AWA 259B, 259V Diagram

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"Radiola" Battery Dual-Wave Console Models 259B and 259V

RADIOLA "259B" 1937 BATTERY-OPERATED CONSOLE

RADIOLA "259V" 1937 VIBRATOR-POWERED CONSOLE

Both use 8-inch. permag. loudspeaker.

These models employ the same basic chassis and are readily interchangeable by use of appropriate power supply cable. Note use of tapped 6-volt battery for "vibrator" operation and retention of tapped bias battery.

COMPONENT VALUES

The numbers in parenthesis following component indices are manufacturer's part numbers

RESISTORS

R1. R3. R12-100.000 B2___ 84. , R8---P11 R14. B17--R20-500.000 200,000 ohms, W.; R21 (2762) variable. (3270)—5.4 ohms, w.w.; R51, R52 —50 ohms,

CONDENSERS.

C1. C7-6 mmfd. (F) mica coil trim C2, C3, C8, C10, mica, coil trimmers C10, C22 C23-2 C27 C35 C6 C18 C31-115 C21 1 trimm C33. 34 (J), mic. mfd., C39 mica: C42-0.035 paper: C51

C52, C57-0.02 mfd., paper; 254, C55-0.25 mfd naper COILS. ETC

OILS, E.C. T1, T2 (3402)—B/C. and senectively;T3, T4 (3404)— T5 respectively choke; T53 е; Т54 V.: 7

OPERATING VOLTAGES

following measureme "1.000 ohms per vol otherwise between the sock appearing indicated and chassis. operating under "no signal all controls turned to their clockwise position, except the wave-change which was set as desired in pare the wave-change n, t readings are unaffected by the wave-change switch voltages of the 1K6 and 1D4 were n sured at their source and not at the so contacts of the valves, and the scre ages to all valves except the 1D4 be measured with the ordinary "1,0 per volt" meter, bu sake of completeness

(Continued in col. 2. page 309)

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Code	Part No.	COILS — RECEIVER UNIT	Code	Part No.	RESISTORS — REÇEIVER UNIT	Code	No.	CONDENSERS — RECEIVER UNIT
TI T2 T3 T4 T5 T6 T7 T7	3402 3402 3404 3404 3407 3407 3407 3243 2244	Aerial Coil, 1500-550 K.C. Aerial Coil, 16-50 Metres R.F. Coil, 1500-550 K.C. T.F. Coil, 1500-550 K.C. Osc. Coil, 16-50 Metres First I.F. Transformer, Second I.F. Transformer,	R 18 R R 19 R 20 R 21 R 22 R 23	2762 3270	200,000 ohms, 1 watt 50,000 ohms, 1 watt 500,000 ohms, 1 watt 100,000 ohms, Tone Control 5.4 ohms, wire wound 5,000 ohms, 1 watt	C21 C22 C23 C24 C25 C26 3450 C27		15 mmfd. Mica (C) 2-20 mmfd. Air Trimmer 2-20 mmfd. Air Trimmer 440 mmfd. Mica Padding 2800 mmfd. Padding Variable Condenser .05 mfd. Paper
					RESISTORS — POWER UNIT	C28 C29 C30 C31		8 mfd. 500 Volt Electrolytic .1 mfd. Paper 115 mmfd. Mica (A) 115 mmfd. Mica (A)
ï51 T52 T53 T54	3149 3294 3290 3303	R.F. Choke R.F. Choke Vibrator Transformer, 4V R.F. Choke	R51 R52		50 ohms, 1 watt 50 ohms, 1 watt	C32 C33 C34 C35	1	700 mmfd. Mica 100 mmfd. Mica (G) 100 mmfd. Mica (G) .05 mfd. Paper
T55	3292	Smoothing Choke			CONDENSERS — RECEIVER UNIT	C36 C37 C38 C39		8 mtd. 500V Electrolytic .1 mfd. Paper .5 mfd. Paper 200 mmfd. Mica (J)
	в + ВҚ У	RESISTORS — RECEIVER UNIT 100,000 ohms, 1 watt 75,000 ohms, 1 watt	C1 C2 C3 C4 C5	3450	6 mmfd. Mica (F) 2-20 mmfd. Air Trimmer 2-20 mmfd. Air Trimmer .05 mfd. Paper Variable Condenser	C40 C41 C42 C43		.05 mfd. Paper 2300 mmfd. Mica .035 mfd. Paper .05 mfd. Paper
R3 R 4/346 R5 R6	34 +	100,000 chms, 1 watt + 60,000 chms, 1 watt 50,000 chms, 1 watt 5,000 chms, 1 watt	C6 C7 C8		.I mfd. Paper 6 mmfd. Mica (F) 2-20 mmfd. Air Trimmer			CONDENSERS
R7 44 R8 R10 R11 R12 R13 13600 R14 R15 R16 BR0111 R17 EL	Ben orag He Bun 1507 SUK grow	40,000 ohms, å watt 60,000 ohms, å watt 40,000 ohms, å watt 13 Megohms, å watt 14 Megohms, å watt 100,000 ohms, å watt 500,000 ohms, å watt 500,000 ohms, å watt 14 Megohms, å watt 14 Megohms, å watt 14 Megohms, å watt	C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20	3450	10 mmtd. Mica (B) 2-20 mmtd. Air Trimmer .5 mtd. Paper .5 mtd. Paper Variable Condenser .1 mtd. Paper .05 mtd. Paper 50 mmtd. Mica (A) 115 mmtd. Mica (A) 115 mmtd. Mica (A) 05 mtd. Paper .05 mtd. Paper	C51 C52 C53 C54 C55 C56 C57 C58		.02 mfd. Paper .02 mfd. Paper .1 mfd. Paper .25 mfd. Paper .25 mfd. Paper 8 mfd. 500 V Electrolytic .02 mfd. Paper .5 mfd. Paper

RADIOLAS 2598 AND 259V CIRCUIT DATA

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Radiola Models 259B and 259V

Battery Complement (259B)

Accumulator "A" battery "B" battery "C" battery

2 volts (.78 amps.) 135 volts 41 volts bias

Battery Complement (259V)

Accumulator "A" battery "C" battery

6 volts (1.2 amps.) 4½ volts bias (A) 1500-550 kilocycles (B) 16-50 metres 460 kilocycles

Tuning Ranges

Intermediate Frequency

VALVES AND CIRCUITS.

IC4	R.F. Amplifier
JAN	Detector-Oscillator
IC4	I.F Amplifier
1K6	Detector, A.V.C. and Audio Amplifier
1D4	Output Pentode

SOCKET VOLTAGES.

VALVE	Chassis to Control Grid Volts	Chassis to Screen Grid Volts	Chassis to Plate Volts	Plate Current M.A.	Filament Volts
IC4 R.F. Amplifier	0	*50	135	2.0	2.0
IC6 Detector M.W	0	*45	135	2.0	2.0
S.W	-3	*60	135	2.0
Oscillator M.W.	-'		50	1.5	-
s.w.	- 1	-	90	3.0	-
IC4 I.F. Amplifier	0	*50	135	2.0	2.0
IK6 Detector	*-1.5	*35	*50	0.25	2.0
ID4 Output Pentode	*-4.5	135	130	6.0	2.0
Meásu	red with	no signal	input.	18-75

* Cannot be measured with ordinary voltmeter.

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RADIOLA MODELS " 259B" & " 259V"

1C4, R.F. Amplifier: Plate, 135 v.; screen, 50 v.; grid, zero. Plate current, 2 mA. 1C6, Frequency Converter: Plate, 135 v.; screen, 45 v. (60 v.); grid, zero (-3 v.); osc. anode grid, 50 v. (90 v.). Plate current, 2 mA.

1 C4, 460 kC., I.F. Amplifier: Plate, 135 v.; screen, 50 v.; grid, zero. Plate current, 2 mA.

1K6, Detector, A.V.C. Rectifier, and A.F., Voltage Amplifier: Plate, 50 v.; screen, 35 v.; grid, -1.5 v. Plate current, 0.3 mA. 1D4, Output Pentode: Plate,; 130 v. screen, 135 v.; grid, -4.5 v. Plate current, 6 mA.

"A" battery drain, 0.78 amperes at 2 volts (model 259B), 1.2 amperes at 6 v. (model 259 v.); "B" battery drain, 15 mA. at 135 volts (model 259 B).

ALTERATIONS.

Dial lamps were adopted as from 1/6/'37. Four dial lamps are fitted and these are all illuminated by a push-button switch located on the front of the cabinet. When the pressure is released the dial lamps are turned off, thus conserving battery current. The additions are shown on the diagram.