I'm trying some 600: 600 ohm DIY transformers on the DDDAC output, so I'm wondering if I can try a 10k: 10k transformer? Has anyone tried it? DDDAC is with 4 boards.
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600 Ohm is fine, has less windings as 10k normally and hence a larger bandwidth. Make sure to terminate the output with 600 Ohm - 1k5....
Same here. Also small ticks when selecting new songs. I use stationpi, raspi, fifopi q2 and i2s directly to tda1541a and volumio. Probably morning to do with fifopi but don't know what else...
Thank you for your feedback. Seems that I'm not the only one with this issue!?
I did a check without fifo pi q3. Means RPI I2S -> DDDAC
no clicks and pops anymore!!!!
I then installed the fifo pi again and I also exchanged the accusilicon clocks against the default clocks, but this didn't help either. Clicks and pops again... 🙁
So this tells me, that the fifo pi is the cause of the issue!?? Maybe it is broken? Or maybe this is 'normal'. Crazy that there are some people with the same issue and others are not having any clicks / pops 😕
I did a check without fifo pi q3. Means RPI I2S -> DDDAC
no clicks and pops anymore!!!!
I then installed the fifo pi again and I also exchanged the accusilicon clocks against the default clocks, but this didn't help either. Clicks and pops again... 🙁
So this tells me, that the fifo pi is the cause of the issue!?? Maybe it is broken? Or maybe this is 'normal'. Crazy that there are some people with the same issue and others are not having any clicks / pops 😕
.I did a check without fifo pi q3. Means RPI I2S -> DDDAC
no clicks and pops anymore!!!!.........
I suggest to bring this to the Ian Canada FiFoPi topic now
no clicks and pops anymore!!!!.........
I suggest to bring this to the Ian Canada FiFoPi topic now
Sure you can try. Just make sure to keep the DC voltage across the primaries at zero to avoid saturating the core (some transformers are more tolerant to this than others).
With one Deck, you will have a low frequency -3dB point of 28 Hz
2 decks 14 Hz and 4 decks 7 Hz.
Connect the primary between POS and NEG and leave the Common pin not connected ....
Looking at the specs, they are close to the special DDDAC Sowter transformer.
This could work very well, as they are large, they will be able to handle high output voltages at low frequency which will give a solid sound....
Let us know how it went, ok ?
Thanks Doede, I have 4 decks, bass will be there. I'll connect them tomorrow. I'm just wondering how it will sound.
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They look like the output transformers of some small tube amplifier. Inside, as far as I know, is a torus core with coils and everything is poured into some resin.
They were used for telephony. They can be bought in Serbia for 30-40eur / pair. I hope for a good result, if nothing, I didn't buy them, I just borrowed them.
They were used for telephony. They can be bought in Serbia for 30-40eur / pair. I hope for a good result, if nothing, I didn't buy them, I just borrowed them.
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I have been reading Doede and mbernnwas posts on power supplys and have some questions on how to put i all together.
1. Are my leads from the 15v side ok? i measure 32v at the two outer holes of the blue board the trafo is a 2x15v 120vac 4A.
2. should i install 15mH 0.36ohm trafo and a 0.5ohm resistor in series? or leave the original 0.1ohm in?
3. what size of the fuse to use 250v ?A?
The blue capacitor is 22000uf the rest of the blue board are the original parts.
1. Are my leads from the 15v side ok? i measure 32v at the two outer holes of the blue board the trafo is a 2x15v 120vac 4A.
2. should i install 15mH 0.36ohm trafo and a 0.5ohm resistor in series? or leave the original 0.1ohm in?
3. what size of the fuse to use 250v ?A?
The blue capacitor is 22000uf the rest of the blue board are the original parts.
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Toroidal transformers are most sensitive to saturation if there is some DC across the primaries. I'd suggest you tweak your DC imbalance to super-duper low levels by adjusting the load resistors accordingly.