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1 watt transistor amplifier for electric guitar, Radio Plans, January 1967 🇫🇷
Posted: 06 Jan 2023, 14:19
by modman
The article is missing a page -- that did not get scanned. The schematic and layouts are readable, however.
using SFT571, SFT525, SFT377, SFT367
PDF:
Re: 1 watt transistor amplifier for electric guitar, Radio Plans, January 1967 🇫🇷
Posted: 06 Jan 2023, 17:57
by Axldeziak
Here's some info I found on the transistors:
SFT571 Ge NPN
max collector power in watts - 0.150
max collector power in amps - 0.050
MAX VOLTAGE C-E IN VOLTS - 24
Cut-off FREQUENCY in mhz - 60
GAIN CURRENT - 250
Pc 0.150 W
Ic 0.050 A
Vco max 24V
Gain 60 to 250
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SFT 377 Ge NPN
Maximum Collector Power Dissipation (Pc): 0.25 W
Maximum Collector-Base Voltage |Vcb|: 16 V
Maximum Collector-Emitter Voltage |Vce|: 16 V
Maximum Emitter-Base Voltage |Veb|: 10 V
Maximum Collector Current |Ic max|: 0.6 A
Max. Operating Junction Temperature (Tj): 85 °C
Transition Frequency (ft): 1 MHz
Forward Current Transfer Ratio (hFE), MIN: 50
SFT377 Equivalents = AC127-176-185-186, BSW82, BSX12, NKT734,
2N1308 -1605A-1808-2430-5135
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SFT367 Ge PNP
max collector power in watts - 0.650
max collector power in amps - 1
MAX VOLTAGE C-E IN VOLTS - 32
Cut-off FREQUENCY in mhz - 4
GAIN CURRENT - 250
SFT367 Equivalents = AC117-128-131.152-153-161-192, BSX36, NKT219,
2N1191-1352-1371-1384-1924-4030-5040, 2SB370B
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SFT523 Equivilants = AC128-132, 2N2431
RP231_01-1967_A_REFAIRE Germanium 1W amp.pdf