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Table 5-1. Tubes and Semiconductors.

SYMBOL	FUNCTION	TYPE
Vl5A V15B Vl6A V16B Vl7A V17B V301	AVC Rectifier (both diodes) product detector first af amplifier Receiver af output amplifier ALC rectifier (both diodes) Second receiver mixer Varlable-frequency oscillator	6BN8 6BN8 6EB8 6EB8 6BN8 6BN8 7543

SYMBOL	FUNCTION	TYPE
CR1- CR4 CR5 CR6 CR7 CR8 CR9 CR10 CR11 CR301	Balanced modulator matched quad Receiver rf trimming Calibrator harmonic generator Screen voltage gate ALC static bias control Receiver mixer isolator Cathode follower Isolator Rf ampililer AGC time-constant switch Dlode switch for C308	FA4000 HC7001 1N34A 1N1490 1N458 1N458 1N1490 1N458 1N34A

5.5 AVAILABLE ACCESSORIES

Table 5-2 Available Accessories

ITEM	FUNCTION	COLLINS PART NUMBER
136B-2 Noise Blanker 312B-3 Speaker 312B-4 Station Control 312B-5 Station Control 312C-1 Speaker 312C-2 Speaker 312C-3 Speaker 351D-2 Mobile Mount 351E-4 Mounting Plate 351R-1 Rack 351R-2 Rack NMount	Blanks nolse pulses when the noise components present on the antenna have energy distribution In the 40-MHz portlon of the spectrum and when the noise pulses have a repetition rate not In excess of 100 000 pulses per second. Statlon speaker Speaker, phone patxh, directional wattmeter, and station control switches. Combination of feattures and functions of: 3l2B-4 Witb a vfo to permit separate transmit and receive frequencies Single rack-mounted speaker Two rack mounted speakers. Three rack-mounted speakers. Mount for KWM-2 or KWM-2A mobile operation. Mount KWM-2 or KWM-2A on tabIe or bench. Mounts one KWM-2 or KWM-2A. Front panel edges are slotted to fit standard relay rack centers Grey finish 8-3/4 Inehes high by 13-3/16 Inches deep. Mounts one 312B-4, 312B-5, ot 516F-2. Front pannel edges are slotted to fit standard relay rack centers. Grey finish 8-3/4 Inches High by 13-3/16 Inches deep	522-1661-00 522-166-00 522-1167-00 522-1168-00 522-3526-00 522-3527-00 522-3528-00 522-1726-00 522-1482-00 522-2665-00 522-2666-00