Since it's an addition to a power supply filter for a few bucks and works with any supply of interest in this arena, I assume it will be attractive.
Works with preamp too...
Works with preamp too...
I put this together as part of a revised power supply filter for the diy Sony Vfet and similar amps
to go in the diyAudio store and I have a nice pile of them ready to ship.
...
Thank you. I was concerned that I had managed to screw something up. I'll look to include something like this in mine and will keep an eye out for further postings on the subject.
My crossover is misbehaving...
After a few months of flawless operation, it has started producing moderate level white noise on one output. This isn't affected by the pot, or preamp level - same noise regardless. I have checked all connections, solder joints, searched for bits of debris that might be causing this - nothing that I can see. I'm now wondering if a component (transistor?) might have failed?
Is there a way of testing components on the board to identify possible culprits?
As always, any help gratefully received.
After a few months of flawless operation, it has started producing moderate level white noise on one output. This isn't affected by the pot, or preamp level - same noise regardless. I have checked all connections, solder joints, searched for bits of debris that might be causing this - nothing that I can see. I'm now wondering if a component (transistor?) might have failed?
Is there a way of testing components on the board to identify possible culprits?
As always, any help gratefully received.
Right channel only, high frequency only; so just one of the four sections. I guess that exonerates the PSU (24v Triad wall wart)?
Need jfets? I can send you some with the correct resistor measured by NP (or by his minions). You pay shipping only.
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Trying to get all the parts needed to build a few of the XO's
1000uf caps are no longer in stock at digikey.
Can you suggest a replacement ?Also, is there an improvement from using the vishay 10 position pots ( which i cannot find, but i did find 23 position pots ) or any other advantage ?
And the same question for caps, any difference, even a small one ,in using something like claritycaps instead of Wima ?
Hello RolandPSP,
I have built my 6-24-crossovers with bourns 25-turn-pots. I think they gave me easier adjustment of the crosssover points / - frequencies. No reason to use them soundwise.
For sure you can experiment with different caps. I made one version with WIMA-caps in the filters
and Nichicon UES bipolars as decoupling caps (before and after the buffer cells - or input and output).
As described in Nelson Pass article and bom. Sounds very nice.
Then I used Mundorf-caps and a few other brands. The differences were in my opinion that marginal...
I do not want to say that you shouldn't try it. Buy good caps. But caps which cost more than the 6-24-kit
and all devices together - makes no sense to me.
I wrote it many times - I hope the rest of your system is as good as this active crossover with the WIMAs
and some nice decoupling caps.
I changed the volume -pots at the input to 10-turn-pots for very accurate volume-adjustments between
high- and low-pass section.
But this is my opinion. 😉
Cheers
Dirk
I have built my 6-24-crossovers with bourns 25-turn-pots. I think they gave me easier adjustment of the crosssover points / - frequencies. No reason to use them soundwise.
For sure you can experiment with different caps. I made one version with WIMA-caps in the filters
and Nichicon UES bipolars as decoupling caps (before and after the buffer cells - or input and output).
As described in Nelson Pass article and bom. Sounds very nice.
Then I used Mundorf-caps and a few other brands. The differences were in my opinion that marginal...
I do not want to say that you shouldn't try it. Buy good caps. But caps which cost more than the 6-24-kit
and all devices together - makes no sense to me.
I wrote it many times - I hope the rest of your system is as good as this active crossover with the WIMAs
and some nice decoupling caps.
I changed the volume -pots at the input to 10-turn-pots for very accurate volume-adjustments between
high- and low-pass section.
But this is my opinion. 😉
Cheers
Dirk
And if you mean the 1000µF-caps in the PSU-filter - you can use higher µF-values.
Only look that they have a high enough Voltage-rating (I used 35 V- types).
You know it is running on +24 V DC.
Greets
Dirk
Only look that they have a high enough Voltage-rating (I used 35 V- types).
You know it is running on +24 V DC.
Greets
Dirk
