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Please help to decide box for FE103En

Posted 29th August 2011 at 08:54 PM by audiomovil

i want to build a box for my new FE103En, please help to decide between Buschhorn Mark II or the Sperrin and Vampyr-v, from Woden Design.
I use a Yamaha amplified 10" sub and Yamaha amp 60x2, for use in a living room 11 ft by 13 ft, for movies and music., jazz and rock.
Thanks for the help.
Gustavo Espino from Jalisco México.
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Best source for TX2575 Naked Z-Foil Resistor

Posted 28th August 2011 at 07:52 AM by dvb projekt
Updated 28th July 2014 at 10:12 AM by dvb projekt

All members who want to use the "holy grail" audio resistor,

the TX2575 Naked Z-Foil,

could order it direct at Texas Components.


That´s the cheapest way to get it IMO.

They have also great Trimpots with Bulk Metal Foil Technologie.





P.S.: If you send a mail to Arbie, send her regards from me!
Attached Files
File Type: pdf 5 Reasons to Specify Bulk Metal Foil Pots.pdf (800.9 KB, 925 views)
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Conn strobotuner

Posted 27th August 2011 at 01:17 AM by blackveilbridessixx

does anyone know how much a conn strobotuner model st 11 is worth?
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Projection lens and Fresnel lens

Posted 23rd August 2011 at 11:37 AM by djhot143

Hi to all friends,I am new here.
My name is DHIRAJ from mumbai,india.

I need your help, I want to make a projector but i am not getting parts of it.
Can anyone tell me where i can buy projection lens and Fresnel lens in Mumbai. plz help me.
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Rating: 2 votes, 4.00 average.

TDA1541A DAC Module V3.0 - Out of production

Posted 20th August 2011 at 08:32 AM by dvb projekt
Updated 19th June 2013 at 10:27 AM by dvb projekt

The Red Baron

aka TDA1541A DAC V3.0


Click the image to open in full size.


The evolution brings the following changes

- Direct shunt voltage inputs with shortest onboard traces
- I2S In-/Outputs with shortest onboard traces
- Upgrades DEM Synchronizer
- Onboard Grounded-Gate MOSFET Current Buffer I/V Stage
(-ecdesigns- MK7 version)
- Compacter design


Still on the module

- Separate GND-Trace for DEM-Synchroinizer
- Master/Slave connectors for parallel DAC module usage
and external I/V Buffer stages e.g.
Tube-I-zator & DDNF Stage
- Groundplane
- no SMD Design


Click the image to open in full size.


The PCB has the following data:

Material: FR4 - 2mm
Layers: 2
Board size: 125x73 mm
...
Attached Files
File Type: zip TDA1541A Project - BOM - for The Red Baron.zip (9.0 KB, 760 views)
File Type: pdf The Red Baron DAC.pdf (28.9 KB, 1662 views)
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unquitting

Posted 17th August 2011 at 11:10 PM by Erik F

I am back
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LM3886 x 3 First Test

Posted 16th August 2011 at 05:29 AM by panson_hk

I briefly measured the LM3886 x 3 parallel board this morning. THD vs freq for one, two in parallel and three in parallel are measured.

Load of 4 Ohm was also tested. When using one 3886, the on-chip protection activates periodically when doing low frequency (~ < 500 Hz) test. No such protection operation happens for the same output level for higher frequencies (>1kHz). The problem goes away when using 3886s in parallel.

More systematic tests will follow.
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LM3886 x 3 continue

Posted 15th August 2011 at 05:14 AM by panson_hk
Updated 15th August 2011 at 05:58 AM by panson_hk

The DC offset of the three 3886 are interrelated. Hence, adjusting them all 0.0 mV is tough if not impossible. I now made them all 8.9 mV to achieve DC balance. Next will adjust the AC gain. DC offset may need readjust again. This is a game for $ (cost foe DC servo) vs time.

The three 3886 have identical batch number.
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JE Sugden C51

Posted 13th August 2011 at 09:19 PM by Terry Barker

I have a sugden C51 control unit non operational. The unit has been tampered with. Can anyone help me with a cicuit diagram or where I may obtain one?
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LM3886 three in parallel board

Posted 12th August 2011 at 08:14 AM by panson_hk
Updated 12th August 2011 at 08:28 AM by panson_hk

Here is assembled LM3886 x 3 (inverting) board. I think you may see similar/identical board before. Who is the original? Copycats are everywhere. The kit comes with a Solen like film cap. Most likely a fake one. The measured data is not too bad though. The three LM3886 are samples from NS. Original!

The kit provides 0.2R 5% instead of 1% for paralleling the three 3886. Gain setting is by 200k and 10 k 1% metal film. Three 50 k trim pot are provided for DC offset adjustment. I do not solder the three 0.2R first in order to see the gain of the three 3886s.

One of the 3886 DC offset can't be adjusted to 0.0 mV. It has ~25 mV. The other two can be turned to 0.0 mV. This may cause a problem among them. Let see.
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