Elma 2 pole 47 way switch, A47-SERB2-THT
Elma A47-SERB2-THT, 2 pole 47 way Switch
The much awaited 47 position switch is now with us, we are stocking the 2 pole (SERB2) and the 1 pole (SERB1) version. A high quality switch as we have come to expect from Elma with extremely durable 3 micron gold plated contacts throughout. The switch utilises a PCB to make your connections. Shorting, make before break type. The 2 pole 47 way is suitable for use as a stereo Series Shunt stepped or a stereo Series stepped or to wire up to a pair of 47 step transformer volume control. Also as a 47 position ladder type stepped attenuator.
Originally designed for use as a Series stepped attenuator whereby you effectively have a long chain of resistors and the switch runs along the contact of each adjoining resistor. We find this method the least favourable sonically as the signal is passing through numerous resistors and solder joins. However the choice is yours.
This switch can also be used to make our preferred Glasshouse Series Shunt stepped attenuators. Here we have one Series resistor, the load or input resistor that is seen at each step of the switch. This resistor forms a voltage divider with the a specific shunt resistor as you make your way round the switch. Thus at each position there are only 2 resistors involved and one contact.
We are selling the switch but also fully built stepped attenuators with a choice of different resistors. We have chosen to sell the stepped attenuators as fully built because they are incredibly fiddly to construct and we are only charging a nominal fee to build for you. It will save you a lot of time and a lot of expense if mistakes are made during construction. - For more information on this please click HERE
The Elma A47 can be used in conjunction with the Remote Control module, the Remote Audio PLUS with LIN Motor. For more information on this please click HERE
If you require the stop pin for this switch, click HERE
BODY: width 36mm, depth 36mm, height 43mm
BUSH: diameter 10mm, height 10mm
SHAFT: diameter 6mm, height 15mm
Please Note that the only version of stepped attenuator that fits with-in these dimensions is the COMPACT 0.25W
Price (1 off) £180.00 +vat +p&p