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Old 6th December 2012, 10:52 AM   #441
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Default RIAA Caps

Hi,

I am somewhat confused about the RIAA Caps. The manual states 1 x 33.3nf and 1 x 11nf. However, there is another thread about V-Caps, where 1 x 32nf is going to be used instead of the 33.3nf.
Thel offers KP Caps with 33nf.

My question now is: Shall I go for FKP2 with exactly 33.3nf or shall I go for the 33nf?

Many thanks, tom
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Old 6th December 2012, 10:56 AM   #442
pdul is offline pdul  Denmark
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You can combine the caps to get as close as possible, to 33,3nf
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Old 6th December 2012, 11:13 AM   #443
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33,3 / 11 nF are the official values. As Stefanoo knows better (as usual ), you might want to try his 32 nF option. There's even a third combination floating around somewhere (from RCruz, me thinks).

33,3 nF is best done with 10nF || 10nF || 10 nF || 3.3nF, 11nf is 10nF || 1nF.
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Old 6th December 2012, 11:24 AM   #444
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Ricardos version is totally flat whereas the numbers that MiiB and i came up with have a little lift of 0.5dB towards the deep bass, the so called house curve.
That curve makes sure that the Paradise never sounds too sharp. We found that use full because not all records are perfect. The difference it makes is rather small though.
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Old 6th December 2012, 11:42 AM   #445
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Gents,

thanks for your response. I feel very safe with your values. So I go with 33.3nf and 11nf.

I just talked to Oppermann regarding Styroflex MESK25 Caps with 0.5%. They have following values:

1) 27700 + 5690 = 33390
2) 10000 + 1000(only available in 2%) = 11000

Three questions:
1) The values are not exact. What would you recommend. a) go for exact values and use FKP2 b) go for these values
2) They are really big. Has someone tried them
3) If they are an option, does someone else like to have some?

thanks, tom
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Old 6th December 2012, 11:48 AM   #446
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Giving away the best part sources, you... .
Those caps are big, won't fit the board without problems.
Even if your values aren't perfect, I'd go for those nice KP babies.
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Old 6th December 2012, 11:59 AM   #447
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Quote:
Originally Posted by Holger Barske View Post
As Stefanoo knows better (as usual )
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Old 6th December 2012, 02:48 PM   #448
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Quote:
Originally Posted by Holger Barske View Post
33,3 / 11 nF are the official values. There's even a third combination floating around somewhere (from RCruz, me thinks).

33,3 nF is best done with 10nF || 10nF || 10 nF || 3.3nF, 11nf is 10nF || 1nF.
No big fuss about RIAA small difference, as long as it comon on both channels

Riccardo combination (which I trust ) may be a better one,and shows in which direction to compromise when sorting the caps out
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Old 6th December 2012, 03:31 PM   #449
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Hello .

I have matched the BCs and got a set BC327 nice around 400 hFE and one around 500 hFE.
From the BC 337 i´ve got a Set around 500 hFE .

What is to do ; using thr 500 wiht the risk of ozillation , or buy / swap some BC337 with lower hFE ( around 400 ) with someone here ?

What´s best ?
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Old 6th December 2012, 05:22 PM   #450
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It is all depending on your skill set, how much work you are villing to put on it and the lab set up you got.

400 Hfe is best safe options at least for current mirrors but input benefit from hi Hfe as far as I understand

I will need to vear same artic gear to work in my loft (around 7 C at the momement) and get same set matched up so if you got time I am willing to help but maybe finding some body near you may be best option

Did I say this before?

PS some how with poorly matched set at around 540 I got no oscillation on R2 so ....
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