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The alternative was to place the pump in an adjoining room or closet, and then run a long tube from the pump to the tonearm assembly. Noise was almost always a problem with those pumps, so having them in the same room with your playback system wasn't a good option. The pump must be able to deliver a fairly high volume of air at a very constant pressure (fluctuations in air pressure could lead to jerky movement of the tonearm). Third, the air pump needed for an air-bearing assembly posed additional engineering challenges. There weren't a lot of TT choices in the early to mid-1980's that were suitable for use with air-bearing linear tracking arms. Second, if you were going to invest in a good quality, air-bearing linear tracking arm, you needed to have a really solid, stable turntable that would accept the tonearm/bearing assembly. There are a number of practical and engineering problems, however, in making a good linear tracking assembly that is affordable.įirst, the tolerances neeeded to produce a high-quality, air-bearing linear arm are very tight, which means that the manufacturing costs are likely to be much higher than a conventional pivoted tonearm. Linear tracking arms are conceptually the "ideal" way to reproduce LP's, since the path of the tonearm/cartridge duplicates the tangential path of the recording lathe cutter head. As someone who tried several of the linear tracking arms in the mid-1980's, I found them to be a mixed bag. They are not without their problems, especially in set up requirements, but they do perform at a very high standard. The air-bearing types finally showed what could be done with a linear tracking arm, and these are some of the best arms on the planet. The mass market ones that were commonly seen in the 80s, like HK/Rabco,Pioneer, Technics, etc, were too "loose" to provide what was really needed to make an arm like this perform at top level. The thing about linear tracking arms is, that it takes a high quality, and usually high cost application to make the most of this design. Eminent Technology ET-2.5 is one of the more commonly seen separately available linear tracking arms. Rockport, Walker, Forsell, Versa Dynamics, Maplenoll,Goldmund, Clearaudio are a few of the ones that have the linear tracking type arms on them as a combo/package.
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The normal place to do this type of change is in the Worksheet_Change or Workbook_Change event handlers.Ha! Phasecorrect, you will get some posts on this thread for sure.Īctually linear tracking did "take off", and it is seen on some of the best, and most expensive turntables made. This is particularly likely if you know that there are macros in the workbook and the data transformation occurs only when you enter the value into a limited number of cells. If the value changes back to what you expect, then you know you've got a formatting issue that you need to correct.įinally, it may also be possible that there is a macro intercepting what you enter into the cell and dividing it by 100. The easiest way to check this out is to select the cell and then press Shift+Ctrl+~ (that's the tilde character, found just below the Esc key). In this case, the value isn't being changed as you enter it instead the appearance of the value is controlled by whatever format is applied to the cell or cells. If the problem persists when you keep entering data, it could be because of some format applied to the cell. You should note that any values entered with "fixed decimal" entry turned on won't change back to their original values when it is turned off the decimal point on the values is actually moved the number of places indicated in the setting. The advanced options of the Excel Options dialog box.