FCUPS versions, other info

DIY HiFi Forum

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Hey all,

I'm an original diyhifisupply fan since getting an ella kit in 2002! I love the transformation of products over the years into some amazing and well designed stuff. (OT, but my one hesitation is that the current price structure may prevent people starting out, like I was in 2002, from entering this amazing world of tube diy)

I have a first version (stamped 2008) FCUPS module that I am planning to use in a power amp project soon. I have 2 versions of the manual, 1b and the one on the site currently, v2.1. I was just curious what changes were made between the 2 board versions. Were there any problems/issues that were fixed on the second one that I should be aware of? I noticed that the first manual says the max. current w/o external caps is 130mA, and the v2.1 manual says the max is 100mA. Another post here mentions a mosfet being repeatedly damaged, but the cause of this was not made clear. Is there any protection feature from over current/voltage?

I'm also curious about expected output voltages from this unit when using the onboard SS rectification. The manual states that the circuit tracks the "lowest point" in the rectified voltage. Perhaps I should do some reading on these gyrator circuits and it will become clear. Does it behave somewhere between a cap. input and a choke input conventional supply? In the examples section, one circuit has a input of 300VAC and obtains a 365V B+ while another has a 250VAC input and obtains 260V B+. I understand this is related to current draw, but I am unclear what, if any, other parameters I can adjust to compensate.

Just some thoughts before I dive in, there is very little information on people diy'ing with this psu. I will report back here soon with my results for anyone else that may be interested.

cheers

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Topic - FCUPS versions, other info - zarniwoop 13:22:23 07/14/13 (5)

RE: FCUPS versions, other info - Thorsten 14:03:20 07/15/13 (4)

RE: FCUPS versions, other info - zarniwoop 19:10:19 07/15/13 (3)

RE: FCUPS versions, other info - Thorsten 23:26:00 07/15/13 (2)

RE: FCUPS versions, other info - zarniwoop 19:37:43 07/17/13 (1)

RE: FCUPS versions, other info - Thorsten 20:26:38 07/17/13 (0)

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