audio-talk

Well not a lot of interest in this Buffer them
I have backed off the current to about 6mA 2.45v/373R= 0.006mA
Also would there be any benefit in adding a 220uf with 0.1uf bypass caps on the power +/-rails of the buffer

Right found the Data sheet for the J310 so its 25v 10mA
setting the preset @ 271R gives me a voltage of 2.29v
2.29v/271R=0.008mA would this be a tad to high for the J310 limit of 10-mA

Hi All Well Have built this Sold state discrete buffer with Jfets using it with my EBay AK4396 Dac As advised here I took the single off the 4.7uf cap and replaced the 1uf cap with a 100k resistor to ground see moded schematic I also set the Source leg of the J2 FET which is a j310 too 270R as the S...

Yep The Device manager Code is east to fix I just uninstall the problem device and reboot that then fixes the error and loads the usb hard drive again and all is fine for a time and then windows 7 disconnects and reconnects the offending usb Hard drives with the windows usd audio tone AS this is hap...

Event Log said
Source: Disk Event ID: 51 An error was detected on device \Device\Harddisk3\DR76 during a paging operation
any ideas on a fix for this happens on two of the External USB Hard Drives
Description:2
An error was detected on device \Device\Harddisk7\DR109 during a paging operation

Anyone know what's happening here I recently added a four port PCI-E USB 3 card to run four external USB 2 Hard drives but something odd is happening I keep getting random hard drives dropping out Devise manager Error codes between 28/34 :( after uninstalling and restarting the pc all work fines for...

Yep so am I Philip
But you have answered the question I was after CT is not used for some reason I keep think the CT must be connected to OV
i am looking to get near 300v from the 150-0-150v don't like TX thay confuse me

Ok looking at that psu I posted earlier using a CT with a switchable valve / Bridge rectifier arrangement don't seem right for a single rail supple as all psu schematic I have come across that are using a CT with SS Bridge rectifiers are all split rail +/_

Think that's a IDE 80GB ATA/100 HDD what is the mother board as it may not run a big drive of the size you want
Download this and it will give you the drives spec


http://www.filehippo.com/download_speccy

I see David Bowie is back with a new single after 10 year plus an Album later in the year have to say I was never really a fan of Bowie apart from the Ziggy years
http://www.telegraph.co.uk/culture/cult ... ingle.html

Yep I will be using the SS diode way what I and trying to get at is the 0v the CT tap left unconnected
and is the TX current still 100mA or raised to 200mA if the 0V CT is not used giving me about 0-300v

Why the hybrid bridge what is the reason behind this my 6D22s in my J E Labs EL34 are just connected to the 6.3 tap as in this link my 360-0-360 CT TX
http://www.tube-town.net/info/sed-techn ... 52fig1.gif

On that diagram the centre tap is at 0v because it uses a valve full wave rectifier. Not sure why it's got 2 extra diodes though. Thinking about it, it is a hybrid bridge, so perhaps the centre tap is NOT grounded, just left as 0v. That psu is custom so you can switch to use valve or ss I will just...

Hi mike
Yes it was the swap on the Marshall Mains OPTX i had
Cant remember if its 50/100VA but its 300vCT @100mA uprated Hammond 369 is the ct left unconnected then heres the psu but at about 50ma load not the 67mA sa on the this schematic

pre65 wrote:

colin.hepburn wrote:

pre65 wrote:
Mike will chip in about that before too long. I was thinking about some of the Hammond transformers.

Well yes it is a beef up Hammond 369BX I had made up by Denbury john

. I thought the bloke at Danbury was Dave.

it is did i say john