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Step attenuator, POTI high end, for WE 300B etc Autoformer, US $512 – Picture 0
Step attenuator, POTI high end, for WE 300B etc Autoformer, US $512 – Picture 1
Step attenuator, POTI high end, for WE 300B etc Autoformer, US $512 – Picture 0
Step attenuator, POTI high end, for WE 300B etc Autoformer, US $512 – Picture 1

Step Attenuator, Poti High End, For We 300b Etc Autoformer

US $512

  • Aachen, Germany
  • Jan 29th
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 These Autoformer modules operate in a slightly different manner than traditional linearly switched volume controls. Rather than using a single switch, two discrete switches are used to control the level. The switch on the left has 12 posiitons that are in 3.75dB increments. The switch on the right has 3 positions allowing +1.25dB, 0dB and -1.25dB modification of the overall level. By using this dual switch arrangement 1.25dB steps are possible. The total attenuation range goes from +1.25dB to -41.25 dB in 32 steps. The nature of the device skips the -3.75dB tap so the steps are +1.25, 0, -1.25, -2.5, -5, -6.25, -7.5...1.25db steps to -41.25 and off. Each module is a mono unit and the added benefit of combining the two switch approach with the ability to adjust each channel indepenantly in 1.25dB steps is you now have a functional balance control. These modules use a similar method of non-linear switching to obtain a seamless +7 to -53dB of attenuation in 1dB steps. They also have a full remote level and balance control. The modules are 2" X 2" X 3.5" and are mounted by the switches. They come stacked 4X4 for approximately 140hy's of inductance, The switches have silver plated contacts. The core is 80% nickel and  the hardware is all non-magnetic. The modules wire up like any conventional pot or stepped attenuator. Only three connections (labeled on the PCB) are required.

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