Berkeley 21 July 1994
			GEM 2.3 GHz Radiometer
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(*) Items already available


            Record of microwave components: orders and shipping
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Feed antenna, including transition
and waveguide filter
				Design and construction
				by FPM space, Torino
				39-11-650 3782
				Contact: E.Pagana

				Order sent: .... (depending on ASI money)

				Expected delivery: late Sept 1994 

				US$ about 3000

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First stage HEMT amp					
				Berkshire, Oakland, CA
				Tel. (510) 655-1986
				Contact: T. Lum

				Order sent: 20 July 1994

				Expected delivery: 5 Sept 1994

				US$ 2350
					
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Second stage amp
				MITEQ, Hauppauge, N.Y.
				Tel. (516) 436 7400 
				Contact: F.Maqbool (Ext. 254)

				Order sent 22 July 1994

				Expected delivery: Aug 22 -- Sept 5

				US$ 550

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Bandpass Tubular filter
				Thrilithic, Indianapolis, IN
				Tel. 800-344-2412
				Contact: D.Distler

				Order sent 22 July 1994

				Expected delivery: Aug 22 -- Sept 5

				US$ 165

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Detector Diode(* -Spare ordered)
				HP, Sunnyvale, CA				
				Tel. 800-538-8787
				Contact: George (Ext. 1105)

				Order sent 22 July 1994

				Expected delivery: Aug 20 (?)

				US$ 350


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Attenuators
				Thrilithic, Indianapolis, IN
				Tel. 800-344-2412
				Contact: D.Distler

				Order sent .....

				Expected delivery: ...... ( < 4 weeks )

				US$ 61 each (1--9)
				    55 each (10--24)

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Total of expenses (1994 July 18-22), including spare diode:

		First amp		2350 $
		Second amp	 	 550 $
		Bandpass filter  	 165 $
		Detector diode 		 350 $
		------------------------------
		Total                   3415 $
		------------------------------









                Electronics and temperature regulation
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Power supply
				+/- 15 volts supply centralized.
				Will need extension cables to get to 
				prime focus.

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DC amplifier
				Spare board available.(*)
				Needs to be modified to get adjustable
				gain scales and mounted.

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Temperature sensors
				Extra board to be wired at LBL.
				One board for 4 sensors.

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Temperature regulation
				Extra board to be wired at LBL.

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Cooling system 
				Electronics control centralized.
				Two MELCOR small unites available.(*)
				Two heat sinks available.(*)		

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