For those who would like more detail, here is an article: Mosfet Amplifier (EMM Jun 81)
Sure enough, the old Hitachi circuit. A Paul Kemble web page - Hitachi Fet designs. Used in Hitachi amps of the era and also in Perreaux from the mid 80's. Sounds great with a tube pre-amp.
D.
Sure enough, the old Hitachi circuit. A Paul Kemble web page - Hitachi Fet designs. Used in Hitachi amps of the era and also in Perreaux from the mid 80's. Sounds great with a tube pre-amp.
D.
Parts list BOM.
C:\pcbcad720\MAPLINLATMOSFETASORG_4.pls
Reference Value Symbol name
--------- ----- -----------
D 1 * 1N4004
Q 2 ? ALF08N16K
Q 8 * ALF08N16V_L2
Q 7 ? ALF08P16K
Q 9 * ALF08P16V_2
IC 1 B++ CONN1
IC 2 OUTPUT CONN1
IC 3 INPUT+ CONN1
IC 4 GND CONN1
IC 5 B-- CONN1
IC 6 GND CONN1
C 1 100nf C_P2
C 2 6N8 100V C_P2
C 3 100UF 63V C_P2_ELECT
C 4 100NF 250V C_P2
C 5 100pf 100V C_P2
C 6 100pf 100V C_P2
C 7 100pf 63V C_P2
C 8 100UF 63V C_P2_ELECT
C 9 47uf 63v C_P2_ELECT
C 10 100NF C_P2
C 11 10UF 63V C_P2_ELECT
PIN 1 ? HOLE4MM
PIN 2 ? HOLE4MM
PIN 3 ? HOLE4MM
PIN 4 ? HOLE4MM
Q 5 MPSA42
Q 6 MPSA42
Q 1 MPSA92
Q 3 MPSA92
Q 4 MPSA92
R 9 1K PRESET_RS161-9911_416M
R 10 1K PRESET_RS161-9911_416M
R 1 100R R
R 2 100R R
R 3 47R R
R 4 10R 3W R_4W
R 5 12K R
R 6 100R R
R 7 47K R
R 8 390R R
R 11 2K2 R
R 12 33K R
R 13 47K R
R 14 1K R
R 15 220R R
R 16 100R R
R 17 3k9 R
R 18 3k9 R
R 19 100R R
C:\pcbcad720\MAPLINLATMOSFETASORG_4.pls
Reference Value Symbol name
--------- ----- -----------
D 1 * 1N4004
Q 2 ? ALF08N16K
Q 8 * ALF08N16V_L2
Q 7 ? ALF08P16K
Q 9 * ALF08P16V_2
IC 1 B++ CONN1
IC 2 OUTPUT CONN1
IC 3 INPUT+ CONN1
IC 4 GND CONN1
IC 5 B-- CONN1
IC 6 GND CONN1
C 1 100nf C_P2
C 2 6N8 100V C_P2
C 3 100UF 63V C_P2_ELECT
C 4 100NF 250V C_P2
C 5 100pf 100V C_P2
C 6 100pf 100V C_P2
C 7 100pf 63V C_P2
C 8 100UF 63V C_P2_ELECT
C 9 47uf 63v C_P2_ELECT
C 10 100NF C_P2
C 11 10UF 63V C_P2_ELECT
PIN 1 ? HOLE4MM
PIN 2 ? HOLE4MM
PIN 3 ? HOLE4MM
PIN 4 ? HOLE4MM
Q 5 MPSA42
Q 6 MPSA42
Q 1 MPSA92
Q 3 MPSA92
Q 4 MPSA92
R 9 1K PRESET_RS161-9911_416M
R 10 1K PRESET_RS161-9911_416M
R 1 100R R
R 2 100R R
R 3 47R R
R 4 10R 3W R_4W
R 5 12K R
R 6 100R R
R 7 47K R
R 8 390R R
R 11 2K2 R
R 12 33K R
R 13 47K R
R 14 1K R
R 15 220R R
R 16 100R R
R 17 3k9 R
R 18 3k9 R
R 19 100R R
In the link below is to a Maplin lateral mosfet story.
I fixed the noise problems with RC decoupling the front end on my pcb.
Maplin Mosfet amplifier finally noise free! - YouTube
I fixed the noise problems with RC decoupling the front end on my pcb.
Maplin Mosfet amplifier finally noise free! - YouTube
I also added footprints for TO247 and TO3.
Only one or the other can be used and not both at same time.
Only one or the other can be used and not both at same time.
Open to offers on last two modules.
PM me.
p+p is £4.99 UK, £14.99 Europe. £17.99 rest of world.
PM me.
p+p is £4.99 UK, £14.99 Europe. £17.99 rest of world.
PCB for Maplin circuit
Hi
Nigel, I will take the remaining two boards if available.
Pl let me know your paypal address for payment
Cheers!
Ravi
Hi
Nigel, I will take the remaining two boards if available.
Pl let me know your paypal address for payment
Cheers!
Ravi