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Old 29th September 2007, 08:57 PM   #51
Thomo is offline Thomo  United Kingdom
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Hi Andy, I bought mine thinking it would contain a tda1541 s, but as far as I can tell, it's just the standard chip.

I don't suppose you could shed any light on why I have trouble feeding the saa7220 from a separate reg could you please?

ps How cold is it up your way near Norway?

Lee.
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Old 29th September 2007, 11:19 PM   #52
poynton is offline poynton  United Kingdom
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Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)
Unfortunately not.
I do have some notes at home gleaned from this forum.There has been quite some discussion re separate regs. You could try searching for chips in the same family, cd104 etc. if there is no joy with the SAA7220.

Have you read this thread ?

Saa7220 sparks from ground pin (killed a saa7220 ?)


64N is cold and gloomy but the severe weather of the last 2 weeks has gone for a few days so at last we can do some work.


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Old 1st October 2007, 08:51 AM   #53
Thomo is offline Thomo  United Kingdom
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Thanks Andy, but I'd already read that thread. I have given up on running the 7220 from a separate tx, and have instead just added another 5v reg and tapped the supply from the existing 5v supply. It works perfectly, so it must have been a grounding issue.

I will use the spare winding on the tx to power the dac -15v or maybe the servo section under the mech.

Cheers,

Lee.

ps Anyone know where I can get a 16pf 0805 ceramic cap from? It's for my clock so I can use it in this player. I need small quantities and farnell require 20 minimum order.
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Old 1st October 2007, 10:43 AM   #54
poynton is offline poynton  United Kingdom
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Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)
Quote:
Originally posted by Thomo
Anyone know where I can get a 16pf 0805 ceramic cap from? It's for my clock so I can use it in this player. I need small quantities and farnell require 20 minimum order.

I have bags of small value silver mica and ceramic caps at home !!!!

Try Ebay. There is a seller in Widnes, Auntyant2, who does bags of caps and other useful stuff. reasonable prices.


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