stanley chu Posted September 18, 2000 Share Posted September 18, 2000 In upgrading the crossover (AL-3 type) of my La Scala I find it most desirable that the T4A autoformer can be replaced by a autoformer with multiple tap connections so as I can adjust the squawker level to suit different tastes. I would like to reduce the squawker output level just a little but don't want to use resistors. Al's ALK crossover is having a UTC #3619 autoformer with multiple tap connections. I don't know if this can be a direct drop in replacement of the T4A. I wonder if other La Scala users with AL-3 crossover will have this need as well? And if so can we have enough demand to have it specially made? Any Ideas? Al? Quote Link to comment Share on other sites More sharing options...
Al Klappenberger Posted September 19, 2000 Share Posted September 19, 2000 Stanley, I have never had a chance to measure the tap position on any of the Klipsch autoformers except the T2A. I have a hunch that the T4 is simply a T2A with the unused taps removed to reduce cost. Why else would a single tap be marked "3"? Besides, tap 3 on the T2A is the right one for the K55M squawker. All this leads me to believe that the #3619 from Universal Transformer will work in the AL-3 perfectly. There's no guarantees though. It is possible to make fine adjustments to the ratios using the extra "x" tap on the #3619 by "floating" the ground return of the squawker and the 5 mHy inductor connected across it (AL-3) and connecting the common connection to a different tap than "0". This allows all sorts of possibilities. For example: connect, turns ratio, -dB x-3, .3234, -9.8 dB 0-2, .3548, -9.0 1-4, .4567, -6.8 0-3, .5012, -6.0 x-4, .5301, -5.5 2-5, .6452, -3.8 NOTE: This table does NOT apply to my network, only the Klipsch networks. Al K. Quote Link to comment Share on other sites More sharing options...
stanley chu Posted September 19, 2000 Author Share Posted September 19, 2000 Al, Thanks for taking the time to reply! Great suggestion on using the extra X tap with the the table of figures. The only way to know is to try it out. I shall order the #3619 autoformer and will post the result once available. Best regards, Stanley Quote Link to comment Share on other sites More sharing options...
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