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 Post subject: Philips Model A3 259 14 Radio Question
PostPosted: Dec Wed 06, 2017 4:08 am 
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Joined: Sep Thu 11, 2008 4:43 pm
Posts: 328
Location: Miami, FL
I'm restoring a Philips Model A3 259 14 radio and I can't find any schematics. There appear to be two resistors going to an EZ80 tube. They each start smoking when the radio is turned on. I can't tell what value they are because they have no markings, only an orange dot painted on one end.


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Last edited by elduende on Dec Wed 06, 2017 1:23 pm, edited 1 time in total.
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 Post subject: Re: Phiilips Model A3 259 14 Radio Question
PostPosted: Dec Wed 06, 2017 4:53 am 
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Joined: Jan Tue 31, 2012 1:55 am
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Location: Mountains of Mourne. Ireland.
A3 259 14 is not the model number... :)

It will be listed as Type on the Masonite back or on the chassis as seen here.

Image

Image
from here: https://www.radiomuseum.org/r/philips_b3ln66u_35.html

Greg.


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 Post subject: Re: Phiilips Model A3 259 14 Radio Question
PostPosted: Dec Wed 06, 2017 11:25 am 
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Location: Victoria, Australia
Is this an example of turning it on unchecked to see if it works? The highest probability, with a set like that is: It won't. That sort of practice commonly gives me extra, often expensive work, repairing the avoidable damage.

Two resistors the same, of a type I find unreliable, as the cap comes off, suggests that they are on pins 1 & 7 of the EZ80 (6V4). If so, apart from surge control, these are usually a low wattage resistor, or a "Fusistor" the purpose of which is to self destruct on overload. If you have not checked or replaced all of the electrolytic capacitors & checked it for shorts & deterioration & wax paper caps which I suspect it has: Stop now.
and inspect it.

Marc


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 Post subject: Re: Philips Model A3 259 14 Radio Question
PostPosted: Dec Wed 06, 2017 1:27 pm 
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Joined: Sep Thu 11, 2008 4:43 pm
Posts: 328
Location: Miami, FL
There is no label on my radio, only a space above the "A3 259 14". And no, this wasn't turned on unchecked. It had already been worked on and it was working for a few days then the reception started fading and the resistors started smoking.


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 Post subject: Re: Philips Model A3 259 14 Radio Question
PostPosted: Dec Wed 06, 2017 11:27 pm 
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No clarity, as to where the resistors are? I am at this point, not convinced that something (including rectifier) is not shorting.

Marc


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 Post subject: Re: Philips Model A3 259 14 Radio Question
PostPosted: Dec Thu 07, 2017 12:09 am 
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Location: Mountains of Mourne. Ireland.
Can you post a photo of the front of the radio
and a top-view of the chassis?

What are the tubes in your radio?

Greg.


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 Post subject: Re: Philips Model A3 259 14 Radio Question
PostPosted: Dec Thu 07, 2017 5:11 pm 
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Joined: May Sat 06, 2006 4:03 am
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Location: ZIP 23831 South of Richmond, VA 25 miles down the pike.
What are the measurements on both, same resistance? Not too many pins available for connections. One resistor generally for divider connected to pin 3 (guess). Possible resistor from who knows where to filament for ground. Where do the other ends connect?

Bill J.


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 Post subject: Re: Philips Model A3 259 14 Radio Question
PostPosted: Dec Fri 08, 2017 1:58 am 
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Joined: Sep Thu 11, 2008 4:43 pm
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Location: Miami, FL
Here are some photos of the radio including the tube placement found on the back cover.


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20171207_195613.jpg
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 Post subject: Re: Philips Model A3 259 14 Radio Question
PostPosted: Dec Fri 08, 2017 3:20 am 
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Joined: Jan Tue 31, 2012 1:55 am
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Location: Mountains of Mourne. Ireland.
You have seen the record changer... right... Lol

Philips H5X 68 A manufactured in Holland 1956
19 page service manual in English... :)
https://www.doctsf.com/grandlivre/fiche ... 759&ori=ps


Greg.

oh... The doctsf.com (télégraphie sans fil) pdf's are untagged, you may have to add .pdf to the end of the downloaded file!

Edit: Codification des appareils Philips.
https://www.doctsf.com/dossiers/codif_philips.php


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 Post subject: Re: Philips Model A3 259 14 Radio Question
PostPosted: Dec Sat 09, 2017 5:54 pm 
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Joined: Sep Thu 11, 2008 4:43 pm
Posts: 328
Location: Miami, FL
Thank you! This is great.


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