Thanks for the clarification. Been reading so many Caiman threads I am losing track as to which ones are what. Now I just need to find the Wima PN mentioned for the capacitor in this thread.......Quote:
Originally Posted by Carson
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Thanks for the clarification. Been reading so many Caiman threads I am losing track as to which ones are what. Now I just need to find the Wima PN mentioned for the capacitor in this thread.......Quote:
Originally Posted by Carson
And i've found a discrete opamp that has to work in the Caiman due to the very generous supply voltage of 5-15v dc.. The Dexa-73728, available at Parts Connexion. Maybe this is a good alternative to the Burson equivalents..?!
Would something like this work as a dedicated 15vdc linear power supply or can I make/find something better state side?
http://www.skycraftsurplus.com/dual-...15vdc1amp.aspx
http://www.solahd.com/products/power...silverline.htm
If funds allow, get THIS ONE. Set it to 15.6V~15.8V on the LCD display and double check the output voltage with a multimeter.
The noise figures are even better than a similar linear PSU that I use in the workshop.
It will work, but i think you won't notice any difference compared to the Caiman power supply.Quote:
Originally Posted by fmzip
If you want to try something that maybe is better than the standard supply, you may want to look at the following to make a powersupply (in correct order)
-A FUSE, properly rated
-a simple EMI-RFI filter (optional, while you're at it: add a zener diode to protect the circuit for powerspikes)
-a toroidal powersupply
-bridge rectifier
-buffer elco(s) (i don't believe in audio-class caps for powersupply buffers, but suit yourself)
-to stabilize the output voltage (and if you want to go hi-end): a 15 volt Murata or NewClassD regulator) (i think this step is pretty useless, as in the caiman has it's own regs for 12 and 5 volts..)
Notes:
-Do not supersize anything (especially the trafo and buffer elco's), it will have no effect other than a weight gain of your PS, a 10% oversize is enough for both)
-Please, please seek some help if you haven't done this before. You are working with potentially dangerous voltages, especially if you try to touch a loaded elco or take a live wire as ground etc..)
-I want to help you with the calculations once you've decided to build one yoursef
-ground properly
-add some additional components to make the PSU more sophisticated, like a switch, elco resistor etc..
Thanks for the tips guys.
As I do not have the Caiman, I do not have the stock power supply. What I am doing is modding my TC-7520 unit with the Murata Power regs, caps, dac etc. Just had the Wolfson soldered in a few minutes ago! :) Once I get the regs, I will need a power supply...
I certainly don't mind building a power supply. All I would need is a list of parts and a simple schematic. I have a PCB assembly shop at my disposal to help with the assembly, testing etc. Can you help me with creating a parts list?
What I was really trying to do is weigh the costs of ordering/ delivering a Caiman PS to the states and seeing what I could do for the same amount of dollars versus time and effort....
Saw this one for around $45:
http://cgi.ebay.com/SOLA-REGULATED-P...item230354f3d1
Maybe I will take Stan's advice and order the other. Would be nice to have a variable PS at my disposal for little projects as well :)
This 5 AMP one would work as well, correct?
http://cgi.ebay.com/Mastech-Variable...item588839ccd8
Stan, looks like the Mastech Power supplies you pointed out come in a 2 and 3 AMP model
http://www.kitsusa.net/phpstore/html...2AMP-1232.html
Shouldn't 2 Amps is sufficient?
Or this one?
http://cgi.ebay.com/MASTECH-HY1803D-...item2eac3d0af9
The 2 amps version is fine.
I thought I should say a big thank you to Jimmy Dripps at Tirna Electronics for his great work on my 7520 fitting the Elna caps. Combined with a TeddyReg power supply it sounds superb.
Jimmy did the resistor mod and shortcut mod F.O.C-what a gent!
How much is this power supply you are referring to and where did you get it?