Search found 752 matches

by izzy wizzy
Thu May 23, 2019 9:18 am
Forum: Assorted Stuff
Topic: Owston '19 what are you bringing
Replies: 114
Views: 2007

Re: Owston '19 what are you bringing

Just a thought - anyone interested in headphones? I've got a couple of sets of Shure cans (SRH840 and 1440) which I'm happy to bring. I don't have a headphone amp though. Chris The line stage I'm bringing was meant to be a headphone amp for starters. It has an AVC on the output so probably can driv...
by izzy wizzy
Wed May 22, 2019 8:17 am
Forum: Everyones Projects
Topic: The Nemesis 813 PP Amplifier
Replies: 309
Views: 10709

Re: The Nemesis 813 PP Amplifier

The power feed to the first stage has been giving me a rising concern. If anything went wrong or I forgot to put the valves in and so on, HT2 could rise to HT1 and the HT2 decoupler, rated at 400V would go boom. So I've replaced it with 3 x 220u 400V in series so it can now easily take full HT of ab...
by izzy wizzy
Tue May 21, 2019 12:16 pm
Forum: Assorted Stuff
Topic: Owston '19 what are you bringing
Replies: 114
Views: 2007

Re: Owston '19 what are you bringing

jack wrote:
Tue May 21, 2019 11:47 am
Small point! Small speakers get lost in that room, what with a) the room size, and b) all the noisy drunken gits talking all the time...
That's the one thing I should be OK on ;)
by izzy wizzy
Tue May 21, 2019 8:37 am
Forum: Assorted Stuff
Topic: Owston '19 what are you bringing
Replies: 114
Views: 2007

Re: Owston '19 what are you bringing

Would appreciate some advice for a newbie. What is there to put yer stuff on? Should I bring my own table(s)? Are there plenty of power sockets near wherever you set up? Do I need own extension cable? Is it setup and leave it there for the duration or is there a lot of moving stuff about? How long i...
by izzy wizzy
Sun May 19, 2019 6:12 pm
Forum: Everyones Projects
Topic: The Nemesis 813 PP Amplifier
Replies: 309
Views: 10709

Re: The Nemesis 813 PP Amplifier

I started this journey in April 2003. It came about as an amplifier to drive my then Acoustat 1+1s. I had heard an 813 PP amp and wanted something like that myself. It morphed into something very silly and my conclusion was, if that was what I needed to drive the Acoustats, then something was wrong ...
by izzy wizzy
Sun May 19, 2019 5:49 pm
Forum: Everyones Projects
Topic: The Nemesis 813 PP Amplifier
Replies: 309
Views: 10709

Re: The Nemesis 813 PP Amplifier

Latest power supply circuit


IMG_20190519_174244055_compress89.jpg
by izzy wizzy
Sun May 19, 2019 3:05 pm
Forum: Everyones Projects
Topic: The Nemesis 813 PP Amplifier
Replies: 309
Views: 10709

Re: The Nemesis 813 PP Amplifier

Latest audio circuit

IMG_20190519_145950313_compress53.jpg
by izzy wizzy
Sat May 18, 2019 8:08 pm
Forum: Everyones Projects
Topic: The Nemesis 813 PP Amplifier
Replies: 309
Views: 10709

Re: The Nemesis 813 PP Amplifier

Last week I fiddled to try something out and it didn't go well and blew the plug fuse coming up on the variac. Upsetting and a step backwards. Realised it was built so badly I couldn't get to things which was a contributer to the problem. The rebuild for Owston wasn't going to make it so tried an id...
by izzy wizzy
Thu May 16, 2019 4:11 pm
Forum: Everyones Projects
Topic: Niobium - Valve pre for SS Power Amp
Replies: 53
Views: 5005

Re: Niobium - Valve pre for SS Power Amp

While trying to reduce the hum, I am also trying to tidy up the wiring. I have 2 parts to the removal top plate. The front half contains the VR tubes, and the back half the triodes. I am thinking of having some form of links or jumpers on the top, but being exposed needs to be safe (180Vdc) and als...
by izzy wizzy
Wed May 15, 2019 5:47 pm
Forum: Everyones Projects
Topic: Remember These?
Replies: 597
Views: 21419

Re: Remember These?

Mike H wrote:
Wed May 15, 2019 5:23 pm
Just don't fiddle with it 'til you break it. :thumbleft:
I messed around with mine and broke it. Thought I might make it a bit better. Haven't been back in the room since last Friday when it broke. When I can do it, I'll try and put it back to how it was, I hope.

Cheers,
Stephen
by izzy wizzy
Mon May 13, 2019 7:20 pm
Forum: Speakers
Topic: Something stirs in the Undergrowth
Replies: 2395
Views: 302444

Re: Something stirs in the Undergrowth

Initial report from Nick re. Munich 2019 confirmed that the Vox Palladian/Basso did not disappoint. It's a funny old game this. A friend from NZ was over in Germany for business and went to Munich. I mentioned the Vox room being my fave from last year. He'd been the year before that and this and di...
by izzy wizzy
Mon May 13, 2019 8:54 am
Forum: Speakers
Topic: Something stirs in the Undergrowth
Replies: 2395
Views: 302444

Re: Something stirs in the Undergrowth

Nice one.

Just for those at the back of the class whose homework got eaten by the dog, can you summarise what amps go where via whatever crossovers/filters that's all going on there please?

Thanks.
by izzy wizzy
Sun May 12, 2019 4:04 pm
Forum: Everyones Projects
Topic: Remember These?
Replies: 597
Views: 21419

Re: Remember These?

A lot of angry reactions and defense mechanisms showing just because I was making some suggestions based on my own experience with single output tube OTLs. The case in point was:"Well, a week down the line and I’m no nearer, finding anything, although it’s been great fun reacquainting myself with m...
by izzy wizzy
Sun May 12, 2019 1:17 pm
Forum: Everyones Projects
Topic: Remember These?
Replies: 597
Views: 21419

Re: Remember These?

The music I like does not have what most folk would call good sound quality. I’ve spent nearly twenty years trying to put together a system that will do Stax, Motown, Atlantic, Chess stuff justice. I’ve succeeded I think with the current system. It’s either go ahead and show what has been achieved ...
by izzy wizzy
Sun May 12, 2019 10:23 am
Forum: Everyones Projects
Topic: Remember These?
Replies: 597
Views: 21419

Re: Remember These?

OK gotcha. Can be a tricky audience. Go with what you know and don't look them in the eye. Have planned exit strategy :)