Re: [LAU] How is the bass mixed? Per-channel frequency analysis? Histogram?

On Thursday 06 February 2014 11:22:43 Vytautas Jancauskas did opine: wrote: This may be an artifact of the std vinyl playing gear at radio stations, used historically where the records were played live on the air by local dj's. The majority of the stations I'd had experience with usually were equipt with decent turntables and arms, but because it was indestructable, had the old Pickering/Stanton D500 cartridge fitted. Those were so stiff they ate records with brand new needles in them. I was the CE at a small county seat CA radio, am-fm op in NE CA for a couple years, went in just as Olivia-Newton John's "Physical" was climbing the charts. Figuring it would last several months near the top of the playlist, they ordered 10 copies because they were destroying those 45's from cue burn & skipping at about 1 a week. Checking the arms, I found them set for about 12 grams, and that the needles were a good 10,000 hours old, resembling a lathe tool under the scope. I could not see the needle move when I pulled a finger across it. I knew the Shure RE15 was a good cartridge, so I hied myself over to the local Radio Shack, who had just one (small town shack) under their own label for about $57. Cecil (owner) had a cow about it. I said listen to it. 4 days later I did the same, readjusting the arms for 1.5 grams, with his blessing to the other TT & arm. They were able to cut the number of records being burned up to zero. We had 8 copies of "Physical" that went to the morgue in the garage, never touched by a needle. Pet Clarks "Downtown" same story. Cue burns and skips simply never happened again. We had one big fellow who was doing the evening shift that had arms & hands that weren't used to handling an arm that weighed so little, he was around 6'6" & 325 lbs and he managed to destroy a needle by rotating it in the elastomer mount, I took some tweezers and twisted it back vertical. Still in service and looking good under the microscope 2 years later when I headed east. That $115 change had probably saved them 10 grand in records not bought in that 2 years. Radio stations, because of the expected high play counts, have to buy specially licensed records at 3 or 4 times what we pay at Wallies, and still have to keep play records for ACAP/BMI & pay those fees. So it can be a major ongoing expense. However with that cartridge in that old viscous damped Grey arm, could have been quite capable of playing one on Emery Cooks 78 rpm lp's of an earthquake, in real time or sped up 16x as some cuts on the record were. It also could repeatedly play the Mercury recording of the 1812 overture without damaging either the Harkness Tower bells or the cannon shots. Play that record once with a lessor cartridge and the bells turned into fingernails on a blackboard. Even if it was a mono recording, that record was and is a technological tour de force. Those cannon shots? Recorded by an Altec M21B mic, located about 6" below the muzzle of the cannon. That mic was capable of around 135 volts peak to peak output, admittedly with some 2nd harmonic distortion, but it did NOT clip. I do not think its equal has ever been made since. That cartridge tracked at 1.5 grams, .75 grams on the needle, and .75 grams on the carbon fiber brush that rode slightly inboard to clean the record before the needle got there. Does anyone sell something like that today, 35 years later? Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> NOTICE: Will pay 100 USD for an HP-4815A defective but complete probe assembly.