Glasshouse / Blore Edwards 1-pole 23-way switch / Mono Shunt Stepped Attenuator
This mono-shunt stepped attenuator features the Blore Edwards 1-pole 23-way switch, the OPZ-51259-1, with silver contacts. The NOS Audio Note was made to a similar specification. However, the OPZ-51259-1 has a lower torque, so it is easier to turn.
We have 23 volume positions from mute to near total volume through our tried-and-tested 2dB step values of resistors.
We offer the option to choose from 16 different resistor types for this kit.
SERIES/LOAD RESISTOR FOR SHUNT TYPE
The series/load resistor of the shunt stepped attenuator range is worth discussing. All the signal passes through this resistor no matter your position on your volume control. So, this resistor is worth an upgrade. A popular choice is the Charcroft Z-Foil range or Audio Note Non-Magnetic Tantalum. If you wish to upgrade them, add them to your cart. x1 for a each mono, x2 for a stereo and x4 for a balanced. Choose the resistance close to the impedance of the stepped attenuator you buy. For example, for a Stereo Shunt 50K, you would have to add 2 off the CART 50K000B: 50K 0.4W Charcroft Z-Foil Resistor. If you are ordering a built version, mention in the comments box that you wish to have them fitted.
Dimensions
Shaft: 6mm diameter x 13mm length
Bush: 10mm diameter x 12mm length
Body, including resistors fitted (internal part): 45mm x 52mm (oval shaped) x 22mm height
The front of the switch does possess a "non-turn" metal lug of 3.5mm diameter x 5mm in length that protrudes through the front panel, so provision is needed. If not required, this can be removed with cutters. If not, a 3.5mm diameter hole 13.5mm from the centre hole of the shaft is required.
Watch our Youtube video detailing the Glasshouse / NOS Audio Note 2-pole 23-way switch / Stereo Shunt Stepped Attenuator with Takman 0.25W carbon films fitted see - N.B. This follows the same construction as the Blore Edwards stepped HERE
For the 100K 0.25W and 0.5W Takman Metal & Carbon versions, we supply a 91K load resistor.
For the 10K 0.25W and 0.5W Takman Metal & Carbon versions, we supply a 10K 1W load resistor.
We can only supply the 50K, 100K and 250K options for the various Audio Note resistor types.
We can only supply the 10K, 20K and 25K options for the Charcroft Z-Foil type.
Available as a kit or fully built, the build cost is £20.00 +vat+p&p
PRICE (1 off) 10K, 20K, 25K, 50K, 100K, 250K
starting at £40.64+vat+p&p
For 0.25W and 0.4W Charcroft resistor kit versions, supplied with
- Blore Edwards 1-pole 23-way switch
- Selected resistor set (22 resistors)
- 0.2m x HGG 0.5mm diameter wire
- 0.05m x 0.5mm PTFE sleeving
- 0.5m x Mundorf 3.8% silver/gold solder
For 0.5W and 2W AMRT resistor kit versions, supplied with
- Blore Edwards 1-pole 23-way switch
- Selected resistor set (22 resistors)
- 0.2m x HGG 1mm diameter wire
- 0.05m x 1mm PTFE sleeving
- 0.5m x Mundorf 3.8% silver/gold solder
the picture shows - 0.25W Takman Carbon version