Hi to all
Since I have shipped a good handful of these “missing link” modules, I felt it time to start a customary, official, build and support thread. This is currently the most complicated module kit that I have at the store so I think this thread will be very important.
Do to some of the tricky physical nature of this build, I do already have an over-view, assembly aid
PDF put together. Currently, this PDF is considered “preliminary”. Mostly due to the pics. What you will see in this pre-lim doc are just quick phone pics intended more as placeholders. These will also serve as a guide line
, so that my hired photographer has an idea of what I feel is important. That hired gun is our resident “Newbie Builds...” guru ‘Chunger. After seeing the quality and professionalism ‘Chung completes his projects with, I felt it only natural to officially “hire” him for this one.
So, here is the pre-lim PDF. Feel free to let me know if you see anything that seems wrong or maybe unclear. This will probably be a work in progress for at least a few weeks.
Since the VC528 has a discrete, balanced, transformerless receiver stage, there is a CMRR trimmer that must be properly setup. I have recently finished a document that will guide those unfamiliar thru that process. That can be found here. I should point out that I do not recommend using a freshly built DOA in the receiver stage during this adjustment, unless you are 100% sure the opamp is functioning correctly. A stable and correctly operating DOA is a must for the CMRR adjustment to be right!
More detailed info on the circuit can be found here
on my site.
Of course we have a dedicated 500 series mod for those naughty DIY types that have not joined the 51x party! Shame!
And a bit of eye candy for fun…
************************Recall Sheet pdf downloads:1 module2 modules4 modules6 modules
************************Having trouble with your VC528 build?
Hopefully these Troubleshooting Tips
Happy building and fire away with any questions that may arise!