Leaded solder just works better, period.
Now, do we have an environmental responsibility to not put more lead into landfills? You could argue that. Or, since it's DIY, does it really matter if you make one or two PCBAs with leaded solder?
I'm not sure, but I do know that leaded is better, especially if reflowing with an oven that isn't super expensive.
We currently have a device at my office that has approximately 500 lbs of lead in it and is RoHS exempt. Apparently gamma emitters scare the EU more than lead (no argument there).
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Thanks for that. I rechecked and I am actually using 0.4mm - but the 0.23 would be much easier for IC’s.
Rubbish
Also rubbish unless you specifically mean jukebox cartridges
If €2.99 to actually learn something is too much then I am sorry for you.
My thinnest solder is .015". I do use about 250 grams a year of it. Total solder consumption is three or four spools (one pounders) each year and a few bars for the solder pot.
I have had my blood tested for lead and always clean.
I do have some 402 diodes, but quite simply as everything will fit with 1206, easy is fine for me.
Running a solder bead to do the too many leg ICs has always worked for me. I do have a few parts which have bumps on the bottom and are not really meant to soldering irons. Although I do have plenty of hot air and even hot air tools, I still prefer an iron.
I do use vias to make some parts easier to solder.
When I got in some 201 parts, the price being below return postage, they became a contribution to future archeologists.
Currently laying out version two of the PCB sets. Learned a bit about cramming things into a smaller case. Space available including shielded enclosure is 2.75" x 1.5" depth 1.375". This includes the pair of transformers needed to increase idiot resistance. The other big part are the three wire terminals.
I have had my blood tested for lead and always clean.
I do have some 402 diodes, but quite simply as everything will fit with 1206, easy is fine for me.
Running a solder bead to do the too many leg ICs has always worked for me. I do have a few parts which have bumps on the bottom and are not really meant to soldering irons. Although I do have plenty of hot air and even hot air tools, I still prefer an iron.
I do use vias to make some parts easier to solder.
When I got in some 201 parts, the price being below return postage, they became a contribution to future archeologists.
Currently laying out version two of the PCB sets. Learned a bit about cramming things into a smaller case. Space available including shielded enclosure is 2.75" x 1.5" depth 1.375". This includes the pair of transformers needed to increase idiot resistance. The other big part are the three wire terminals.
It's very easy to prove that i'm right on all those aspects actually...
Did you build that digital preamp yourself?
Do you have any proof of it being shown to the AES members in a physical form and played in front of an audience?
Are you joking?
I wrote:
(bold feature now inserted)
using the introductiory bold words, the double dot and quotation marks and still it wasn´t clear that the text between the quotation marks was quoted?
Of course i forgot to mention the source so (mea culpa) it was
(source: Paul Frindle in a post over at gearslutz; Gearslutz - View Single Post - Paul Frindle - Is This Truth Or Myth? -)
But that it wasn´t clear surprises me......
@billshurv,
of course it is anecdotal, but what isn´t anecdotal at the end? How many witnesses are needed to convince someone else that an event really had happened?
I wouldn´t take the description (or the alleged mechanism) for granted, but surely would not dismiss his description lightheartedly, because it would be dumb to dismiss expert knowledge just so.
Of course it helps if you have read some of his publications and patents, read his posts over the years over at pgm or at gearslutz.
Imo he represents cleary the scientific down-to-earth approach i mentioned recently in another post.
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Why, Simon? Are-you working 12/24 in a lead battery manufacture or did you have disturbing symptoms ?
I'm not a specialist, but I have read that it takes years to be intoxicated, breathing big amount of lead vapors all the day long.
I doubt that leaded solder can emit a huge quantity of those vapors, And it has not been demonstrated the skin contact with lead is a problem.
Our time is a period of excesses of all kind, going from one extreme to the other.
Living in an aseptic environnement is the best way to weaken us against infections and allergies, don't you think ?
Any way, I have read that we all gonna die, one day or an other. Although of an incredulous character, I suspect there must be some truth.
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OK Prove it then.
As I have said before I have a miniDSP for digital RIAA. Other digital options are available.
What "digitlal" pre-amp? You can read here for free, they have lots of happy customers CHANNEL D - Pure Vinyl.
I was only interested in the viability of recording flat and digital RIAA. Everything in all my articles was built and tested. The lowest end MiniDSP and the mic preamp in a Tascam field recorder were adequate for the task.
The preferred tick and pop removal method is documented in a very good paper on forensic audio restoration. An open source project using it became abandoned, I simply don't have the bandwidth to revive it. The results are remarkable in most cases.
You said it's rubbish...you should prove it first.I simply expressed the simplest possible causes for a thing that anyone can check for himself.If you have a better idea...tell it us all!
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Yes the person making the claim has to provide the proof. Otherwise you are just full of hot air.
Scott has posted flat phono amp schematics as have others. You can DIY a DSP and the biquad information is available. What is your point?
What would be the absolute lowest level of a noise we can possibly hear at our best ?
Absolute threshold of hearing - Wikipedia
A friend of mine who is a medical doctor in hearing problems said that an adult can barely hear anything over 80...85db.
Dolby said the same thing...dolby S offers a max of 84db snr on cassette and you can't head a damn thing if there's no music on tape.
Attachments
I'll stop anything on Scott Wucer...He's from another world than me.I'll just have to accept what he sais...I'm just not interested further into that subject.At least not now.
Can you think of other causes for why you're not stressed about the noise on a 45rpm record the same as you are on a 33rpm one when you play it on the same phono preamp?
I'm going to accept your ideas too.
I have IIRO 2000 33RPM LPs and IIRO of 20 45RPM ones. I think that sums up why I am not stressed by it. Although friction is proportional to velocity vinyl formulation plays a much larger role. If noise bothers you, wet play the record.
All bets are off for 7" singles as they were not made with fidelity in mind.
All bets are off for 7" singles as they were not made with fidelity in mind.
@scottjoplin,
i´m still interested in your answer to my question:
"There is always real money at stake but who knows, so please tell me which way these people can get their expert status if not by predictable results and customer´s satisfaction?"
@Evenharmonics,
Aczel wrote:
"Since sheer guessing will yield the correct answer 50% of the time, a minimum of 12 trials is needed for statistical validity (16 is better,20 better yet)."
Statistical validity is given if a test really measures what it is intended to measure.
As an ABX test is a test for difference (audible difference in our case), a specific ABX test is statistically valid if it _really_ measures if a difference is audible.
If so, then obviously it does not depend on the number of trials.
If it does not measure what it should additional trials do not help.
Therefore Aczel´s statement was nonsense.
Sure. Some are writing nonsense like the statement Aczel published in his opinion paper.
Which is also completely nonsense, but as you refuse to educate yourself on the complex topic of sensory testing, i can´t help.
(It´s the old horse, water drink problem)
The information is out there, good literature for reading up was cited several times, so just do it; learning something does not harm and you would stop fooling yourself so often......
i´m still interested in your answer to my question:
"There is always real money at stake but who knows, so please tell me which way these people can get their expert status if not by predictable results and customer´s satisfaction?"
@Evenharmonics,
Aczel wrote:
"Since sheer guessing will yield the correct answer 50% of the time, a minimum of 12 trials is needed for statistical validity (16 is better,20 better yet)."
Statistical validity is given if a test really measures what it is intended to measure.
As an ABX test is a test for difference (audible difference in our case), a specific ABX test is statistically valid if it _really_ measures if a difference is audible.
If so, then obviously it does not depend on the number of trials.
If it does not measure what it should additional trials do not help.
Therefore Aczel´s statement was nonsense.
Sure. Some are writing nonsense like the statement Aczel published in his opinion paper.
Which is also completely nonsense, but as you refuse to educate yourself on the complex topic of sensory testing, i can´t help.
(It´s the old horse, water drink problem)
The information is out there, good literature for reading up was cited several times, so just do it; learning something does not harm and you would stop fooling yourself so often......
Can you translate that to me?
Google can't find anything on these terms you are using...
I am using 12 '' records for both 33 and 45.The smaller ones don't sound as good as the bigger ones.
I also use Dual 1219 with electronic speed regulator (sine generator VFD) and Dual 701 shure v15/type3, m75 and some other vintage carts like goldring, , philips ,telefunken, onkyo(that sounds better than all) and ortophon(cheap ones).I had a better turntable before, but i needed to give it away.The same problem on that too as it's nothing about the turntable...
On all of them i can hear the same problem when using a technics su-v 6 clone(basically a marantz pm62 modified to the original schematic that it tried to copy) .
I am not bothered on any valve preamp about dust noise.
I also use aiwa c22 which is almost as good as the valve ones and again the dust doesn't bother me too much on it.
BUT, clear thing is that with the Technics I'm very sensitive to the dust problem on 33rpm records.
Once i use 45 rpm records that problem is not anymore a problem...
............................
The velocity is the one that improve the sound quality, lowers the noise and Remove the dust much easier.The diamond tip is attached to a cartridge through a more rigid system than most dust is attached to the vinyl.
Maybe it's just that the sound is distributed on a longer and larger path on a 45 rpm record and the dust is just occupying a smaller size of the whole musical content, but at the same time the tip does have more energy to displace the dust particles and also it is loaded a bit more than a cartridge set to play a 33 rpm record so it must definitely have an effect on dust removal.
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