Search found 10571 matches
- Wed Mar 13, 2024 2:12 pm
- Forum: Beginners
- Topic: Pot Impedance
- Replies: 3
- Views: 1131
Pot Impedance
Just a quick question: I have a high quality, Khozmo shunt stepped attenuator, that cost three figures when I bought it for use in a balanced passive preamp. I'd like to use it with the valve amp rebuild but it is only 10K. Is there any reason not to use it in front of the 6SL7 input stage of the va...
- Tue Mar 12, 2024 8:29 pm
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 193
- Views: 43429
Re: OK…so I’m on wi’ summat
Cheers Simon, Output transformers are now mounted. Took me all day. Not as fast as I was, but it’s not about speed or urgency; not these days. IMG_0375.jpeg Valve sockets will go in tomorrow along with the input sockets and speaker outlets. Rest of the infrastructure (tagstrips, busbar etc) on Thurs...
- Mon Mar 11, 2024 9:09 pm
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 193
- Views: 43429
Re: OK…so I’m on wi’ summat
Inside so far:
Brass bars held by M5 bolts keep the caps in place and rectifier socket hole has been punched.- Mon Mar 11, 2024 5:39 pm
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 193
- Views: 43429
Re: OK…so I’m on wi’ summat
A little more progress:
Caps, power transformer and choke mounted. Output transformers tomorrow. - Sun Mar 10, 2024 9:14 pm
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 193
- Views: 43429
Re: OK…so I’m on wi’ summat
…We’re both rising from the ashes… Definitely Paul. It’s the making and the metalwork, planning the layout, dressing the leads inside, whilst trying to take care not to create unnecessary stray capacitance that I like. My head is only just starting to get around designing the circuits themselves ag...
- Sun Mar 10, 2024 7:37 pm
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 193
- Views: 43429
Re: OK…so I’m on wi’ summat
The NVA based solid state amp is currently doing sterling service in place of the valve amp. That’s the great thing about hi-fi; you always get 2 improvements. The first one came when I replaced the NVA based amp with the valve amp, the second, when I replaced the valve amp with the NVA based amp. I...
- Sun Mar 10, 2024 6:30 pm
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 193
- Views: 43429
Re: OK…so I’m on wi’ summat
A bit of progress on the chassis today:
- Sun Mar 10, 2024 6:21 pm
- Forum: Everyones Projects
- Topic: 6550 SE Amplifier
- Replies: 110
- Views: 10747
Re: 6550 SE Amplifier
Excellent stuff!
- Sat Mar 09, 2024 1:53 pm
- Forum: Everyones Projects
- Topic: 6550 SE Amplifier
- Replies: 110
- Views: 10747
Re: 6550 SE Amplifier
Seconded
- Sat Mar 09, 2024 1:23 pm
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 193
- Views: 43429
Re: OK…so I’m on wi’ summat
Yes, as Phil said, it’ll only work harden if repeatedly bent backwards and forwards, then it’ll snap.
- Sat Mar 09, 2024 10:16 am
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 193
- Views: 43429
Re: OK…so I’m on wi’ summat
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.
- Fri Mar 08, 2024 10:37 pm
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 193
- Views: 43429
Re: OK…so I’m on wi’ summat
I'm no metalbasher Steve, how did you get such a nice corner and straight side at the front? I use a thick chopping board with a machined straight, flat edge. Place the metal sheet on the edge of the kitchen worktop, then place the board on top of the metal to be bent and line it all up with the lo...
- Fri Mar 08, 2024 9:55 pm
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 193
- Views: 43429
Re: OK…so I’m on wi’ summat
It's not cheap, but I think it's worth using.
https://www.wickes.co.uk/Wickes-Metal-P ... m/p/116725
https://www.wickes.co.uk/Wickes-Metal-P ... m/p/116725
- Fri Mar 08, 2024 6:47 pm
- Forum: Everyones Projects
- Topic: OK…so I’m on wi’ summat
- Replies: 193
- Views: 43429
Re: OK…so I’m on wi’ summat
Right then! Mk2 is stepping tentatively off the drawing board: IMG_0366.jpeg Holey aluminium has been bent into shape, giving more front to back chassis depth than the mk1, which means… IMG_0367.jpeg I can bring these three big buggers out of retirement. It will have a choke-input power supply off a...
- Fri Mar 08, 2024 6:39 pm
- Forum: Everyones Projects
- Topic: 6550 SE Amplifier
- Replies: 110
- Views: 10747
Re: 6550 SE Amplifier
Certainly sounded kick-ass on that video.