Search found 20154 matches
- Fri Mar 29, 2024 9:57 pm
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 156
- Views: 33086
Re: OK…so I’m on wi’ summat
Been a bit of a saga - I was just going to mention, but you changed it - the fading away thumping noise on switch off suggests low frequency oscillation. But not sure how. Could have been the PSU doing weird things, and amplified by the o/p stages. Just guessing.
- Fri Mar 29, 2024 9:52 pm
- Forum: Assorted Stuff
- Topic: Nothing In Particular
- Replies: 16446
- Views: 4674498
- Fri Mar 29, 2024 9:50 pm
- Forum: Assorted Stuff
- Topic: The Audio-Talk Motorcycling thread.
- Replies: 1455
- Views: 579597
Re: The Audio-Talk Motorcycling thread.
You noticed!
Actually it was a couple of days ago, I'm only writing it up now.
Actually it was a couple of days ago, I'm only writing it up now.
- Fri Mar 29, 2024 9:39 pm
- Forum: Assorted Stuff
- Topic: The Audio-Talk Motorcycling thread.
- Replies: 1455
- Views: 579597
Re: The Audio-Talk Motorcycling thread.
The stator pole ends are pretty beat up, and the inside of the rotor has score marks. Going by my previous experience with my old D3, this indicates that the left crank main bearing had 'collapsed', allowing the crank end to 'whip', which in turn allowed the rotor and stator to come into contact. Bu...
- Fri Mar 29, 2024 9:29 pm
- Forum: Assorted Stuff
- Topic: The Audio-Talk Motorcycling thread.
- Replies: 1455
- Views: 579597
Re: The Audio-Talk Motorcycling thread.
I have flitted like a butterfly onto Bantam stuff, if possibly briefly... Decided it would be easier to start working on the engine in the conservatory, the shed is too cramped, too dark, too cold in winter and too hot in summer (mind you the two latter are also true of the conservatory, but it wins...
- Fri Mar 29, 2024 8:31 pm
- Forum: Assorted Stuff
- Topic: Nothing In Particular
- Replies: 16446
- Views: 4674498
Re: Nothing In Particular
Only just seen this, very sorry Phil.
- Thu Mar 21, 2024 9:04 pm
- Forum: News
- Topic: Steve Harley death: Cockney Rebel singer dies at 73
- Replies: 1
- Views: 380
Re: Steve Harley death: Cockney Rebel singer dies at 73
Only just seen this, damn.
- Sat Mar 16, 2024 10:08 pm
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 156
- Views: 33086
Re: OK…so I’m on wi’ summat
Absolutely fab.
- Sat Mar 16, 2024 10:04 pm
- Forum: Solid State
- Topic: Germanium Amplifier
- Replies: 162
- Views: 81146
Re: Germanium Amplifier
With improved output transistor biasing - originally thermistors were added for safety, they basically went across the transformer secondaries, because the DC resistances of same formed part of the resistor divider that biases each o/p transistor, as per the Burns-Orbit. The original thermistors are...
- Sat Mar 16, 2024 8:06 pm
- Forum: Assorted Stuff
- Topic: Owston 2024?
- Replies: 2
- Views: 311
Re: Owston 2024?
I am also interested. Almost guaranteed MCRU would be as well.
- Sat Mar 16, 2024 8:04 pm
- Forum: Assorted Stuff
- Topic: General health matters.
- Replies: 784
- Views: 191378
Re: General health matters.
Ah the pressure tester thing! It is impossible not to blink.
- Sat Mar 16, 2024 3:36 pm
- Forum: Solid State
- Topic: Germanium Amplifier
- Replies: 162
- Views: 81146
Re: Germanium Amplifier
First 30 seconds of a WAV file - Life Is A Long Song by Jethro Tull..... :D - Germanium amp 2024-C4-wav.png - I had the EP of this when it first came out, so 1971-ish, ad often used it as a 'test signal' for whatever I was building at the time. Not an ideal choice to be honest, and caused a bit of h...
- Sat Mar 16, 2024 3:29 pm
- Forum: Solid State
- Topic: Germanium Amplifier
- Replies: 162
- Views: 81146
Re: Germanium Amplifier
Frequency sweep, checks out OK...
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Noise plot, it is what it is...
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Clipping with 2V peak input. No unexpected behaviour...
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Noise plot, it is what it is...
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Clipping with 2V peak input. No unexpected behaviour...
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- Sat Mar 16, 2024 3:25 pm
- Forum: Solid State
- Topic: Germanium Amplifier
- Replies: 162
- Views: 81146
Re: Germanium Amplifier
Alright, so then I found this fabulous thing - it's another one from the school exercise book... this is Fig 10.38 from the original library book... - Fig1028.jpg - They are taking the NFB back to the driver stage emitter, so I tried that... first I did what you suggested, take it back to base, that...
- Sat Mar 16, 2024 3:13 pm
- Forum: Solid State
- Topic: Germanium Amplifier
- Replies: 162
- Views: 81146
Re: Germanium Amplifier
Definitely got that going on hasn't it? This is a bit too new, let's go with what we know ...