Search found 21 matches
- Thu Nov 10, 2022 2:29 pm
- Forum: Everyones Projects
- Topic: Quad 405-2 with added Snook
- Replies: 16
- Views: 9597
Re: Quad 405-2 with added Snook
The PAT sticker comes from its past life as a DJ back up amp. I can give no sane reason for it being left in place
- Thu Nov 10, 2022 2:24 pm
- Forum: Everyones Projects
- Topic: Quad 405-2 with added Snook
- Replies: 16
- Views: 9597
Re: Quad 405-2 with added Snook
Just to be a completist for once here is the outcome. Not perfect but the 405-2 isn't now disgracing itself up on the track. Still the heat sinked brick it ever was, but one that rightly won design awards. The matched paint colour is far closer than the photos suggest. The holes I filled on the back...
- Thu Nov 10, 2022 2:07 pm
- Forum: Everyones Projects
- Topic: Quad 405-2 with added Snook
- Replies: 16
- Views: 9597
- Thu Nov 10, 2022 2:06 pm
- Forum: Everyones Projects
- Topic: Quad 405-2 with added Snook
- Replies: 16
- Views: 9597
- Sat Jan 01, 2022 9:11 pm
- Forum: Assorted Stuff
- Topic: Lenard Audio Institute
- Replies: 6
- Views: 2298
Re: Lenard Audio Institute
....Fair point, Metrology it is. 'With most cone speakers, solid-state amps appear to sound flat and lifeless, the bass and high frequencies appear dead, as if a blanket is put over the speaker. Voltage Current drive comparison Valve amp power is directly proportional to speaker Impedance therefore ...
- Sat Jan 01, 2022 3:41 pm
- Forum: Assorted Stuff
- Topic: Lenard Audio Institute
- Replies: 6
- Views: 2298
Lenard Audio Institute
I've being reading around solid state vs valve today and came across this company/institute/ education resource which has helped to pass time on what is a day simply for passing time - happy new year btw, is that sore head a hangover or the start of another viral episode? I'm a sucker for a strongly...
- Fri Dec 24, 2021 12:59 pm
- Forum: Assorted Stuff
- Topic: Sars-Cov-2 stuff
- Replies: 485
- Views: 128357
Re: Sars-Cov-2 stuff
My daughter has imported the virus from school (teenager, if fatigue has kicked in there's no telling) so we find ourselves creeping around the house in N95 masks. A sentry is posted to repel visitors bearing mince pies and the cat is being monitored. The festive dinner, just the 4 of us, will be fo...
- Fri Oct 08, 2021 10:38 pm
- Forum: Everyones Projects
- Topic: Quad 405-2 with added Snook
- Replies: 16
- Views: 9597
- Fri Oct 08, 2021 10:22 pm
- Forum: Everyones Projects
- Topic: Quad 405-2 with added Snook
- Replies: 16
- Views: 9597
Re: Quad 405-2 with added Snook
The case is pretty tatty and has some holes I'll need to fill in. I can't find a reference to the paint Quad used anywhere so I may spray painting it satin black or another part of me is thinking further investment and getting it powder coated in say orange gloss, as I have no amplifiers in that col...
- Fri Oct 08, 2021 10:15 pm
- Forum: Everyones Projects
- Topic: Quad 405-2 with added Snook
- Replies: 16
- Views: 9597
- Fri Oct 08, 2021 10:14 pm
- Forum: Everyones Projects
- Topic: Quad 405-2 with added Snook
- Replies: 16
- Views: 9597
- Fri Oct 08, 2021 10:12 pm
- Forum: Everyones Projects
- Topic: Quad 405-2 with added Snook
- Replies: 16
- Views: 9597
- Fri Oct 08, 2021 10:10 pm
- Forum: Everyones Projects
- Topic: Quad 405-2 with added Snook
- Replies: 16
- Views: 9597
Quad 405-2 with added Snook
I started on an old battered Quad 405-2 in December last year, so today feel flushed with success as it makes a noise and oscilloscope waves look good. I originally followed Nicks modification description but for reasons I forget, probably related to the position and effect of C8 described in the Ke...
- Sun Jun 20, 2021 2:56 pm
- Forum: Solid State
- Topic: Quad 405-2 circuit query
- Replies: 7
- Views: 9002
Re: Quad 405-2 circuit query
Thanks for the offer to look Nick, I have attached an image from your notes, showing C7 as a resistor. C7 is also a resistor on some of the 405 boards yet all the circuit diagrams i have found show it as a capacitor, a 330pf capacitor. As I say I'm sure both the resistors, C7 R17, need to go, I just...
- Sat Jun 19, 2021 9:38 pm
- Forum: Solid State
- Topic: Quad 405-2 circuit query
- Replies: 7
- Views: 9002
Re: Quad 405-2 circuit query
I will, thanks Dave