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
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
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.
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.
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
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
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
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 ?
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 ?
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 ....
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 ....
Hfe problems? not seen yet
The small signal transistors in the PSU are good as long as they have 'any' Hfe (20 and up will do ). I think you should also replace the associated power transistor (just to be sure).https://www.rush-on-line.co.uk/cap_index.php
I bought a bag of 33nf and 11nf, they needed padding out to get them perfect, 0.1%, but they came out of the bag within a % or so of each other.
Of course they are polystyrene caps so don't 'weld' them to the ground plane. Much easier to solder them like smt caps to the top of the pads in the RIAA section and not risk melting them.
I bought a bag of 33nf and 11nf, they needed padding out to get them perfect, 0.1%, but they came out of the bag within a % or so of each other.
Of course they are polystyrene caps so don't 'weld' them to the ground plane. Much easier to solder them like smt caps to the top of the pads in the RIAA section and not risk melting them.
Hope this will help
http://www.diyaudio.com/forums/atta...paradise-phono-stage-paradise-r3-stuffing.pdf
http://www.diyaudio.com/forums/atta...paradise-phono-stage-paradise-r3-stuffing.pdf
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Thank you! I Just quadruple checked the components. Stuffing looks fine. Annoying. Group buy came with D45H11 PNP tranies instead of TIP32C. Will obtain TIP32 transistors from reichelt and try again.