American Bosch 29 Schematic

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Product Information:
Model:29
Manufacturer:American Bosch (United American Bosch & Fred M. Link)

Schematics Content:

Page 1:

American Bosch Magneto Corp.

Model 28-29 AC
Schematic Wiring Diagram
25 - Grid Leak 3 megaohms
26 - Grid condenser .00025 mfd.
27 - Plate Resistor 50,000 ohms
32 - External Cond. .00015 mfd.
36 - By-Pass Condensers .5 mfd.
37 - By-Pass Condenser 1. mfd.
38 - By-Pass Condenser 1. mfd.
43 - By-Pass Condenser .002 mfd.
87 - Volume Control 500,000 ohms
102 - Filter Condenser 2 mfd.
103 - Filter Condenser 4 mfd.
107 - Bias Resistor 1500 ohms
110 - Bias Resistor 300 ohms
111 - "B" Resistor 5,000 ohms

Model 28 - 29
Revised Wiring Diagram

American Bosh Model 29
Line Voltage 115 - 115 Volt Tap

American Bosh Model 28
Line Voltage 115 - 115 Volt Tap

Page 2:

AMERICAN BOSCH MAGNETO CORP.

Dynamic Power Pack M
Model 29

Page 3:

AMERICAN BOSCH MAGNETO CORP.

Bottom View of Model 29 Dynamic Power Pack (Also Model 825)

Filament Voltage 7 - 7.5 volts
Plate Voltage 375 - 425 volts
Grid Voltage 30 - 35 volts

131. Dynamic Speaker
132. Input Transformer
133. Power Transformer
134. Condenser Can
135. Base Plate
136. Rectifier Socket
137. Rectifier Socket
138. Power Tube Socket
139. Voltage Switch
140. Attachment Cord
141. Power Cable
142. Cable Connector Socket
143. Power Transformer Primary
144, 2.2 Volt Winding
145. 1.5 Volt Winding
146. 7.5 Volt Winding
147. Rectifier Filament Winding
148. Rectifier Plate Winding
149. Filter Condenser 4. mfd.
150. Filter Condenser 2. mfd.
151. Center Tap Resistor (2.2)
152. Center Tap Resistor (1.5)
153. Center Tap Resistor (7.5)
154. "C" Bias Resistor (2.2 and 1.5) 500
155. "C" Bias Resistor (7.5) 2,000
156. Plate Resistor 10,000 ohms
157. Plate Resistor 10,000 ohms
158. Dial Lamp
159. Main Switch
160. Terminal Strip
161. "C' Resistor By-Pass Condenser 1. mfd.
162. Buffer Condensers .1 mfd.
163. Speaker Filter
164. Terminal Lug
165. Terminal Lug
166. Terminal Lug
167. Terminal Lug
168. Terminal Lug
169. Terminal Lug

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