I don't recall that Ray.
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Archimago strikes again
- Thread starter Purité Audio
- Start date
Repercussions of a youth mis-spent?
I will put it down to Urban Legend, or maybe some FUD from the Vacuum Tube Industry.
Cosmic Rays knocking atoms out of the crystalline structure, things like that.
At that time, my future life of crime and moral turpitude was but a tiny seed adrift in the ether and not yet planted in my fertile mind.
I still believe that most everything I need to know about electronics is in the pages of this book. Plenty of design schematics in the back pages too. Kind of like a Bible
I paid all of $1.25 for it brand new.
What's that Chinese symbol on the left doing there?
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On the dac:
Those yellow boxes are relays. Usually a relay is a sign of higher quality design as opposed to using electronic switches that may have more leakage. But the brand of those relays raises eyebrows. It is Huigang. A search shows no company and only ebay parts.
View attachment 4084
None of the major distributors (Mouser, Digikey, Arrow, etc.) carry the brand. Is it going to get noisy sooner? Stop working? Who knows.
The rest does look clean and is a step up from China special products but ultimately I can't give it a thumbs up based on what my antenna picks up.
Those relays are available from a company called www.farnell.com which is no ebay outfit. They have silver alloy contacts. A few other smaller suppliers have them under the Multicomp brand name which is the same parts as Huigang.
The datasheet they have (which means nothing for reliability I know nor that the data is even true) is here:
http://www.farnell.com/datasheets/311677.pdf
As Emotiva has their gear manufactured in China those relays may or may not be a red flag. One imagines distribution in China is no problem. They may simply not have expanded much outside the country. With so much electronic gear made in China there may be little incentive to do so even for a decent manufacturer of such items as relays.
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I had one of those. Mine was like this only in white. Unfortunately my Mom left it on the dash of a closed up car in the summer. Black car. 95 degree or so day. It melted a bit. And quit working.
If it had been a vacuum tube model, it would have been too big to leave on the dash.
That photo of the RCA is exactly mine.
It has a nice leather case,with a stiff leather handle, that you can lean it upon to angle it upwards at varying degrees.
I turned it on, still works.
It may outlast me.
It has a nice leather case,with a stiff leather handle, that you can lean it upon to angle it upwards at varying degrees.
I turned it on, still works.
It may outlast me.
Don Hills
Addicted to Fun and Learning
I maintain that the brown goop in the pictures is to hold the capacitors. The mess made by leaking electrolyte looks quite different. I've seen plenty of both over the years. The stuff in the pictures is entirely typical of Chinese manufacture where a squirt of goop is applied in a slap-dash fashion after the board is soldered. From close examinations of boards where I've found it (and I've found it a lot), the goop appears to be similar to a contact adhesive such as ADOS F2. It's reasonably benign, except when you have to remove the gooped component, usually a cap that has gone high ESR / bulged. What I hate with a passion is the goop known as "Corrosive Brown Goo". It starts out white and somewhat flexible. It has quite a thick texture, tends to say where it was put unlike the goop dicussed earlier which is quite runny when wet. The trouble with the white goo is that over time it turns brown and then black, hardening as it goes until it's brittle and weak. But the worst thing is that, as it darkens / hardens, it turns corrosive and eats copper tracks and plated steel component legs. I once acquired a high-end Sony CD deck (multiple BB DACs, all copper plated chassis, weighed a ton) that didn't work. The goo had eaten the legs off quite a few components. Fortunately it was fixable.
(I quite like this deck, it's from a time before the safety nannies stepped in. The headphone output will run 2 watts into 32 ohm phones before clipping, and it was gain staged in the days before brickwalled CDs. I have to be very careful to turn down the volume on the headphone out when changing from old to new CDs.)
(I quite like this deck, it's from a time before the safety nannies stepped in. The headphone output will run 2 watts into 32 ohm phones before clipping, and it was gain staged in the days before brickwalled CDs. I have to be very careful to turn down the volume on the headphone out when changing from old to new CDs.)
I have seen and repaired caps with exactly the look of what is under those caps. That said, your conclusion is correct because I see the goop higher up on the capacitor so it must have come from an applicator.
The issue remains using no-name components in an area where longevity is a serious problem. There are countless devices that have died because of Chinese-special caps.
The issue remains using no-name components in an area where longevity is a serious problem. There are countless devices that have died because of Chinese-special caps.
Don Hills
Addicted to Fun and Learning
Probably too much to hope that the small caps in those cans were real Rubycons...
That picture has been making rounds for a while. No one knows the origin of it. It might fake, or someone trying to replace a larger capacitor and all they had was that (used?) Rubycon cap. It could also be true fake with recirculated cap.
Mivera
Major Contributor
Here's what a proper modern power supply looks like:
Keith_W
Major Contributor
So, I have kept quiet for a few days on this thread. None of you have spotted the elephant in the room? And you call yourselves "Audio SCIENCE Review"???
Feel free to 'bring the SCIENCE ' Keith
Strictly speaking there is not much true scientific thinking ( mentality) at ASR.. But we do our best, I blame amir.. Should of called it BAWATG ( bitter audiophiles with axe to grind)
Being a little more serious I think the brothers all want to explore and share in the understanding of audio.. With the objective of achieving better sound in the home or purely as a accidemic excise possibly.
The pure aspiration to understand can be sullied by a preordained motivation or partisan bias but non of us are perfect Keith . I can't remember any scientific expressions of yours that have been curtailed by the membership, certainly non that would warrent the undertones of contempt that seem to be emanating from your recent posts..
I beg to differ with you on that Thomas.
We currently only have one member that consistently expounds audiophool delusional ideals. The rest are at least leaning to a objective/scientific manner of SQ evaluation.Cheers
watchnerd
Grand Contributor
I'll bite. What was missed?
watchnerd
Grand Contributor
I beg to differ with you on that Thomas.
Cheers
I dunno...there are a lot of amp porn pics posted, a true sign of backsliding sinners...
