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Old 9th May 2007, 09:50 AM   #501
Magura is offline Magura  Denmark
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Well, everything is a bit broad

Are you looking for a recepie to make a pair or just the properties of the ones I have made?

Magura
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Old 9th May 2007, 02:23 PM   #502
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A broad overview and the properties. If you've discovered something of value that you wish to share, please do.
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Old 9th May 2007, 11:25 PM   #503
Magura is offline Magura  Denmark
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Well, I guess there's little new under the sun.

The inductors are wound aiming for a square cross section, made of 1.9mm wire. I have chosen to protect them a bit from scratches and the like by wrapping them in cotton tape prior to impregnating them with polyurethane compound.

The basic specs are: 2*80mH (nominal) at 100Hz they measure approx 2*120mH These numbers are approx. as my sine generator have not been calibrated for ages and I have no way to tell how far it's off.

The DCR is 2.3 ohm

They tip the scales at approx. 20kg.

They are good for at least 20ADC without getting more than luke warm. Most likely they are good for almost 30ADC, but I have no way to test this.

And a pic of the beast in question:

http://www.briangt.com/gallery/magur...ctors/PICT0057

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Old 9th May 2007, 11:33 PM   #504
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by Magura
.........................

And a pic of the beast in question:

http://www.briangt.com/gallery/magur...ctors/PICT0057

Magura

ha!

try that with 0,8mm wire .....




ugly!
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Old 9th May 2007, 11:41 PM   #505
Magura is offline Magura  Denmark
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Quote:
Originally posted by Zen Mod



ha!

try that with 0,8mm wire .....




ugly!

0.8mm wire would leave you with somewhat less sore hands

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Old 5th June 2008, 03:12 AM   #506
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I know that this thread is old news, but I've been exploring with a simulator and have discovered what seems to be better ways of setting up this amplifier. Schematic below has balanced input at 2.5 volts. BTW, my original amp doesn't sim very well, this is much better! Admittedly, I'm still testing and there are probably things I've overlooked. Still, this sim business is a whole bunch of fun!
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Old 5th June 2008, 03:21 AM   #507
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Here's a differential voltage graph of the outputs:
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Old 5th June 2008, 06:49 AM   #508
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Here's an interesting picture. I measured the dBV noise on one transistor drain vs. a differential voltage noise measurement against both transistor drains:

Oh, and I bumped R1, R2, and R15 to 0.33 ohms.
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Old 7th June 2008, 07:54 PM   #509
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So I thought I'd play with the most simple version of the ZV7-T -- a version with the big 1000 V/Z Plitrons and a pair of Loveltech LU1014D transistors. I employed a 5 volt power supply (ha) to keep the transistor in the concave portion of it's ID/VDS curve. I'll breadboard it this weekend.

The sim says that the LU1014D transistor power consumption is 7 watts per device -- just about where the ZV8 operates.

This idea came about because I have 110 db, 1W1M horns and only require a watt or two of power. This amp delivers approx. two watts, or so. Might be wonderful, who knows?

There seems to be a phase issue. All suggestions are welcome.

Here's a bunch of sim pics:
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Old 7th June 2008, 07:55 PM   #510
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more:
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