Patrick,
Version 0, the prototype, proves to be absolutely stable and produces a excitingly beautiful sound.
ZSAUDIO and I myself built it.
Version 1, the version that I will offer in the forthcoming group-buy, will include the well-known DX PSU and be as versatile as I could manage.
I will send you an EMail.
Best regards - Rudi
Version 0, the prototype, proves to be absolutely stable and produces a excitingly beautiful sound.
ZSAUDIO and I myself built it.
Version 1, the version that I will offer in the forthcoming group-buy, will include the well-known DX PSU and be as versatile as I could manage.
I will send you an EMail.
Best regards - Rudi
I did not do any special trick. Just turn the Ibias pot down to zero R before you turn the amp on. Rudi had some issues with his NJL's TC diodes you can read about it some pages back.
It's safe to insert some curren limiter (big wattage resistors or light bulb) in serial with the backend's PSU but be careful to feed enough current to set up the amp properly.
You can test your amp for thermal stability and if you have problem with it just increase your Re 0,15-0,22R.
zsaudio
It's safe to insert some curren limiter (big wattage resistors or light bulb) in serial with the backend's PSU but be careful to feed enough current to set up the amp properly.
You can test your amp for thermal stability and if you have problem with it just increase your Re 0,15-0,22R.
zsaudio
Rudi: I ordered locally in Romania at a very small company ... but I don't know if they deliver abroad ...
I highly recommend you to use R-cores wherever you can ( or afford ) because they have almost zero electro magnetic interference with surrounding components.
A very good source of R-cores transformers is Transformateur R-CORE : Achat Transformateurs R CORE discount
I highly recommend you to use R-cores wherever you can ( or afford
) because they have almost zero electro magnetic interference with surrounding components.A very good source of R-cores transformers is Transformateur R-CORE : Achat Transformateurs R CORE discount
What about r-core transformers what is getting more and more popular in the audio field.
If you google "r-core transformer" you get a lots of ebay sales. And there's Seletronic in France who offers a wind range.
Just curious what's your feelings about it guys.
zsaudio
R-cores transformers don't become "more and more popular in the audio field", they were designed with the audio target in mind
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R-cores transformers don't become "more and more popular in the audio field", they were designed with the audio target in mind
Yes that can be true but even nowdays i can not see them in commercial products not so often. I know several ones use it.
When i swaped for r-core transformator me and my friends we heard the difference. Some people would say this is subjective and i'd get a BS flag.
Anyway i'd like to hear your experiences guys.
Yes that can be true but even nowdays i can not see them in commercial products not so often. I know several ones use it.
When i swaped for r-core transformator me and my friends we heard the difference. Some people would say this is subjective and i'd get a BS flag.
Anyway i'd like to hear your experiences guys.
In my experience, given a resolute audio system, R-core transformer (vs other types) makes a very big difference in noise floor level and could bring up microdetails, things that are measurable and not BS
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Hi Patrick,
where did you get that beauty?
I did buy them from VT67 and he bought them I think from a german company. bought them for 45 Euro each.
Can I use them in the FC100?
In my experience, given a resolute audio system, R-core transformer (vs other types) makes a very big difference in noise floor level and could bring up microdetails, things that are measurable and not BS
I'm happy that i'm not alone with my findings.
I think you can use that but tune the frontend voltage to your rised backend voltage according to Mihai's recommendations on the PSU.( see the orig rmi-fc100 thread)
The auxiliaries schematics were posted in the GB thread.
http://www.diyaudio.com/forums/group-buys/209075-roenders-fc-100-rev-1-group-buy-2.html#post2971055
There are two pairs of terminals X3 & X4) in the 240Vac line to/from the primary winding of the 12Vac transformer.
It seems obvious that one pair are taken to a remote ON/OFF switch.
What is the other pair for? Switching of the Neutral Line?
Or, could this pair be used for an over-temperature heatsink switch?
What else?
http://www.diyaudio.com/forums/group-buys/209075-roenders-fc-100-rev-1-group-buy-2.html#post2971055
There are two pairs of terminals X3 & X4) in the 240Vac line to/from the primary winding of the 12Vac transformer.
It seems obvious that one pair are taken to a remote ON/OFF switch.
What is the other pair for? Switching of the Neutral Line?
Or, could this pair be used for an over-temperature heatsink switch?
What else?
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