Philetta 284 de Luxe BD284U [LW/MW/KW/UKW] - Philips Radios - Deutschland
Material Moulded (Bakelite or Plastics)
Shape Tablemodel, Mantel/Midget/Compact up to 14" width, but not a Portable (See power data. Sometimes with handle but for mains only).
Dimensions (WHD) 320 x 196 x 166 mm / 12.6 x 7.7 x 6.5 inch
Notes

UKW 87,5 - 100 MHz.
Siehe auch Exportausführung BD284U -46 ... -49 mit UKW/FM bis 108 MHz.

Net weight (2.2 lb = 1 kg) 3 kg / 6 lb 9.7 oz (6.608 lb)
Price in first year of sale 225.00 DM
Source of data HdB d.Rdf-& Ferns-GrH 1958/59 / Radiokatalog Band 1, Ernst Erb
Literature/Schematics (1) -- Original-techn. papers.


All listed radios etc. from Philips Radios - Deutschland
Here you find 2506 models, 2225 with images and 1516 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Philips Radios -: Philetta 284 de Luxe BD284U
Threads: 3 | Posts: 17
Hits: 352     Replies: 2
philips: Philips BD284u. Loud hum.
Phillip Yannone
09.Oct.19
  1

When switching on I get a loud hum on all bands. I have replaced many capacitors and all the tubes but there is no change. Wattage use on warmed radio is 33 watts. 

My schematic shows standard European voltage 220 volts. I assume the voltages listed on the schematic relate to the 220 volts. As I live in the USA the line voltage is 120 volts so my measured voltages are lower. 

As I am very new at this, especially German radios, I am having trouble identifying some components. Is there a component identification sheet available for 1950's and 1960's German radios?

Thank you for any and all help that can be provided. Phillip Yannone.

Marc Gianella
15.Oct.19
  2

Philipp,

First of all I have some questions.

Do you know that your radio is not isolated from mains and you’re aware about the danger.
Are you using an isolating transformer or a variac when working on the set?

Do you have exactly this model or the export variant labeled with the suffixes -46, -47, -48, -49 ?

Which capacitors have already been changed?  What about the electrolytic filter capacitors?
Do you have an underneath picture, maybe before and after changes?

What kind of measuring device (multimeter) do you have?

Generally it is not a good idea changing capacitors indifferently.

 

Regards, Marc

Phillip Yannone
16.Oct.19
  3

Thank you Marc for your reply, The model is BD 284U no suffix (Philetta 284 de luxe). I'm aware it has a hot chassis and when working on it plugged in its through an isolation transformer. All electrolyics are replaced. All replaced caps tested Leakey at low voltage. My test meter is a Fluke 21.

I have to say that since the post the problem is resolved. It was a broken ground on the uabc80. That has a rubber mounted base. Since the repair the radio is working quite well. There is slight station drift between cold radio and warmed up.

 
Hits: 4326     Replies: 12
philips: BD284U (BD 284 U); Philetta 284 de Luxe
Alfred Pugliese
11.Nov.09
  1

Hi all.....This is a great little radio. AM and SW work fine, Nothing on FM. The schematic is a bit difficult to read. Can someone tell me where to start trouble shooting FM?  All tubes are good, and contacts cleaned. Thanks    AL

Jean-Pierre Waymel
08.Dec.09
  2

Hello Alfred,

1. Did you test the FM IF stages with a 10.7 MHz signal generator ?
2. Is the local oscillator working when FM is selected ?

What kind of test equipments you may use ?

I go and print the schematic to have a closer look.

Kind regards.

Jean-Pierre Waymel
09.Dec.09
  3

Alfred,

Please don't feel offend if I give you obvious recommendations as I am not accurately aware about your knowledge in “electronics” (although I have read you have restored 100’s old radios).

1. First of all, for your own safety, please (!) : use an insulation transformer as the mains is connected to the chassis...

2. For the following tests 3 and 4, depress the FM key to be on FM mode.

3. FM local oscillator/mixer (“right” ½ UCC85) : verify the anode voltage.
If you have an oscilloscope, you may easily verify if the oscillator oscillates...

If this stage is working, you have to go from the loudspeaker to the antenna to verify the full FM line (an alternative method is to verify first the IF 10.7 MHz stages, as you want...).

Let us go from the loudspeaker to the antenna !

4. FM AF switching
u25 – u26 must be opened,
u26 – u 27 must be closed.

Touch the R41/C75 commun point with a screwdriver (or better : connect to this point a AF generator through a 0.1 µF capacitor) : you must hear some hum (or the signal tone) in the loudspeaker.

That are the very first tests.

Please give me your feeling and test results if any.

Kind regards.
Jean-Pierre

Alfred Pugliese
09.Dec.09
  4

Thanks Jean.....I gave up on this one...but with you on board, I will re-open the case. I will get to it, and let you know my findings...AL

Jean-Pierre Waymel
10.Dec.09
  5

Ok AL,

In order to try to give you the more suitable advices, what test equipments do you own ?

Jean-Pierre

Alfred Pugliese
10.Dec.09
  6

I have been getting by with digital Meter....for voltages and ohms. Thanks  AL

Jean-Pierre Waymel
10.Dec.09
  7

Ok AL for your digital multimeter.
If we are lucky, it will be fine...

Don't forget for your safety to use a real insulation transformer between mains and your radio set...

Jean-Pierre

Alfred Pugliese
13.Dec.09
  8

Hi Jean.....OK I got the radio back on the bench. All I get is a low buz on fm ( am works great) its diffiult to find the points you suggested to check what pin on the ucc85 is the anode? u25 26 27 where can I find these points along with r41 c75. I see them on schematic, but difficult to locate inside radio..very tight cramped set.....thanks  AL

Jean-Pierre Waymel
13.Dec.09
  9

Hi AL,

Thank you for your answer.
May I suggest you to print the schematic ?
Or far better : put it on your disk, then you may easily widen it to save your eyes !

what pin on the ucc85 is the anode? 
Look at this fantastic schematic now on your screen :-) : pin 6.
This is for the "right" triode, the FM/UKW local oscillator.
You'll see on the schematic that the high voltage is switched by u15 - u16 :
in FM, this switch is closed in order for the FM local oscillator... to oscillate,
in AM, this switch is opened to stop this oscillator.

Generally speaking, the switches "uxx" are "active" in FM/UKW mode : "u" stands for UKW.

As you are near this tube, you may also verify if the VHF amplifier is well powered.
This is the very first stage, the "left" part of the UCC85.
The anode is pin 1.
The high voltage is always present even in AM as this VHF amplifier is not interfering in AM...

If you have again a look on the schematic, there are the nominal values :
156 V for the oscillator anode,
144 V for the VHF preamplifier anode.

u25 26 27 where can I find these points ?
All the points as uxxx (and axx for AUS [ON/OFF], lxx for LW, kxx for KW, mxx for MW) are "keyboard" points.
All the points like u25, u26, u27 are indicated in the schematic :
- in the drawing of the theorical schematic,
- in the drawing of the physical keyboard contacts : see the bank of contacts drawn with
"AUS", "LW", "KW", "MW" and "UKW" keys (more or less in the middle of the sheet, just at the left of the mains input, when you look in "landscape" format).
Particular case : for UKW, both MW and UKW banks are to be considered.
The u25, u26, u27 are included in the right column of the MW bank.

Switch off your radio.
Remove the power cable from the mains.
Depress down the UKW key.
Verify with your ohmmeter :
u25 – u26 must be opened,
u26 – u 27 must be closed.

r41 c75 : it's the u26 point on the keyboard.
Power on your radio via an insulation transformer (for your safety...).
Depress down the UKW key.
Put the metallic tip of an insulated screwdriver on u26 (if necessary, connect a long insulated wire to the metallic part of this tool...).
You must hear some hum...

Good luck and take care...
Jean-Pierre

Alfred Pugliese
19.Dec.09
  10

Hello....Its very difficult to make out the pin # because of the cluster surrounding the ucc85. I am getting 95v on one and 112v on another? What is USA # for ucc85 I don't see it in my book. A wax cap marked 470pf ...is that .05mf?....A white tubular with purple on tip, marked 120k ..is that a 120k resistor? Thanks for patience...This is a lot different than the sets I have worked on.....AL

Jean-Pierre Waymel
19.Dec.09
  11

Hi Alfred !

Yes, I do believe it's not obvious to make out the pin # because of the cluster surrounding the ucc85.

UCC85
To find info about UCC85 :
- on the top of the screen, click the green/yellow link "Tubes + Tr",
- then in the first great box "Search for a tube/valve", type UCC85 in the yellow rectangle
  and finally click the red "GO" button.
Normally, you must reach :  http://www.radiomuseum.org/tubes/tube_ucc85.html
The pin number configuration is drawn at the bottom left, seen from pins side as usual.
Be careful : on the right, it's also seen from pins side !
I don't know the US # but you'll see 4 "Identical to" on the top of the page.
You say : "I am getting 95v on one and 112v on another" but I don't know what anode for
95 V (112 V for the other anode, of course).
Could you give me the anode pin for each voltage ?

Wax cap marked 470 pF
Say 500 pF for instance.
500 pF = 0.500 nF = 0.5 nF = 0.000500 µF = 0.0005 µF.
You may also write 500 µµF...
What do you mean with "mF" : millifarad ou microfarad ?
In the old radios, "mF" (or worst : "MF") is not millifarad (or Mégafarad !!!) but... µF !
You say "wax". I think that it's a mica cap or something like that which should be replaced
(if necessary) by a same type (mica) and also the "exact" same value (here : 470 and not 500)
as this cap may be placed into a tuned circuit.
Then question : where is this capa placed ?
Very often, this type of cap is rather reliable for years, but who knows ?!

A white tubular with purple on tip, marked 120k ..is that a 120k resistor ?
Only 2 colors : white body and one purple tip ? Nothing else ? Nothing written on, except 120k ?
"Tubular" : a full tube or a hollow tube ?
Where in the radio ?
Could you take a photo ?

u26
What about a metallic tip of an insulated screwdriver on u26 (if necessary, connect a long insulated wire to the metallic part of this tool...) ?
Did you find u26 ?

No problem for "patience" : it's a hobby...
I do understand this is a lot different than the sets you have worked on.

Have a good sunday.
Jean-Pierre

Alfred Pugliese
21.Dec.09
  12

The 120k is hollow, and goes to ucc85. I cleared the 'tar'/ wax cap....With the 2 feet of snow, and Christmas at our heels..I have to close down shop till 2010! Speaking of which...Merry Christmas...and Happy New Year!  All the best   AL  ( hopefully we can re-open this investigation in the near future)

Jean-Pierre Waymel
21.Dec.09
  13

Hi AL !

120k component
I think it may be C19 in // (VHF point of view) with S19 as the cap of a 10.7 MHz tuned circuit.
120 = 12 followed by a 0 !
i.e. value = 12 multiply by 10^0 = 12 x 1 = 12 pF.
The purple tip may indicate the tolerance or the temperature coefficient or the service voltage for this cap !
Are you sure there are no other colored rings on this component ?

Wax cap marked 470 pF
Why did you remove ("clear" ?) the 'tar'/ wax cap ?
Did you remove the wax from the cap or did you remove the cap from the circuit ? (!)

Snow...
That's wonderful for Christmas, but 2 feet is a little bit high and leading to a lot of troubles in New York, I suppose...
Here, near Paris, there is only 1 inch of snow but some ice on the roads where I'm living.

Have also a Merry Christmas and a Happy New Year, for you and your family !

So long in 2010...

Jean-Pierre

 
Hits: 2285     Replies: 0
philips: BD284U (BD 284 U); Philetta 284 de Luxe -wird se
Michael Huber
11.Apr.06
  1 Hallo,

meine bd284u hat ein seltsames Problem:

Diverse Teile werden sehr heiß!

UL84 115 Grad, R1 110 Grad.

Die Meßwerte sehen so aus: G1 UL84 0V, Kathode UL84 +12,2 V, G2 UL84 170V, C82, C85 und R55 sind ok.

Ich habe jetzt aus schierer Not R55 auf 1,1K verändert, Kathode jetzt +18,3 V, die Temperatur der UL84 ist jetzt 80 Grad, das Radio spielt auch einwandfrei.

Was kann denn da das Problem sein?

Vielen Dank im voraus,

Michael Huber
 
Philips Radios -: Philetta 284 de Luxe BD284U
End of forum contributions about this model

  
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