Hello, I had this oscillator working for months and after replacement of components after OUT2 the oscillator doesn' start anymore.
I did NOT changed things on the circuit as joined!
I scope on OUT0. I measured following:
Knooppunt (=node) A: 1.44V
Knooppunt B: 0.55V
Q1b: 0.88V; coll.8V; e 0.33V; so Q1conducts;
L2: 53µH; L1 14µH (Induction meter not sensitive enough below 20µH but measures as when it oscillated.)
C3 1083 pF (in circuit) (800 out circuit)
C2 100nF
Q1bc: 0,712 (reverse pol. 2.8); Q1be: 0.728 (reverse 2.7)
D1/D2/D3 all between 0.610 and 0.630; reverse 2.8
R1/2/6: values as diagram
over C6: 11K
over C1: 1.5Meg
Voltage over D1: 6.54 V
D2/D3: 0.57
Voltage over R1: 0.318 (sim was 0.255). I lowered the Q1 base voltage to 0.87 as in the sim by putting R 10K over R2: no help.
All grounds are checked.
Changing mutual induction L2-L1 : no help (it helped before this problem).
I would appreciate some help on how to proceed. Thanks.
I did NOT changed things on the circuit as joined!
I scope on OUT0. I measured following:
Knooppunt (=node) A: 1.44V
Knooppunt B: 0.55V
Q1b: 0.88V; coll.8V; e 0.33V; so Q1conducts;
L2: 53µH; L1 14µH (Induction meter not sensitive enough below 20µH but measures as when it oscillated.)
C3 1083 pF (in circuit) (800 out circuit)
C2 100nF
Q1bc: 0,712 (reverse pol. 2.8); Q1be: 0.728 (reverse 2.7)
D1/D2/D3 all between 0.610 and 0.630; reverse 2.8
R1/2/6: values as diagram
over C6: 11K
over C1: 1.5Meg
Voltage over D1: 6.54 V
D2/D3: 0.57
Voltage over R1: 0.318 (sim was 0.255). I lowered the Q1 base voltage to 0.87 as in the sim by putting R 10K over R2: no help.
All grounds are checked.
Changing mutual induction L2-L1 : no help (it helped before this problem).
I would appreciate some help on how to proceed. Thanks.
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