This is one of my "designs" (hacks). The Bearhug Compressor is a tonally transparent, low-parts count FET compressor. It has a short but natural sounding attack and can works as boost with benefits with very little compression to something a little more squishy than the Orange Squeezer with a little bit of a "duck and swell" sustain effect. It has very high input impedance and low output impedance. It was also designed to be very easy to build and mod and uses no difficult to find parts.
If you like what you hear and are interested in building one, please visit my website (jonpattonmusic), or look me up on the Madbean forum or DIYstompboxes (as MidwayFair). 1776 Effects sells a PCB for this effect, which this one was built on. If you don't build but you still want one, you can contact me about building you one.
Credit where credit is due: This circuit design uses some elements from the Lovesqueeze and Jack Orman's (AMZ) Mosfet booster. Mark Hammer and PRR on DIYstompboxes helped to understand the rectifier (the part the does the decay/hold). Joshua McClarren (Gtr2/1776 Effects) designed etch and PCB layouts. Extra props to R O Tyree on DIYSB for his help in understanding compressors in general.
The circuit are is creative commons; please share alike and credit the above individuals if you make any derivative products.