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Post by Deleted on Jul 11, 2014 14:13:52 GMT
Why is it on forum when people ask about the best volume controls do they totally ignore me when i mention using Linear pots fitted with LFR instead of the run of the mill Loggies?
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Post by pre65 on Jul 11, 2014 14:22:23 GMT
Why is it on forum when people ask about the best volume controls do they totally ignore me when i mention using Linear pots fitted with LFR instead of the run of the mill Loggies? Don't know.
I have no experience of linear pots with law faking resistors.
One thing worth trying (and it's cheap) is shunting a volume control pot.
www.world-designs.co.uk/forum/showthread.php?t=5795
I have tried Tocos log pots and they seem better than Alps. I am currently interested in LDR (light dependent resistor) volume controls.
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Post by MartinT on Jul 11, 2014 14:30:52 GMT
The good thing about linear pots is that their channel alignment is so much better, so LFRs are a good thing.
You can't beat one built from a switch and resistors, though.
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Post by pre65 on Jul 11, 2014 14:38:17 GMT
You can't beat one built from a switch and resistors, though. Not sure I agree with that, having tried several different types.
I'm hoping to try an LDR volume control in the near future as I've heard some very good feedback from those who have borrowed a test device.
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Post by danielquinn on Jul 11, 2014 14:40:51 GMT
Pre . were do you live , due to irresponsible cadmium users , I have banned my children from stoke , Wrexham and Macclesfield
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Post by pre65 on Jul 11, 2014 14:49:54 GMT
Pre . were do you live , due to irresponsible cadmium users , I have banned my children from stoke , Wrexham and Macclesfield I'm North Essex / Suffolk borders, nearest town is Clare. Postcode is CO10 8JN
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Post by danielquinn on Jul 11, 2014 14:52:02 GMT
Ta for that . I add it to my list
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Post by Stratmangler on Jul 11, 2014 16:04:28 GMT
Ta for that . I add it to my list You'd better add Rossendale to the list too - I have a wah pedal that uses LDRs Are you going to lock your children away?
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Post by pre65 on Jul 11, 2014 16:30:39 GMT
If it's cadmium you are worried about what about the millions of ni-cad batteries in circulation ?
I assume they have some cadmium in them ?
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Post by Dr Bunsen Honeydew on Jul 11, 2014 16:36:49 GMT
If an audio product contains an LDR it automatically fails CE and ROHS and WEEE regulations, so is illegal to sell in the EU.
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Post by pre65 on Jul 11, 2014 16:39:58 GMT
If an audio product contains an LDR it automatically fails CE and ROHS and WEEE regulations, so is illegal to sell in the EU. But, as far as I know, it is not illegal for me as a private consumer, to buy an LDR.
So, if the kit is sold sans LDR I can legally buy the LDR myself to complete the item.
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Post by danielquinn on Jul 11, 2014 17:13:13 GMT
Ta for that . I add it to my list You'd better add Rossendale to the list too - I have a wah pedal that uses LDRs Are you going to lock your children away? If I could I would. On a serious note. You will see on h's the tale of an 8 year old boy who found poorly discarded mercury and now is confined to a wheelchair. My flippant point was we have a responsibility to others not just the endless satisfaction of our own desires.
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Post by Dr Bunsen Honeydew on Jul 11, 2014 17:45:34 GMT
That is bending the law to suit you. What happens when you get bored with it or want to change it. If you sell it on then you are legally responsible because you have become the manufacturer. How are going to deal with WEEE regulation (end of life) as being the manufacturer you will be responsible for safe disposal no matter how many times it has been sold on. Basically you create something that can come back to haunt you and if a future user of your product becomes harmed in any way you are liable to be sued and lose your house.
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Post by Deleted on Jul 11, 2014 20:01:40 GMT
So then Mr Honeydew whats you take on LFR pots?
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Post by yomanze on Jul 11, 2014 20:05:18 GMT
Andr'e my NVA AP10H has a Cermet linear pot with an LFR, so favoured over log pots for sure.
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Post by Dr Bunsen Honeydew on Jul 11, 2014 20:52:03 GMT
I used a linear Sfernice Cermet blagged with a 10k across them, far better than the available film log pots at that time in the 90's. In 2006 I found a film pot that outperformed it so I use that now. BUT for real quality it is stepped attenuator for me.
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Post by pre65 on Jul 11, 2014 20:54:57 GMT
That is bending the law to suit you. What happens when you get bored with it or want to change it. If you sell it on then you are legally responsible because you have become the manufacturer. How are going to deal with WEEE regulation (end of life) as being the manufacturer you will be responsible for safe disposal no matter how many times it has been sold on. Basically you create something that can come back to haunt you and if a future user of your product becomes harmed in any way you are liable to be sued and lose your house. If an LDR volume control proved to be as good as the reports I've heard there would be no need to sell it on. I would take responsibility for my "manufactured" goods.
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Post by ChrisB on Jul 11, 2014 20:56:30 GMT
I've put Sfernice pots in two different boxes in the past and was really disappointed in how quickly they got noisy.
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Post by Dr Bunsen Honeydew on Jul 11, 2014 21:08:11 GMT
That is bending the law to suit you. What happens when you get bored with it or want to change it. If you sell it on then you are legally responsible because you have become the manufacturer. How are going to deal with WEEE regulation (end of life) as being the manufacturer you will be responsible for safe disposal no matter how many times it has been sold on. Basically you create something that can come back to haunt you and if a future user of your product becomes harmed in any way you are liable to be sued and lose your house. If an LDR volume control proved to be as good as the reports I've heard there would be no need to sell it on. I would take responsibility for my "manufactured" goods. So have you signed up to WEEE have you, do you even understand the rules and your responsibility. What are you going to do to dispose of hazardous substances at the end of their life?
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Post by Dr Bunsen Honeydew on Jul 11, 2014 21:10:13 GMT
I used a linear Sfernice Cermet blagged with a 10k across them, far better than the available film log pots at that time in the 90's. In 2006 I found a film pot that outperformed it so I use that now. BUT for real quality it is stepped attenuator for me. They are naturally noisy, it is not wear. Cermet track is rougher than film track, there is always a wiper noise in using cermet pots.
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