F3 and F4 Clone PCB Reissue group buy, also F5 PCBs - Page 62 - diyAudio
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Old 3rd February 2009, 10:41 PM   #611
rigma is offline rigma  United States
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Just to be sure it is 10,000uf?
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Old 3rd February 2009, 10:46 PM   #612
Tea-Bag is offline Tea-Bag  United States
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Quote:
Originally posted by rigma
Just to be sure it is 10,000uf?

Rigma,
For F4 on Peters PS boards,
I used four 33,000uf Panasonic TSUP
Digikey P6924-ND

For F5, I went overboard and ordered 4 P10014-ND 47,000uf each. Probably way overboard.

TEA-BAG
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Old 3rd February 2009, 10:48 PM   #613
rigma is offline rigma  United States
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Thanks tea-bag

rigma
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Old 3rd February 2009, 10:50 PM   #614
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We are talking about BOM as attached. It does not say actual value but "> 100000uF - 35V" which could mean that 10,000uF is a minimum (100000 is a misprint). I would go higher though, at least 4 x 15,000uF per channel.
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File Type: pdf f4-parts.pdf (28.5 KB, 78 views)
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Old 3rd February 2009, 10:53 PM   #615
rigma is offline rigma  United States
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Thanks again Peter.

rigma
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Old 5th February 2009, 01:35 PM   #616
adn6244 is offline adn6244  Singapore
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Quote:
Originally posted by Diomedian
It has previously been noted that the lead spacing of the resistors was 0.2", and that Peter recommended Vishay CFM-50 or Caddock MK132 resistors, both of which have 0.2" lead spacing. The Dales you use there are CFM-55s (or their military equivalent).

-j
I have a stupid question to ask here.

I went around searching for cmf50 and noticed that most of the stock mouser has is only 1/4W or 0.25W whereas MK132 smallest is 0.75W.

appreciate advice what is the minimum requirement as the range is quite big from 0.25W to 0.75W.

Thanks again
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Old 5th February 2009, 01:37 PM   #617
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0.25W should not be a problem, higher wattage will work fine too.
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Old 5th February 2009, 01:45 PM   #618
adn6244 is offline adn6244  Singapore
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Peter,
Thanks for the fast reply and the nice work on the pcb. I'll proceed with my parts order then. Wanted to get the F3 from you but it's out of stock...guess I'm late again!
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Old 5th February 2009, 01:45 PM   #619
npapp is offline npapp  United States
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Default Q1 & Q2

Is it ok to use lsk170 for Q1 & 2SJ74 for Q2?
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Old 5th February 2009, 01:54 PM   #620
adn6244 is offline adn6244  Singapore
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Quote:
Originally posted by Peter Daniel
0.25W should not be a problem, higher wattage will work fine too.
Peter,
my apologies, it's 1/8W for CMF50. Is this too low?
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