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Old 4th April 2011, 04:19 PM   #31
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Hi all,
I am getting ready to populate my board. While laying all the parts out, I realized that I had forgotten to order D2-5. Can I use anything else? Say 1n4007's or something else that the shack might have?
Tia,
Al
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Old 4th April 2011, 04:56 PM   #32
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I have 1n4007's. Or should I just order and wait?
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Old 4th April 2011, 06:20 PM   #33
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I also have an 8h choke 150ohm 125ma that I would like to use instead of r5. Is there an easy way to drop the b+ back where it needs to be?
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Old 4th April 2011, 06:45 PM   #34
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Quote:
Originally Posted by apurcell22 View Post
I have 1n4007's. Or should I just order and wait?
1N4007 will work fine. It might induce some noise... if you hear a buzz, replace them with SiC rectifiers.

Quote:
Originally Posted by apurcell22 View Post
I also have an 8h choke 150ohm 125ma that I would like to use instead of r5. Is there an easy way to drop the b+ back where it needs to be?
You might not need to do anything - if it's 150 ohms you will be pretty close. Try it!

Pete
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Old 4th April 2011, 06:57 PM   #35
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Thanks. How shall I orient the diodes? Stupid question I think I know the answer to, just want to verify.
Tia
Al
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Old 4th April 2011, 07:04 PM   #36
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Might the choke also help stifle some of the noise he could get from the slow 1N4007 diodes?
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Old 4th April 2011, 08:34 PM   #37
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The choke that I am using is the cheap Rcd-100 from Radiodaze. Custom When I purchased them, they were $8.95. Now they are a whopping $10.95. I think they are a pretty good value.
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Old 4th April 2011, 08:39 PM   #38
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Quote:
Originally Posted by apurcell22 View Post
Thanks. How shall I orient the diodes? Stupid question I think I know the answer to, just want to verify.
Tia
Al
Not such a stupid question! The left terminal of the TO-220 diode as you look at it from the front is the cathode. There's also a tiny dot on the PCB silkscreen next to the cathode lead.
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Old 4th April 2011, 08:42 PM   #39
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Quote:
Originally Posted by Ty_Bower View Post
Might the choke also help stifle some of the noise he could get from the slow 1N4007 diodes?
It might, though sometimes diode recovery noise gets around by capacitive or magnetic coupling... if that happens the only way to get rid of it is to spread things out, or remove it at the source. Quite often it couples across the power transformer to the filament winding, then capacitively to the cathodes...
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Old 4th April 2011, 08:42 PM   #40
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So dot= -, right
Thanks
Al
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