As usual, the last few days I've been down a different rabbit hole...
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- Fri Mar 15, 2024 8:30 pm
- Forum: Solid State
- Topic: Germanium Amplifier
- Replies: 162
- Views: 83000
- Fri Mar 15, 2024 8:29 pm
- Forum: Solid State
- Topic: Germanium Amplifier
- Replies: 162
- Views: 83000
Re: Germanium Amplifier
Just a couple of thought, you are never going to be able to use much in the way of negative feedback in that amp (at least by comparison with a modern direct coupled circuit. That interstage is going to add so much group delay and general phase shifting nastyness that the most you can manage is PP ...
- Fri Mar 15, 2024 8:19 pm
- Forum: Solid State
- Topic: Germanium Amplifier
- Replies: 162
- Views: 83000
Re: Germanium Amplifier
And these are ex-RAF military ones, so even swankier.andrew Ivimey wrote: ↑Sat Mar 09, 2024 7:32 am PNP oc35s ( never heard of them) I always thought oc28s were the swanky ones!
I'd like to hear them.
- Fri Mar 15, 2024 8:12 pm
- Forum: Beginners
- Topic: Pot Impedance
- Replies: 3
- Views: 1155
Re: Pot Impedance
I concur with Nick.
I even use 100k pots on transistor amp front-ends (with large value bias resistors for the first stage) just in case the source clutches its pearl necklace and faints if presented with anything much lower
I even use 100k pots on transistor amp front-ends (with large value bias resistors for the first stage) just in case the source clutches its pearl necklace and faints if presented with anything much lower
- Fri Mar 15, 2024 8:03 pm
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 193
- Views: 43599
Re: OK…so I’m on wi’ summat
Nice Steve. Does aluminium work-harden at all or can it be bent "in one"? It does work harden so you probably have only the one chance to get it right. Steel is more forgiving but harder to get moving in the first place. Copper would be a brilliant option for bending. My experience has be...
- Fri Mar 15, 2024 7:56 pm
- Forum: Everyones Projects
- Topic: 6550 SE Amplifier
- Replies: 110
- Views: 10836
Re: 6550 SE Amplifier
I always assume a unexpected short term power outage could happen, so I either make sure that the startup control is automatic, or not needed. I had exactly one of these yesterday - Western Power have been 'fiddling about' with the underground network over the road for weeks, but this was the first...
- Sat Mar 09, 2024 2:17 am
- Forum: Solid State
- Topic: Germanium Amplifier
- Replies: 162
- Views: 83000
Germanium Amp Revisited
Germanium Amp Revisited This below ... wow it's now 12 years old! 12 years ago I made this... - Germanium Amp 2024-01.jpg - It's been to Owston a couple of times and got at least one or two favourable comments as I remember. However it always had a few issues. I was looking at it again recently (for...
- Sat Mar 09, 2024 1:36 am
- Forum: Everyones Projects
- Topic: On My Bench.
- Replies: 93
- Views: 31169
Re: On My Bench.
Re the PSU, wow what a story.
- Sat Mar 09, 2024 1:21 am
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 193
- Views: 43599
Re: OK…so I’m on wi’ summat
I like it!
- Fri Mar 01, 2024 11:58 pm
- Forum: Assorted Stuff
- Topic: Nothing In Particular
- Replies: 16488
- Views: 4838695
Re: Nothing In Particular
It's giving me lots of pies to scoff, if that's what you mean.
- Thu Feb 29, 2024 8:55 pm
- Forum: Everyones Projects
- Topic: On My Bench.
- Replies: 93
- Views: 31169
- Thu Feb 29, 2024 8:51 pm
- Forum: Assorted Stuff
- Topic: Nothing In Particular
- Replies: 16488
- Views: 4838695
Re: Nothing In Particular
Had another go at making Polish potato pierogies, this time with Twarog cheese. However despite more salt and spices (garam massala and half a Korean pot noodle spice sachet), the filling is still quite overwhelmed by the flavour of the pastry. Needs more work?
- Tue Feb 27, 2024 10:45 pm
- Forum: Everyones Projects
- Topic: On My Bench.
- Replies: 93
- Views: 31169
- Sat Feb 24, 2024 6:09 pm
- Forum: Assorted Stuff
- Topic: Nothing In Particular
- Replies: 16488
- Views: 4838695
Re: Nothing In Particular
Interesting. Also the adverts are stoked right up!
- Sat Feb 24, 2024 6:05 pm
- Forum: Everyones Projects
- Topic: 6550 SE Amplifier
- Replies: 110
- Views: 10836
Re: 6550 SE Amplifier
Coolio.