Digitally controlled preamp/headphone amp

[troystg]

hammond extruded aluminum cases. The lid can slide in and out.

I have not found the sliding top cases in the US... You have a part #?

The only ones I have been able to find were the retangular "tube" enclosures.

 

[Dark Shadow]

I have not found the sliding top cases in the US... You have a part #?

The only ones I have been able to find were the retangular "tube" enclosures.

http://www.hammondmfg.com/1455ptblb.htm

You should be able to find the correct part number looking at theses pictures.

DS

 

[troystg]

http://www.hammondmfg.com/1455ptblb.htm

You should be able to find the correct part number looking at theses pictures.

DS

I clicked on the first couple and they were solid tubes..

I checked the rest just to be "Thorough" and WALA! the BOTTOMS are remove able!

Thanks again!

 

[Evilsizer]

I clicked on the first couple and they were solid tubes..

I checked the rest just to be "Thorough" and WALA! the BOTTOMS are remove able!

Thanks again!

all the ones in that link have removeable bottoms?

 

[troystg]

all the ones in that link have removeable bottoms?

Negative. The first few are solid all the way around, the next few have removable bottoms. Click on the picture and it enlarges.. Hmmm that sounds funny .

 

[edjosh23]

If you look at the number of screws per side you can tell, 4 per side means removable, 2 per side means perminant bottom.

You can go to Mouser to buy them.

here

I think I'm going to try the 1455N2202 . This will give me a little playing room and I am hoping to add input selection and dual RCA outputs, one will be going to a subwoofer amplifier the other to my tube amp or GC.

Josh

 

[edjosh23]

Thanks Russ and Brian, I got the preamp today it looks very nice. Unfortunately I didn't get to look at it but for the couple second it took to open up the package because I had to go to a friends house. It is so mini, much smaller than I expected. I have to wait for my AD8620s to come until I will assemble the circuit.

Thanks,

Josh

 

[tilt]

Tried AD8397s...
It sounded fine, but the chips got hot really fast. Oh well

 

[maxlorenz]

Uff! I finished to read the thread...

Congratulations to twistead pear audio for this effort

It looks as a wonderful price/performance project

I have a question regarding Tx wiring:
I saw some members actually send both "center tap" TX leads to the ground power connector on the PCB. These leads carry all the current that flow on the TX.
Wouldn't it be better to follow the diagrams provided and solder both "center tap" wires far from PCB, near the TX, and then send from there a single wire to atain the mentioned power connector?

Thanks
M

 

[Russ White]

Wouldn't it be better to follow the diagrams provided and solder both "center tap" wires far from PCB, near the TX, and then send from there a single wire to atain the mentioned power connector?

Thanks
M

Hi Max,

Thanks a lot for the kind words. You are of course correct that it would be better to do as you suggest, It is simply easier to wire it they way Brian suggested, I don't think in practice it makes any tangable difference though because the leads of the transformer we supply are very short.

Cheers!
Russ

 

[kestrel200]

Hey Russ,

When is the Darwin going to begin shipping??

Mike

 

[Russ White]

Hi Mike, On or before April 10.

 

[maxlorenz]

Thanks, Russ, for the quick answer

I think I'm gonna fall for these... my lady will kill me

Come on guys, be more expressive and share with us your listening experiences!
We are starving

Best wishes...
Mauricio

 

[kestrel200]

Hi Mike, On or before April 10.

Thanks Russ! I'm trying to decide wether to wait to build my Kookaburra or wait for the Darwin.

 

[Russ White]

Well darwin, is not a preamp. It is simply a source selector.

 

[kestrel200]

Well darwin, is not a preamp. It is simply a source selector.

I guess I didn't word that to well. What I meant to say is I was trying to decide wether to go ahead and build the preamp I already bought from you without the Darwin or wait to build it until I got the Darwin and incorporate it into the preamp.

 

[Russ White]

Oooops!!! Sorry to misunderstand you. Well you can always get the kooka done first at least you will have something to play with in the mean time.

Cheers!
Russ

 

[neutron7]

a bit of confusion here. on TI page the 2310 is the 15 volt one and the 2311 is 5 volt. but when i recieved my 2310 the package said 5V

confusion

http://focus.ti.com/docs/prod/folders/print/pga2310.html

 

[magnum_1]

Hello all,
I've finished my kookaburra just now, but it doesn't work!!
All components are in the right place,but when I tried (with my inverted Gainclone) all the sound that I can hear is like a bzzz-bz-bzzzzz-bzz....
I try with a tester and I found the right and left signals "OUT" are in short circuit with the ground, so is it normal?? I checked all PCB starting from left and right signals "IN"(not in short cicuit)trough OP and Pic (with or without them)and at the end 3 pin header "OUT" are in short circuit!!
So, I'm not very able in electronic,pot +5 header is OK, all seems ok, but it doesn't work!
Someone can help me please?

Alessandro

 

[Russ White]

Someone can help me please?

Alessandro

Hi Alessandro,
Is it possible for you to post some pictures of the top and bottom of the board? Close up would be great.

I am sorry you are having rouble. Lets see if we can get you fixed up.

Cheers!
Russ