philips: Please check documents. |Radiomuseum.org

philips: Please check documents.

28.Jun.10 17:04

58

Paul E. Pinyot † 2013 (USA)
Articles: 187
Count of Thanks: 7

To the administrator.

At your convenience, please check two of the document pages. The first is, the schematic. The second page is of the top of chassis part locations.

There seems to be a second image on the PDF documents. This image obscures (hides) the main image of that page.

I would have fixed and uploaded a revision if I had PDF editing software.

Thanks,

Paul

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document

29.Jun.10 08:07

58 from 3417

Martin Renz (D)
Officer
Articles: 694
Count of Thanks: 5

Hello Paul,

yes this is a faulty document. As the graphics are merged together as one object within the pdf, there is no chance to separate them. You could ask the uploader Iven Mueller, if he can upload a better version. Other RM Members might have copies of this schematic, you could ask Walter Groer for example and/or activate the "I need this schematic" search function at the model page. This will be visible for the German speaking community as well.

respectfully

Martin

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? Longwave external antenna connection not working. HELP PLS

16.Aug.10 19:13

228 from 3417

Paul E. Pinyot † 2013 (USA)
Articles: 187
Count of Thanks: 14

Marin,

Thank you for the reply. I looked for Iven Muellen and did not find his listing. But it looks like he has a lot of relatives in the members listing :)

I am now stuck and need some help or a clean top chassis parts location picture. The Long Wave band will not utilize the external AM antenna connector. I am having great difficulty in reading the Phillips schematic symbol for the rotary wafer switches. Most difficult is with the switch on the rotating antenna.

The Long Wave receive well when the rotational antenna in engaged but does not receive when the internal rotational antenna is off and parked. I have synchronized the switch on the rotating antenna.

The external AM antenna connector functions on broadcast and SW.

I am stuck. Any help is appreciated.

Paul.

-----------------------UPDATE---------------------------

Gentlemen,

I believe that I have a solution. After a fine nights rest it occurred to me to look at a similar model. The B7X82a has the same RF front end (including the internal antenna) as this radio.

I have printed out the proper pictures and schematic and will attempt to diagnose the lack of external LW antenna connection.

I will report back later!

Thank for all the input

Again RM.org to the rescue!

BTW - Does any one have hints on how to read the Philips SK15 schematic switch diagram? I am unfamiliar with how the wiper is associated with what numbered contact? It looks like a jumble of lines to me. There must be a trick or system.

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? Is this the correct Antenna Coil part number?

18.Aug.10 00:15

317 from 3417

Paul E. Pinyot † 2013 (USA)
Articles: 187
Count of Thanks: 6

The bottom coil is S16 and its slug to peak 155.5khz long wave band. It will not peak. This coil is between the external antenna connector and the ECH81 first stage RF. When this coil is out of the circuit, as when the internal antenna is used the LW receives OK. No upper harmonic BC stations.

Comparing the part number with the list on the Alignment page they do not match. It seems highly unlikely this coil was replace with a wrong resonant frequency unit. It passes signal when screwed all the way in. It also passes harmonic frequencies from the BC band.

I opened up this coil to check. And it looks ok. The coils line up on the correct solder lugs. The slug is moving in and out with the set screw.

The antenna switch checks out OK. I used the B7X82a diagrams that matched just about perfectly.

I am at my wits end. Any ides on how I should proceed?

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schematic fixed

21.Aug.10 07:14

392 from 3417

Martin Renz (D)
Officer
Articles: 694
Count of Thanks: 4

The damaged schematic is fixed, now there are two parts of this schematic without faults.

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I have acquired a good signal peak for S16

24.Aug.10 06:25

455 from 3417

Paul E. Pinyot † 2013 (USA)
Articles: 187
Count of Thanks: 4

Gentlemen,

I have acquired a good signal peak for S16. I could not obtain and adjust through a peak until I moved one of the internal ferrite bars about 3mm. The internal ferrite bar that I moved now spans the complete top coil (as it was origonally) and a little more (3mm) of the bottom. I now can adjust the movable ferrite bar (slug) into the coils obtain a peak and have about 1.5 turns of decline on the other side of peak.

The external Long Wave (LW) antenna now receives beacons (the only thing on LW local to me) as well as any other restored radio.

Thank you to all that helped. There were few that corresponded with me on private e-mail that are “behind the scenes”.

The explanation (private e-mail) of how to interpret the rotary switch schematic symbol helped me immensely! I hope that explanation is posted in the forum help/tech tips section.

Paul.

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