NOVA, The Netherlands Research School for Astronomy, is the collaboration to advance astronomical research between the universities of Amsterdam, Groningen, Leiden and Nijmegen in The Netherlands. As part of its mission to conduct astronomical research at the top international level, NOVA develops instruments for the foremost telescopes and observatories around the world. To this end NOVA maintains several groups of experts in instrument development, one of these being the NOVA sub-mm instrumentation group, located at the Kapteyn Institute of the University of Groningen. The NOVA sub-mm group is currently engaged in the development and construction of sub-mm receiver cartridges for the Atacama Large Millimeter Array (ALMA) in Chile. Specifically, the current development is for the Band 2 receivers, sensitive to wavelengths from 67GHz to 116 GHz. Each of these receivers consist of a Warm (WCA) and Cold (CCA) Cartridge Assembly. A total of 73 receivers, each consisting of a WCA and CCA will be built, tested and delivered, under a contract with the European Southern Observatory (ESO). We intend to award the contract for  the so-called YIG Oscillators using the negotiated procedure. YIG Oscillators are highly pure, tunable sources of an oscillating reference signal, based on a Yttrium-Iron Garnet sphere. See the document at Mercell for more (technical) information about the YIG Oscillators.    NOVA intends to award the contract of the delivery of 69 YIG Oscillators to Micro Lambda Wireless inc. This type of YIG Oscillator is a highly special component, previously developed specifically with for application in astronomical sub-mm receivers. The supplier Micro Lambda Wireless has been involved in this development and has delivered YIG Oscillators for the other receivers previously produced for ALMA. For reasons of commonality, the YIG Oscillators should be of the same type from the same supplier. Our market research has not turned up any potential alternative suppliers. If you don't agree with our intention to award the contract, you can send a message or start summary proceedings at the Rechtbank Den Haag within twenty (20) days of our publication.