My Passive Controllers 2This update 1st October 2011 New Shinkoh mono attenuator
View this page full screen passive preamps page one
Shinkoh (mono) stepped attenuators Note. I spend many hours listening to my music. I use a number of passive preamps so I wasn't really expecting a huge difference with the Shinkoh described by the HiFi Collective (see links). Based on my ears I feel that in mono form these stepped attenuators built has described will dazzle. If you are thinking about trying a passive preamp THESE ARE SIGNIFICANT! My Shinkoh clone was built between the 26th and 28th Sept 2011. I used this hificollective webpage as a starting point. Some of the images below were taken from this source. Key Links http://www.hificollective.co.uk/components/shinkoh_stepped_attenuator.html
A completed 24 step mono shinkoh pot (web image)
I had a pair of ELMA 24 step twin wafer sitches on the shelf. I bought a complete set of 0.5W metal resistors from Jaycar Electronics. At the time of construction Jaycar could only supply a carbon type for the 8.2 ohm resistor. I have attached a document which lists the resistors I used and their actual values I added an extra step in the middle listening range (using a 1.58K in-between the 1K3 and 1K8. I decided to remove the 91K (at the top end) Both the added 1.58K and input-output resistor are HOLCO. (whole copper) All contacts and resistor leads were carefully cleaned with 2-propanol before soldering. The earth rails are 1mm fine silver. The connecting leads are teflon coated silver coated copper.
|
|
|
|
|
|
|
|
|
