10-12-2013, 09:42 PM
A bit of progress today.
I tested the oscillator coils with these results:-
L6 = 0.7Ω
L7 = 2.4Ω
L8 = 0.4Ω
which seemed reasonable.
R2 was up to 125kΩ so I changed that. Robert must be having an influence on me as I re-stuffed the old one.
Still neither wave-band worked so I thought it time to see what TR1 was really like.
The original has a β of 37. I'd got another but this only tested at 36. I'd also found an OC45 with a β of 94 so put that in with no effect.
I decided it was time to put the test gear away and have a good look at it. I found that I'd replaced C8 incorrectly; I'd had to shift it out of the way to get at R4.
Correcting that got Medium Wave going again so at least I'm back to just seeking LW.
We'll see what tomorrow brings.
- Joe
I tested the oscillator coils with these results:-
L6 = 0.7Ω
L7 = 2.4Ω
L8 = 0.4Ω
which seemed reasonable.
R2 was up to 125kΩ so I changed that. Robert must be having an influence on me as I re-stuffed the old one.
Still neither wave-band worked so I thought it time to see what TR1 was really like.
The original has a β of 37. I'd got another but this only tested at 36. I'd also found an OC45 with a β of 94 so put that in with no effect.
I decided it was time to put the test gear away and have a good look at it. I found that I'd replaced C8 incorrectly; I'd had to shift it out of the way to get at R4.
Correcting that got Medium Wave going again so at least I'm back to just seeking LW.
We'll see what tomorrow brings.
- Joe
