Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!rutgers!mit-eddie!genrad!decvax!ucbvax!oz.berkeley.edu!bks From: bks@oz.berkeley.edu (Brian K. Shiratsuki) Newsgroups: rec.audio,sci.electronics Subject: Re: INTERCONNECTS Message-ID: <18562@ucbvax.BERKELEY.EDU> Date: Fri, 24-Apr-87 13:34:39 EST Article-I.D.: ucbvax.18562 Posted: Fri Apr 24 13:34:39 1987 Date-Received: Sat, 25-Apr-87 20:46:29 EST Sender: usenet@ucbvax.BERKELEY.EDU Reply-To: bks@oz.berkeley.edu (Brian K. Shiratsuki) Organization: University of California, Berkeley Lines: 103 Xref: mnetor rec.audio:1392 sci.electronics:602 In article <196@raster.UUCP# ross@raster.UUCP (Ross Werner) writes: #In article <18511@ucbvax.BERKELEY.EDU# bks@oz.berkeley.edu (Brian K. Shiratsuki) writes: # ##anyway, i thought i could hear a difference between this interconnect, ##and the ``comes with the component'' (regular) kind of interconnect, ##but not really enough to be certain it wasn't psychosomatic. #... ##i would assume that standard measurements (resistance, impedance) between ##regular and fancier interconnects do not differ, else we wouldn't argue about ##these things. does anyone have any evidence to the contrary? has anyone ##performed any measurements to take into account the level and impedance of ##the source, which might be more meaningful measurements? ## ## brian # #I did some playing around with trying to measure differences between cables. #Using a function generator, a 'scope, and an HP gain-phase meter (shows #amplitude and phase differences between the two inputs)... #...I also varied the terminating resistance, using 1k, 10k, #47k, and 100k resistors at the non-driven end of the cable. I tried the #following cables: El Cheapo from Radio Shack, Monster Cable Interlink 2, #Monster Cable Interlink 4, and "hardline" - essentially coax where the #shield is a solid pipe (not braid) and is used for interconnects at #gigahertz frequencies. # #The results? NO MEASURABLE DIFFERENCES FROM DC TO 250K Hz. The function #generator wouldn't go any higher - hey, it was cheap, and all I could #scrounge. # #...Anyone have any suggestions for a more thorough test? # #ross hm, i wish i had such equipment to play with. the load is identical enough, though i probably also have a measureable amount of (grid to cathode) capacitance. the frequency range is more than adequate, since my preamp doesn't pass dc, and the audible difference seems to be well below the upper limit of my hearing. did you consider using a real cartridge as a source, playing some sort of record with test tones? also, you didn't mention the amplitude of the function generator, but i assume it was around 1mV? this result may be more be more applicable to the pre to poweramp interconnect (the audible difference here is much subtler, if it exists). Newsgroups: rec.audio,sci.electronics Subject: Re: INTERCONNECTS Expires: References: Sender: Reply-To: bks@oz.berkeley.edu (Brian K. Shiratsuki) Followup-To: Distribution: Organization: University of California, Berkeley Keywords: In article <196@raster.UUCP# ross@raster.UUCP (Ross Werner) writes: #In article <18511@ucbvax.BERKELEY.EDU# bks@oz.berkeley.edu (Brian K. Shiratsuki) writes: # ##anyway, i thought i could hear a difference between this interconnect, ##and the ``comes with the component'' (regular) kind of interconnect, ##but not really enough to be certain it wasn't psychosomatic. #... ##i would assume that standard measurements (resistance, impedance) between ##regular and fancier interconnects do not differ, else we wouldn't argue about ##these things. does anyone have any evidence to the contrary? has anyone ##performed any measurements to take into account the level and impedance of ##the source, which might be more meaningful measurements? ## ## brian # #I did some playing around with trying to measure differences between cables. #Using a function generator, a 'scope, and an HP gain-phase meter (shows #amplitude and phase differences between the two inputs)... #...I also varied the terminating resistance, using 1k, 10k, #47k, and 100k resistors at the non-driven end of the cable. I tried the #following cables: El Cheapo from Radio Shack, Monster Cable Interlink 2, #Monster Cable Interlink 4, and "hardline" - essentially coax where the #shield is a solid pipe (not braid) and is used for interconnects at #gigahertz frequencies. # #The results? NO MEASURABLE DIFFERENCES FROM DC TO 250K Hz. The function #generator wouldn't go any higher - hey, it was cheap, and all I could #scrounge. # #...Anyone have any suggestions for a more thorough test? # #ross hm, i wish i had such equipment to play with. the load is identical enough, though i probably also have a measureable amount of (grid to cathode) capacitance. the frequency range is more than adequate, since my preamp doesn't pass dc, and the audible difference seems to be well below the upper limit of my hearing. did you consider using a real cartridge as a source, playing some sort of record with test tones? also, you didn't mention the amplitude of the function generator, but i assume it was around 1mV? this result may be more be more applicable to the pre to poweramp interconnect (the audible difference here is much subtler, if it exists). brian