Can anyone supply me with a some photos of a schematic for wiring up the power supply board and transformer to the F6? I have opted to use a board from ClassDAudio, http://www.classdaudio.com/large-hd-power-supply-1.html , populated with 22,000 microfarad capacitors for my project and the Antek AS-4218 transformer, but I can probably figure it out from the DIY Universal Board if necessary. It seems that the photos in the build guides and the links to pdfs are not working. I assume this is a temporary problem due to the software changover.
sndlvr:
I am by no means an expert, but you might want to reconsider. The store's power supply board is excellent and the parts needed to populate it are readily available. Although supply chain delays are rampant, Mouser (for example) has plenty of snap-in caps you might consider (e.g., https://www.mouser.com/ProductDetail/Cornell-Dubilier-CDE/SLP223M035H9P3?qs=5mhQgkvyHZBcv34hdggVAg==). Eight 22k uF caps would work nicely in an F6 (and provide 44k uF more power supply capacitance than the supply you mentioned). It would also cost less than the supply you noted.
Just a thought.
Regards,
Scott
I am by no means an expert, but you might want to reconsider. The store's power supply board is excellent and the parts needed to populate it are readily available. Although supply chain delays are rampant, Mouser (for example) has plenty of snap-in caps you might consider (e.g., https://www.mouser.com/ProductDetail/Cornell-Dubilier-CDE/SLP223M035H9P3?qs=5mhQgkvyHZBcv34hdggVAg==). Eight 22k uF caps would work nicely in an F6 (and provide 44k uF more power supply capacitance than the supply you mentioned). It would also cost less than the supply you noted.
Just a thought.
Regards,
Scott
Thanks Scott,
I got a partially populated power supply board Everything but the caps) from ClassDaudio for $35 and then bought 6 22,000 uf caps from mouser. I had assurance from ClassDaudio this would work but am not above changing plans and going with the universal board if someone with experience says that is the way to go. At the moment I have been halted by the fact that the changover in software here at diyaudio seems to have broken links to the schematics and pitures that I need to go forward. I have never done and internal power supply before and so need info that will help me every step of the way. I have seen comments in the reviews of the universal power supply board that, despite the build guide, complete information is a bit scattered and fragmentary within the threads.
Bruce
Bruce:
In that case, proceed with the power supply board you already have. There is nothing wrong with it. If possible, try to orient the board in such a way that provides extra space for additional capacitors (assume they will be mounted by clamps to the bottom panel). 132,000 uF in power supply capacitance is more than Nelson's original design suggests, but I've found that Nelson's proposed power supplies tend to be a little anemic; in my limited experience (F5T V3 mono blocks, F5T V2 and F6 amps) increasing total power supply capacitance by about 50-60% more than the schematic indicates results in far better bottom end performance, no bloat and no adverse impact on the speed of the amp. Your mileage may vary, of course, but why not leave room for experimentation down the line?
Here are two photos of one of my V3 amps and two photos of my F6.
Good luck!
Regards,
Scott
In that case, proceed with the power supply board you already have. There is nothing wrong with it. If possible, try to orient the board in such a way that provides extra space for additional capacitors (assume they will be mounted by clamps to the bottom panel). 132,000 uF in power supply capacitance is more than Nelson's original design suggests, but I've found that Nelson's proposed power supplies tend to be a little anemic; in my limited experience (F5T V3 mono blocks, F5T V2 and F6 amps) increasing total power supply capacitance by about 50-60% more than the schematic indicates results in far better bottom end performance, no bloat and no adverse impact on the speed of the amp. Your mileage may vary, of course, but why not leave room for experimentation down the line?
Here are two photos of one of my V3 amps and two photos of my F6.
Good luck!
Regards,
Scott
Attachments
Class D Audio's website is very lacking on information for their power supply board. However from looking at the picture on their website, it does not look equivalent to the typical First Watt power supply. Furthermore power supply requirements for a Class D amplifier are less demanding than that of a Class A amplifier such as a First Watt F6.
Just looking at the picture the bridge rectifier is small, not heat sinked, and just looks undersized compared to what is typically used in First Watt amplifiers.
The power supply filtering appears to be capacitance only, whereas the typical First Watt supply has a Pi filter, with capacitance, resistance, capacitance. The Pi filter supply is much more effective in suppressing ripple.
I suggest you cut your losses and build a power supply using the diyAudio board. The capacitors that you already have can be used in the diyAudio board.
If you have questions you should post them in the F6 Illustrated Build Guide thread in the Pass Labs Forum. First Watt builders are plentiful there so you will get for quick and informative responses.
Just looking at the picture the bridge rectifier is small, not heat sinked, and just looks undersized compared to what is typically used in First Watt amplifiers.
The power supply filtering appears to be capacitance only, whereas the typical First Watt supply has a Pi filter, with capacitance, resistance, capacitance. The Pi filter supply is much more effective in suppressing ripple.
I suggest you cut your losses and build a power supply using the diyAudio board. The capacitors that you already have can be used in the diyAudio board.
If you have questions you should post them in the F6 Illustrated Build Guide thread in the Pass Labs Forum. First Watt builders are plentiful there so you will get for quick and informative responses.
The FW board will have less hum because of the RC decoupling included.
You can sell the other board on ebay, etc.
You can sell the other board on ebay, etc.
Scott,
Thanks for the response and the photos, may I get back to you when I get deeper into it?
Bruce
Ben,
Thanks for taking the time to explain your reasoning. I am going to follow your advice and have ordered the universal power supply board and parts.
Bruce