Midland Radio SP-300 service manual Vhf V.C.O, Uhf V.C.O

9	7
12									VCC	8
	VCO	TX		C212				L205
						R205		180nH
10				0.001
						2.2K			C217
									4P
11
								Q203
								2SC5084		6
						C213			OUT
					R204	4.7P
	R206				2.2K
	100
					C208			Q202
		C202						2SC5084
	L201				4.7P
		18P
	1.2uH
						C214
				C205		13P
MOD		R202		1.2P
		100K
13									C216
							L204		0.001
		C203		D202
							2.2UH
		1.2P
				1SV217
	C201			C206	L203	R203
	0.001				4.5t	4.7K
				2.7P					C211
								R207	13P
		C204		R201
								220
	D201	1.2P		100K		C215
	1SV217					0.001
14										5
	VCO		R X						VCC	4
16
							L305
				C312		R305	100nH	C317
3				0.001		2.2K		4P
								Q303		2
								2SC5084
									OUT
15 TUNING						C313
					R304	4P
					2.2K
R306
100
		C302			C308			Q302
	L301							2SC5084
		11P			2.2P
	1.2uH
						C314
						12P
									C316
									0.001
17							L304
C301				C306			2.2uH	C311
0.001				0.5P		R303		16P
						4.7K
	D301			L303
	1SV217			4.5T
						C315	R307
						0.001
							220
18										1

VHF V.C.O.

(148-174MHz Band Shown)

Schematic P/N: 770-030-0021 Rev. B

PCB Assy. P/N: 650-030-0021Rev. B

Notes:

1.ALL VALUES ARE IN OHMS, MICROHENRIES OR MICROFAR- ADS UNLESS OTHERWISE SPECI- FIED.

2.ALL RESISTORS ARE 1/10W 5%

UNLESS OTHERWISE SPECIFIED.

	9	7
12										VCC	8
						C212	R205		L205
									33nH
10						220P
			VCO	TX			2.2K
										C217
										4P
11
									Q203
									2SC5084
							C213		(MCO)		6
										OUT
						R204	3P
		R206				2.2K
		100							(MCO)
		L201	C202			C208			Q202
						4P			2SC5084
			10P
		100nH
							C214
					C205		10P		C216
MOD			R202		0.5P				220P
			100K
13
			C203		D202		L204
						L203	820NH
			0.75P		1SV229
						1.2t			C211
					(T8)
							R203		7P
		C201
					C206		4.7K
		470P			5P
			C204						R207
					L202				270
			1.5P				C215
		D201			470nH
		1SV229					0.001
14		(T8)									5
16		VCO	R X							VCC	4
						C312			L305
							R305		33nH
						220P
							2.2K
3									C317
									4P
									Q303		2
									2SC5084
										OUT
									(MCO)
							C313
15	TUNING
						R304	3P
						2.2K
	R306
	100								(MCO)
			C302			C308
									Q302
				13P		4P
									2SC5084
							C314
		L301					10P
	100nH
17										C316
										220P
								R309	C311
					C306		R303	OR	7P
	C301				9P		4.7K
			D301
	220P
			1SV229
						L303		R307
			(T8)
						1.2t		270
18											1

UHF V.C.O.

(440-470MHz Band Shown)

Schematic P/N: 770-030-0018 Rev. D

PCB Assy. P/N: 650-030-0020 Rev. A

PAGE -42- May 2001