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Field Coil Wild Burro

Posted 11th November 2011 at 07:33 PM by DougL

http://www.diyaudio.com/forums/wild-...eld-coils.html

I had hoped that this might happen some day.
I will be watching this
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Old

a text

Posted 30th October 2011 at 08:09 PM by tomtt
Updated 29th January 2012 at 05:29 AM by tomtt



The perception of the higher order annoyance may be biological or cultural,
as not all musical instruments are made the same.


- a diyaudio forum member

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
My only advantage as a reporter is that i am so physically small,
so temperamentally unobtrusive,
and so neurotically inarticulate that people tend to forget that my presence runs counter to their
best interest

- joan didion


Click the image to open in full size.

~~~~~~~~~~~~~~~~~


i should be frustrated but i can't seem to stop thinking about beautiful things .

- john mayer

~~~~~~~~~~~~~~~~


Click the image to open in full size.


''Closest thing to dying that I know of,''
Ali
...
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Old

rolling your own (an adventure in coil winding) part II

Posted 28th October 2011 at 08:13 AM by wintermute (Wintermutes Rantings)

OK so I've been a bit slack getting to the second instalment. I actually finished the last coil about three weeks ago and have made the crossovers.

Tip number 1. Wear Gloves!! After the first coil my fingers were killing me. I'd pulled back the skin on my fingertips so hard that it was coming away from under the fingernails. Ouch!!! The gloves I subsequently wore were just normal rubber dish washing gloves. These worked quite well because they allowed me to put tension on the wire (holding the spool) and I no longer got sore fingers

Tip number 2. If you can make the same value with different size formers, choose the one with the lesser turns per layer. My pancake coils were much easier to make than the taller ones.

I think that the reason for tip 2 is that the more turns per layer, the more chance that small kinks in the winding wire will add up to enough to make it hard to get the last turn on for any particular layer. The coils...
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Old

A man with cojones...

Posted 27th October 2011 at 08:33 AM by abraxalito
Updated 5th March 2012 at 02:49 AM by abraxalito

How often are you likely to read the words 'Jobs eventually relented' ? Read and weep Intel; Tony Fadell: respect.

Steve Jobs Wanted Intel Chips for the iPad - Digits - WSJ
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Old

Super Regulator PCB's for free

Posted 22nd October 2011 at 12:14 PM by peranders
Updated 27th December 2011 at 04:31 PM by peranders

diyaudio.com is a good place and this is my effort to raise money for the service.

Click the image to open in full size.

I'm offering free pcb's of my Sjöström Super Regulator SSR01 to all donating diyaudio members. You will get this without any charge except for worldwide shipping 33 SEK (5 USD, 3,6 EUR)

Contact me via email from diyaudio (this is important) since then I can easily see that your are a member and I can also check if you have donated (the star in your profile). If you don't have donated yet, here is the link:
diyAudio - Donations

Shipping is paid via Paypal but you can also use credit card if you don't have an account at Paypal. I will also use the Paypal address as the shipping address if you don't say anything else.

Fine measurements by jackinnj http://www.diyaudio.com/forums/power...ml#post2132153 Do you...
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Old

ml cls one plytron transformer (75-1) or accoustat twin transformer mod

Posted 12th October 2011 at 05:21 AM by teslaboy

hi
I collect esl speakers and mod some.
I have both ML CLS 1`s and cls 2Z speakers.
i would like to mod both speakers.
I would like to use my plytron 75-1 esl transformers
instead of the stock transformer.(CLS-1) should i
start from scratch or use the ML original eq with modifications. Also on the ML CLS2 i want to use
one original transformer for bass and a toroid for the highs like the acoustat MK 121 interface.
Should i use the same values as acoustat or use
other values. I value any ideas the community may
have, I have followed Calvin for many years and would like to thank him for his inspiration.
thanks
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Old

What's in a datasheet?

Posted 7th October 2011 at 05:38 AM by abraxalito
Updated 14th November 2012 at 01:47 AM by abraxalito (Updated with link to new article 14th Nov 2012)

Yesterday I had this very interesting exchange with RocketScientist about his open source design for a headphone amp, the O2.

http://www.diyaudio.com/forums/headp...ml#post2736266

The nub of the issue raised here is - should designers stick only to what datasheets tell them about parts or to what extent use what's 'common knowledge' about parts to eek out better performance?

I was surprised to learn from RS that offsets within dual opamps are so closely matched in practice - its a really new discovery for me. So why don't semiconductor manufacturers tout this feature? Or perhaps RS just 'got lucky' with the relatively few samples he tested?

My experience of reading opamp datasheets is that the specs for offsets (both the typicals and the max) degrade in going from single to dual devices, where the devices are all on one die. Let's have a look at a relevant opamp from...
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Old

Dahlquist LP1

Posted 5th October 2011 at 02:29 PM by soundalot

What op amps can replace the 4558 in the Dahlquist LP1 crossover?
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Old

amb a10 preamp, s10 power supply

Posted 5th October 2011 at 12:32 PM by jtktam (Newbie audio DIYer)

After multiple digikey and mouser packages, after one big amb package.. i have started my new winter project.

the alpha 10 preamp.. basically it's a backplane board for all the different amb projects. it ties up all the different pcb together into a preamp.

the pictures of a wire free chassis was what sold me on this idea. and the fact that I can replace each module if and when they get upgraded is great.

i think that this is something others can "copy" .. make a generic backplane that you can plug different modules into to make amps, etc

-joe
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Old

Maelstrom-project

Posted 27th September 2011 at 06:35 PM by Taskinen

So this project would contain Maelstrom 21" Subwoofer and Hypex DS 8.0 amp.

Attachment 498

Here is a model, size would be about 700 tall with wooden legs, 650 mm depth and 1300 mm wide.

Attachment 499

Idea with this is to do a band-bass box with t-line structure. The closed chamber would be around 150 liters and reflex chamber little over 200 with the space that t-line takes from it. Size of the square reflexport would be 100x300 mm and about 2,5 meters long (about 8 feet) and tone is around 13-14 Hz.

This is basically designed for watching movies and stuff, cutout will be probably around 30-35 hertz.

What do you guys think about this?
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