Search found 11266 matches

by Nick
Sat Oct 20, 2018 5:05 pm
Forum: Beginners
Topic: Double rectification and smoothing - Linn LK1/Dirak...
Replies: 1
Views: 29

Re: Double rectification and smoothing - Linn LK1/Dirak...

Yes, I do the same thing in the MDAC power supply I make. The standard MDAC supply is a AC unit, the MDAC itself contains rectifiers and regulators. But if you get the polarity right you can replace the AC with DC, the second rectification just becomes a inline diode and the internal regulation has ...
by Nick
Thu Oct 18, 2018 10:30 am
Forum: Beginners
Topic: Cathode follower buffer
Replies: 8
Views: 99

Re: Cathode follower buffer

I would start with Morgan Jones

https://www.amazon.co.uk/Valve-Amplifie ... 0750656948

Is there any DC on the output you want to put the buffer stage on?
by Nick
Wed Oct 17, 2018 2:10 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 9857
Views: 551166

Re: Nothing In Particular

This'll all be gone soon:
I foresee a problem reaching the upper part of the house...
by Nick
Tue Oct 16, 2018 2:46 pm
Forum: Everyones Projects
Topic: Transcendent Mini Beast Build
Replies: 37
Views: 743

Re: Transcendent Mini Beast Build

Just be aware that potting a transformer will affect its power handling capacity as it will be less able to loose heat.
by Nick
Sat Oct 13, 2018 9:21 am
Forum: Assorted Stuff
Topic: Grounding boxes ?
Replies: 23
Views: 583

Re: Grounding boxes ?

The problem I see with measuring the noise floor and any change is what do you use as a reference?
by Nick
Fri Oct 12, 2018 8:16 pm
Forum: Everyones Projects
Topic: First Watt F4 reduce VDC?
Replies: 9
Views: 180

Re: First Watt F4 reduce VDC?

Just what rating is going to be over? Vds for irfp(9)240 is 200v
by Nick
Fri Oct 12, 2018 6:44 pm
Forum: Everyones Projects
Topic: First Watt F4 reduce VDC?
Replies: 9
Views: 180

Re: First Watt F4 reduce VDC?

I would just get a 18v TX.
by Nick
Fri Oct 12, 2018 12:24 pm
Forum: Assorted Stuff
Topic: Grounding boxes ?
Replies: 23
Views: 583

Re: Grounding boxes ?

Where is it stated that a ground must physically be connected to anything? It's just a circuit reference point. Yes, its necessary to separate how we think about the signal ground from the earth safety ground. They are not always the same thing. But in every case I can think of (other than one that...
by Nick
Thu Oct 11, 2018 12:06 am
Forum: Assorted Stuff
Topic: Grounding boxes ?
Replies: 23
Views: 583

Re: Grounding boxes ?

Dave sells them, so I should try one sometime.
by Nick
Thu Oct 11, 2018 12:04 am
Forum: Assorted Stuff
Topic: Grounding boxes ?
Replies: 23
Views: 583

Re: Grounding boxes ?

No, I have no idea what they do. I have considered the idea (but never tried it) of a "active ground". Use a DC coupled power amp with its input referenced to earth with low pass filtering to give a clean ground referenced input, the use the output of the amp to provide the signal ground to the syst...
by Nick
Sun Oct 07, 2018 6:42 pm
Forum: Assorted Stuff
Topic: Computer security issue. Should we be worried?
Replies: 6
Views: 159

Re: Computer security issue. Should we be worried?

Yes and no I would say (not that that helps much). Generally, I don't think there is anything for us to worry about as there is nothing we can do about it. Unless of course you are in charge of a server farm, then its a worry, There are politics of course involved as well, as this is a good reason t...
by Nick
Fri Sep 28, 2018 10:22 pm
Forum: Everyones Projects
Topic: PCL86 SE Ultralinear Monos
Replies: 47
Views: 1595

Re: PCL86 SE Ultralinear Monos

There are both magnetic and non magnetic stainless

https://www.bssa.org.uk/faq.php?id=24
by Nick
Wed Sep 19, 2018 12:03 am
Forum: Beginners
Topic: information needed about low power amp topology
Replies: 22
Views: 844

Re: information needed about low power amp topology

I think the point is these circuits are from the time when transistors cost more than transformers and the gaal was a hand held radio that could be powered by two 1.5v cells. Values here http://www.spontaflex.free-online.co.uk/slidingjunior/page2.jpg Other circuits here http://www.spontaflex.free-on...
by Nick
Tue Sep 18, 2018 5:26 pm
Forum: Your Fave Artists
Topic: What Are You Listening To Right This Minute?
Replies: 2887
Views: 160752

Re: What Are You Listening To Right This Minute?

Dave the bass wrote:
Mon Sep 17, 2018 9:21 pm
Ha! I knew that'd wake you up Popz :)
Meanwhile in equally odd news

"Hawkwind announce orchestral album 'Road To Utopia' featuring Eric Clapton"

https://www.planetrock.com/news/rock-ne ... c-clapton/
by Nick
Mon Sep 17, 2018 1:36 pm
Forum: Beginners
Topic: information needed about low power amp topology
Replies: 22
Views: 844

Re: information needed about low power amp topology

Ami wrote:
Mon Sep 17, 2018 12:01 pm
Thanks Nick. I've a lot to learn :P

Luv, Ami.
Yep, thats whats good about this stuff.