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Post by Deleted on Aug 3, 2012 13:14:26 GMT
Hi guys, Please bear with me as I know zilch about electrics and I draw less flack when I pose numptie questions on here than I do on other fora, so here goes . I always assumed that 'ripple' was a residue of the AC sine wave that persisted through into the DC domain after conversion but I now think that that may not be strictly true. I have just changed the power supply to my Mini-Ts from linear PSU through JLH REs to LiPo batterries direct and I think it does help the SQ. I wondered therefore if feeding the LiPo batteries through the JLH REs would improve anything further. Sorry if this really is a numptie question but I know nowt of such things. TIA, Dave.
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Post by gommer on Aug 3, 2012 14:57:51 GMT
It might still improve things, by how much, other members can surely tell you.
Ripple is basically any ACc component superimposed on a DC signal. The cause for ripple can be many things: A rectifier will have some voltage ripple left after rectifying. Same thing for a SMPS. But also if powered by a battery, depending on how big the internal series resistance of the battery is, voltage ripple might be there. This is caused by the amplifier not drawing a perfect DC current, but it will also draw current with some current ripple. This current ripple will induce voltage ripple in the battery, depending on it's internal resistance.
Hope this helps a bit?
Cheers, Marc
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Post by Deleted on Aug 3, 2012 20:32:13 GMT
Dave If you are using similar batteries to those John Kenny has spoken about a while back ih RG, provided that the leads are short and heavy duty, and any connectors used have very low resistance, then there is unlikely to be any real advantage in following with a JLH. Alex
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Post by Deleted on Aug 3, 2012 21:15:32 GMT
hanks Alex, I appreciate your input but it don't really help numptie me much . The LiPo batteries are bog standard eBay ones ex HK/China, the leads and connectors are short but 'as supplied', so I doubt they will be particularly heavy duty or very low resistance. I guess the answer is the usual one:- try it and find out . Thanks anyway - if I do it I'll let you know. Cheers, Dave.
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Post by Deleted on Aug 4, 2012 1:22:59 GMT
hanks Alex, I appreciate your input but it don't really help numptie me much . The LiPo batteries are bog standard eBay ones ex HK/China, the leads and connectors are short but 'as supplied', so I doubt they will be particularly heavy duty or very low resistance. I guess the answer is the usual one:- try it and find out . Thanks anyway - if I do it I'll let you know. Cheers, Dave. Dave Depending on the instantaneous current capabilities of the batteries, it could be advisable to limit the current at switch-on into a JLH, as in the thread for the PC's internal JLH. In other words, it's probably not worth going there. Kind Regards Alex
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