Update: KN0CKs products are now available at http://www.kn0ck.com/HF_SDR/.

The fourth revision of the miniature HF upconverter for the RTL-SDR by KN0CK is up for sale, now that revision three has just sold out. Revision four has a 120 MHz oscillator, and is capable of receiving the 6m band.

Check out the release post over at KF7LZE’s blog, and the product sales page at the Easy-Kits store.