2009年11月15日 星期日

Dale 23 Steps Attenuator



OVERVIEW

1. Dale resistors, 23 step attenuator and knob.
2. Ladder type structure, 23 sections.
3. Log scale attenuation.
4. Rotary are Made-before-break

The DIY Kit come with a resistor pack, 23 step rotary, and aluminum knob. The available values are 10k, 50k, 100k, and 250k ohm.



ASSEMBLY GUIDE
The circuit diagram displays the configuration of the serial resistor network (ladder type) which consists of Rin and Rg. For one channel, there are 23 pair of Rin and Rg. The total equivalent resistance R=Rin + Rg, this value are fixed, so that the input resistance is more or less the same (ideally we want it to be constant)


Procedures to assembly:
1. Identify the resistor values (Rin and Rg) for two channels according to the following resistor list (10k, 50k, 100k and 250k). You could paste the resistors by plastic tapes on a paper one by one, where the number of 1 to 23 are marked.
2. Locate the postion 1, 2, 3, ..., 23 position of channel 1 and channel 2.
3. Solder the resistors Rin and then Rg.
4. Connect the GND, signal in, and signal out.
5. Finally, test it and good luck.





The complete one should look like (but the wire colors maybe different in different cases):


The resistor list for 10k (the resistor values started by position 1 and till to position 23):

The resistor list for 50k (the resistor values started by position 1 and till to position 23):


The resistor list for 100k (the resistor values started by position 1 and till to position 23):


The resistor list for 250k (the resistor values started by position 1 and till to position 23):

2 則留言:

  1. Hi

    Where can I get the 100k Dale stepped attenuator kit?

    Thanks

    morme@gte.net

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  2. What is your email address? I would like to contact you about your products.

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