The search returned 2 articles:

  1. July 2013: Project: Add A UHF Link To A Universal Remote Control by John Clarke, PCBs: SC 15107131 [print issue] [online issue]
  2. July 2013: Project: Add A UHF Link To A Universal Remote Control by John Clarke, PCBs: SC 15107131, 11 shop items [print issue] [online issue]