Search found 1101 matches

by izzy wizzy
Thu Jul 09, 2020 11:59 am
Forum: Valves
Topic: Another insane valve for phonos
Replies: 6
Views: 169

Re: Another insane valve for phonos

I'm with you on the headroom thing. The 6F12P looks interesting. I'd want to try it as pentode EQ triode so "cheap" all in one phono but I'd need pentode spice netlist to sim. I see so far Ale only has it for triode. Not keen as very high input capacitance which I've moved away from. Must post my "w...
by izzy wizzy
Thu Jul 09, 2020 10:41 am
Forum: Assorted Stuff
Topic: Tesla.
Replies: 91
Views: 1333

Re: Tesla.

steve s wrote:
Thu Jul 09, 2020 10:34 am
but theres no money in selling water
That's another business that needs to stop along with burning things as it is huge business and a massive polluter.
by izzy wizzy
Thu Jul 09, 2020 10:39 am
Forum: Assorted Stuff
Topic: Tesla.
Replies: 91
Views: 1333

Re: Tesla.

I understand the boiler industry trying to get an alternative to natural gas going but whatever why you look at it, burhing things to heat something else is inefficient. Sure there's all that investment in infrastructure that is already there but it's not really up to the job for hydrogen. IMHO, the...
by izzy wizzy
Thu Jul 09, 2020 9:25 am
Forum: Valves
Topic: Another insane valve for phonos
Replies: 6
Views: 169

Re: Another insane valve for phonos

I've been very interested in shunt phono EQ for a while. The overload thing you refer to seemed to be an issue for dhtrob but he says he fixed it but not how. I remember on intact when discussing dave's shunt phono that Stephie mentioned there could be overload issues with such a design in the HF. L...
by izzy wizzy
Wed Jul 08, 2020 9:09 am
Forum: Everyones Projects
Topic: Dual EDS 1000 and airprodigy linear arm build
Replies: 78
Views: 1736

Re: Dual EDS 1000 and airprodigy linear arm build

It's times like this that reinforces your belief/choice in vinyl but it's also amazing there's still mileage in such an old medium of a rock in a groove so long after its "demise".
by izzy wizzy
Tue Jul 07, 2020 10:23 am
Forum: Beginners
Topic: Blackgate Caps
Replies: 22
Views: 242

Re: Blackgate Caps

Im sure black gates make a difference in the right circumstances, but all my amps sound better once they have been on a while with or without them. Right circumstances is important. I had one place where I couldn't tell the difference reliably between a Wkz and a BHC electro. Certainly wouldn't pay...
by izzy wizzy
Tue Jul 07, 2020 8:54 am
Forum: Beginners
Topic: Blackgate Caps
Replies: 22
Views: 242

Re: Blackgate Caps

A common criticism of the BGs is that they're not good for ages if you turn them off. Not saying that isn't true but it's not something I've been aware of and the phono uses only BGs in the HT. Certainly be nice to know of an alternative. The only thing I ever compared them to was ansar pp 22u for H...
by izzy wizzy
Sun Jul 05, 2020 12:39 pm
Forum: Everyones Projects
Topic: GM70 PP
Replies: 159
Views: 18976

Re: GM70 PP

Spose there's a few ways of looking at the life. The DIYAudio post does look short life (it's in the data sheet) but there were some things to take from it. He is running them quite hard and being conservative on replacement not wanting to take a risk. But yes compared to others, it's relatively sho...
by izzy wizzy
Sat Jul 04, 2020 6:51 pm
Forum: Everyones Projects
Topic: GM70 PP
Replies: 159
Views: 18976

Re: GM70 PP

I realise this next question is like "how long is a piece of string" but ... How long lasting are GM70s? Do they have decent life, long life or short life relative to expectations. Not sure how to phrase this properly. All valves will have a shorter life if thrashed; obvs. I'm running them about 80%...
by izzy wizzy
Fri Jul 03, 2020 12:40 pm
Forum: Beginners
Topic: dc-dc converters
Replies: 11
Views: 562

Re: dc-dc converters

Nick wrote:
Fri Jul 03, 2020 12:27 pm
Maybe Foldback limiting?
Yes that, as well as constant current limiting as well as the thing I couldn't remember which was hiccup current limiting.
by izzy wizzy
Fri Jul 03, 2020 12:32 pm
Forum: Beginners
Topic: dc-dc converters
Replies: 11
Views: 562

Re: dc-dc converters

This is the Murata stuff I mentioned

https://www.murata.com/en-eu/products/e ... asic#part1
by izzy wizzy
Fri Jul 03, 2020 10:26 am
Forum: Beginners
Topic: dc-dc converters
Replies: 11
Views: 562

Re: dc-dc converters

No ideas.. but in may I bought some 2 amp adjustable dc to DC converters. Did not work on the mofo, but great as a fan controller with light currents I since bought a couple of 5 amp boards to see how they fare, but I'm a few weeks off trying those Ed. Many SMPS don't like surge currents, shut down...
by izzy wizzy
Fri Jul 03, 2020 10:21 am
Forum: Beginners
Topic: dc-dc converters
Replies: 11
Views: 562

Re: dc-dc converters

I don't have an answer for you other than something I looked at when I was concerned about the HF artifacts coming out of my SMPS. Murata have application notes on suppression of diff and common mode noise which might be useful. I chose to ignore the problem as I couldn't quantify it with the equipm...
by izzy wizzy
Tue Jun 30, 2020 4:42 pm
Forum: Everyones Projects
Topic: The Nemesis 813 PP Amplifier
Replies: 362
Views: 44986

Re: The Nemesis 813 PP Amplifier

I always admired the simplicity of your 813 ever since I saw it on Lynn's site - at the time I was building with the same topology using 6N6P and 2A3's - yours seemed brave and epic using 813s! Thanks but check this from Ian who built an amazing amplifier based on that design https://izzy-wizzy.com...
by izzy wizzy
Tue Jun 30, 2020 1:57 pm
Forum: Everyones Projects
Topic: The Nemesis 813 PP Amplifier
Replies: 362
Views: 44986

Re: The Nemesis 813 PP Amplifier

Not an iron butterfly but thought I'd post the final circuit before it went GM70

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Link to my Audio Website https://izzy-wizzy.com/?page_id=361