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Diode type for Philips AH-673

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Posted on June 24, 2014 at 06:52:37
sherod
Audiophile

Posts: 4842
Location: Texas
Joined: August 3, 2003
 Hello,
I am currently upgrading e-caps in my Philips AH-673 tuner. On the power supply board, there are seven diodes, D501-D507. The service manual only lists the parts #: 530171-1002 silicon diode. Can someone help me with a modern replacement part number? I want to increase the caps values so I want to make sure the new diodes can handle this increase. There is also a zener diode(15V) so I'm not sure if that needs to be upgraded as well.

 

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RE: Diode type for Philips AH-673, posted on June 24, 2014 at 08:09:30
HoosierAudio
Audiophile

Posts: 377
Location: MidWest, USA
Joined: November 28, 2005



Hi sherod,

The Vishay Telefunken SF4007 FRED or the Vishay 11DQ10 Schottky both work well. If you're interested there is a DIY recipe for the 673 over at the Yahoo FM Tuner Group that works quite well. Link attached, you may have to join the group for access. I've done several of these and have always been pleased with the results. Actually its one of my favorite tuners.

Its a pain to get to but don't ignore the recap on the switch board.

HA

 

RE: Diode type for Philips AH-673, posted on June 24, 2014 at 15:43:41
sherod
Audiophile

Posts: 4842
Location: Texas
Joined: August 3, 2003
 Thanks for the link. I have already recapped the switchboard.

 

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