I had a go first at a mini-gyrator board using SMD. Blimey, it’s hard work to get all these crammed into such a small footprint.
I did a quick test with a D3a and worked fine at 100V/10mA (low voltage of course). It was +35dB flat up until a couple of Mhz. Even the over-current LED works!
Footprint is as small as you can get: 45mm x 25mm 🙂
More to report later!
Fantastic! FWIW, I would love to have the option to purchase SMT mu-follower boards. I work with SMT enough that I’m pretty comfortable with it. Unless there are some ultra tiny 0205 etc. 🙂
Hi Ale, what is the output impedance in case of D3a with 1omA, is it low enough to drive a 600r RIAA?
Hi, it’s very low and you will need adding a series resistor to drive the network. There is an entry in my blog with the formula. Please search