ie: paid way too much for relays for no reason other than they were the most expensive ones in the catalogue, and therefore "the best".
I know the feeling... flipping through the Mouser catalogue, and see those $300 relays, and think, "hell yeah, make a preamp using THOSE".
freaking high school, right there.
freaking high school, right there.
and a bad passive design would have AC in the BOX John? I have not seen such a device ... are you expecting a significant piezoelectric effect from such an expensive switch? if not what other effect might a small amount of vibration cause in a large passive control? and how exactly does selected areas of damping material on some of the flat surfaces alone, prevent this effect?
you must have different meanings for the words clean and direct over there in the USA? how else would you wire up a control of this type? apart from, more directly...
as discussed, the fact they are not bundled means there is more likelyhood of ground loops because it makes a more effective aerial and coax/foil will do nothing to avoid EMI
you must have different meanings for the words clean and direct over there in the USA? how else would you wire up a control of this type? apart from, more directly...
as discussed, the fact they are not bundled means there is more likelyhood of ground loops because it makes a more effective aerial and coax/foil will do nothing to avoid EMI
John Curl said:
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A passive attenuator done right:
Weiss :: High End : ATT202 PASSIVE ATTENUATOR
No AC in the box, just 12VDC. No DC as well if you can live without the remote. Single input.
Cheers
Giorgio
Weiss :: High End : ATT202 PASSIVE ATTENUATOR
No AC in the box, just 12VDC. No DC as well if you can live without the remote. Single input.
Cheers
Giorgio
The wiring on John's example is unnecessarily long. Put a GSM phone near it when it's searching for a tower and let me know what you hear. Most amps have the token "RF filter" with some lame 0.01 uF cap but really have never tested it.
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Looks nice. I'm afraid to ask the price...
But let's not lose the forest for the trees- all the units we're talking about here are unity gain, which is correct for modern sources. Line stages with gain are an accretion from the '60s. Steve's circuit has some gain from the input transformer because of some oddball headphones' requirements, but for line-stage-only use, one could certainly use a 1:1 input transformer.
Strictly speaking right angle traces produce an impedance dip as there is more copper area going around the corner. One can chamfer the outside corner to compensate (of course its only important if you are trying to control the impedance). And yes angles less than 90 were problematic for over etching.
Thanks
-Antonio
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Magnetic Conductors...
Magnetic reed switches and large selector magnet ???....bad for audio according to previous discussions.
Dan.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Magnetic reed switches and large selector magnet ???....bad for audio according to previous discussions.
Dan.
Jan,
I've been told by the Italian importer of Weiss that the ATT202 was born as a custom design made for a single customer that was willing to pay an outrageous - even by high end standards - amount of money just for the convenience of the remote in a passive setup. The custom made device then became a standard product but it soon became discontinued - or, at least, it looks like as it is no longer listed on the website product page. I guess that the passive attenuator was somewhat overlapping to the other product in the line and maybe too expensive for mere mortals.
Cheers
Giorgio
I've been told by the Italian importer of Weiss that the ATT202 was born as a custom design made for a single customer that was willing to pay an outrageous - even by high end standards - amount of money just for the convenience of the remote in a passive setup. The custom made device then became a standard product but it soon became discontinued - or, at least, it looks like as it is no longer listed on the website product page. I guess that the passive attenuator was somewhat overlapping to the other product in the line and maybe too expensive for mere mortals.
Cheers
Giorgio
Since '09.
(Bad start, due to the very low dollar exchange level till mid 2010. The unit went from +$7k then down to ~$4.5k now. Shop around, and they go for under $3k)
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you could at least post a decent example for us to discuss, several better ones have since been posted over this somewhat inept version which has only shiny parts going for it. I can only find fault with that one and weve all had our say, now its simply boring and dare I say; trolling... to post it again. what possible positive outcome is there to post it again, you dont like this person? hes a competitor?
I think its a pretty bland comment and does not speak in favor of you at all, you sometimes disagree with yourself.. since when do a bunch of opinionated people agree totally about everything? can you really have so little experience with the human race that this amuses you and makes you feel somehow better than when this occurs? then again I suppose the thread has moved on a few pages overnight and it could use being reaffirmed.
I thought we all (except for you) had pretty consistently come down against it for pretty similar reasons, what is it we didnt agree about? many see that a well executed passive preamp has its place in some systems, myself I dont use any analogue sources these days so it has no place for me, but the Weiss is a nice use of technology and is rather pretty without enough extra wire to make another 9 of them. the other examples are orders of magnitude more sophisticated than this one above
perhaps it surprises you that one person likes the relays and another doesnt? really?
I think its a pretty bland comment and does not speak in favor of you at all, you sometimes disagree with yourself.. since when do a bunch of opinionated people agree totally about everything? can you really have so little experience with the human race that this amuses you and makes you feel somehow better than when this occurs? then again I suppose the thread has moved on a few pages overnight and it could use being reaffirmed.
I thought we all (except for you) had pretty consistently come down against it for pretty similar reasons, what is it we didnt agree about? many see that a well executed passive preamp has its place in some systems, myself I dont use any analogue sources these days so it has no place for me, but the Weiss is a nice use of technology and is rather pretty without enough extra wire to make another 9 of them. the other examples are orders of magnitude more sophisticated than this one above
perhaps it surprises you that one person likes the relays and another doesnt? really?
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Not So Simple....
Dan.
It looks like those output transformer primaries are permanently connected...is that a good thing ?.
Dan.
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