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Post by Priapulus on Aug 8, 2022 21:32:31 GMT -5
I really like the way Emo amplifiers can be connected to turn on automatically when you powerup your preamp/processer. My vintage power amplifier lacked that feature, so I made one. I simply put a solid-state relay in an electrical box and spliced it into the power cord. I also added a LED for feedback. I could have installed the relay inside the amplifier, but I was reluctant to alter it. Sincerely /b     |
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Post by 405x5 on Aug 9, 2022 8:26:06 GMT -5
I really like the way Emo amplifiers can be connected to turn on automatically when you powerup your preamp/processer. My vintage power amplifier lacked that feature, so I made one. I simply put a solid-state relay in an electrical box and spliced it into the power cord. I also added a LED for feedback. I could have installed the relay inside the amplifier, but I was reluctant to alter it. Sincerely /b View AttachmentView AttachmentView AttachmentView AttachmentYes! a PERFECT and elegant solution to accomplish “the mission”. However, watch out for the power cord audiophiliac crowd that will poo poo you all the way for this! |
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Post by leonski on Aug 15, 2022 18:42:36 GMT -5
Yes, power cords are one of the '3rd rail issues' in audio today.
But all I want? The schematic for the device. And maybe a part number for the TD Relay.....
I'd be tempted to ADD some MOV protection.......
Cheers and good job....
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KeithL
Administrator 
Posts: 10,273
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Post by KeithL on Aug 16, 2022 9:03:19 GMT -5
In most cases that third rail is mostly imaginary. Yes... an inadequate power cord can limit the performance of a power amplifier. And, yes, if that happens, being able to choose a different power cord will solve the problem. But, if the power cord is adequate to begin with, then there is nothing to be gained by "upgrading" it. And, yes, the permanently attached power cables on some early gear were not nearly heavy enough... (But that's just plain poor design or a bad manufacturing choice.) Now... if you do want a really nice heavy power cord... for something that needs one... (Really fat; really soft and squishy; really flexible; and really blue.)  emotiva.com/collections/accessories/products/xiec-power-cableYes, power cords are one of the '3rd rail issues' in audio today. But all I want? The schematic for the device. And maybe a part number for the TD Relay..... I'd be tempted to ADD some MOV protection....... Cheers and good job.... |
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Post by 405x5 on Aug 16, 2022 9:33:08 GMT -5
In most cases that third rail is mostly imaginary. Yes... an inadequate power cord can limit the performance of a power amplifier. And, yes, if that happens, being able to choose a different power cord will solve the problem. But, if the power cord is adequate to begin with, then there is nothing to be gained by "upgrading" it. And, yes, the permanently attached power cables on some early gear were not nearly heavy enough... (But that's just plain poor design or a bad manufacturing choice.) Now... if you do want a really nice heavy power cord... for something that needs one... (Really fat; really soft and squishy; really flexible; and really blue.) View Attachmentemotiva.com/collections/accessories/products/xiec-power-cableYes, power cords are one of the '3rd rail issues' in audio today. But all I want? The schematic for the device. And maybe a part number for the TD Relay..... I'd be tempted to ADD some MOV protection....... Cheers and good job.... ……And much of that early gear was deficient in such a way that NO power cord would have changed what came out at the end…..(those days prior to the super amps. making their appearance.) |
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Post by leonski on Aug 16, 2022 14:14:13 GMT -5
In most cases that third rail is mostly imaginary. Yes... an inadequate power cord can limit the performance of a power amplifier. And, yes, if that happens, being able to choose a different power cord will solve the problem. But, if the power cord is adequate to begin with, then there is nothing to be gained by "upgrading" it. And, yes, the permanently attached power cables on some early gear were not nearly heavy enough... (But that's just plain poor design or a bad manufacturing choice.) Now... if you do want a really nice heavy power cord... for something that needs one... (Really fat; really soft and squishy; really flexible; and really blue.) View Attachmentemotiva.com/collections/accessories/products/xiec-power-cable……And much of that early gear was deficient in such a way that NO power cord would have changed what came out at the end…..(those days prior to the super amps. making their appearance.) Imaginary to YOU or not.....If someone thinks it's real? You must deal with that. All my power cords are what came with the gear with one exception. My 1970s Kenwood KA-7100 came with an 18ga 'trapped' cord. when I looked it over, I replaced with 16. Not a big deal, but the old cord.....was getting a little long in the tooth and I'd expect insulation to be cracking at some point. Some very powerful amps come with what is IMO, an inadequate cord. Anything over maybe 500 watts total? May need a 12ga, or maybe one gauge heavier than it comes with. Many DIY options will not break the bank or have your hifi buddies thinking your a dummy.... I have no idea what 405 means when he says 'super amp'? Is that just really powerful? or capable or driving any load? Original Krell, I think it was a KSA50 was not that powerful but was unconditionally stable. A super amp? |
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Post by vcautokid on Aug 18, 2022 14:24:09 GMT -5
What Keith says yes. And you don't need to go Hay Wire on an AC power cable money wise. If you do, that is a YOU thing, and nothing else.
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Post by leonski on Aug 18, 2022 16:12:35 GMT -5
What Keith says yes. And you don't need to go Hay Wire on an AC power cable money wise. If you do, that is a YOU thing, and nothing else. Improvements in 'fundamentals' like current capacity and shielding can be had for very little $$$ Especially for those amps which are under corded to begin with. Agreed. Generally no need to spend obscene (or is that just vulgar?) amounts of $$$ on a new power cord..... DIY may not save a Lot Of $$, but you'll get good value in exactly what you want. |
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Post by vcautokid on Aug 18, 2022 16:58:04 GMT -5
What Keith says yes. And you don't need to go Hay Wire on an AC power cable money wise. If you do, that is a YOU thing, and nothing else. Improvements in 'fundamentals' like current capacity and shielding can be had for very little $$$ Especially for those amps which are under corded to begin with. Agreed. Generally no need to spend obscene (or is that just vulgar?) amounts of $$$ on a new power cord..... DIY may not save a Lot Of $$, but you'll get good value in exactly what you want. And bragging rights it's yours, and you made it. So there is a personal connection......geez...you know when you make it yourself. Yeah they can keep those $10,000.00 Power cables. High End is out of control, and abusing what someone will spend, but hey I have no stake in their money, so, it is all good. Like the power cable I just bought for $32.00 that noses up against the nutty high priced power ropes. And no I will not use toilet paper rolls to suspend my power cable either. I may build my own power cable at some point. Sounds like fun. |
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