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Gamma-2 (γ2) DAC Thread - Page 13

post #181 of 2109
7/18/09 at 8:25pm
That's kinda what I figured but didn't know exactly what kinda output may be coming from the opamp.

I finished ordering parts. For enough parts to build two y1's and two y2's with Vishay resistors and a few optional caps and stuff it comes to $203 Mouser and $80 Digikey(neither with shipping included), plus the Farnell case and amb shop stuffs. I think if you just ordered what you need for your specific build you could easily put this in a case for $150 plus shipping.
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post #182 of 2109
7/19/09 at 2:55am
Hum, something is strange on Newark ...

TOSHIBA - TOTX147PL - TRANSMITTER, FIBRE OPTIC says there is 688 pieces on stock right now ...

I place order, but:

05M1615 - TOSHIBA TOTX147PL - 4 - 4 - $3.03 Each - Back Order -
This item is currently on back order with the manufacturer. View Ship Date/Tracking Number field for expected ship date(s).

Expected Ship Date - 16 Jul 2009 but - is not shipped yet ...

Anyone can explane whats goin on there ?



By the way:

05M1608 TOSHIBA - TORX147PL - 4 - 4 - $3.33 Each - Complete
This item has been processed and shipped. 15 Jul 2009
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post #183 of 2109
7/19/09 at 4:32pm
I guess you noticed under the "688 pieces" that it says...
Farnell UK / Direct Ship
- Non-Cancelable/Non-Returnable
Handling Fee $20 per order
Delivery within 7 business days

If you hover your mouse over the "Farnell UK / Direct Ship" , it says the $20 service charge is in lieu of a Farnell freight charge. That's what made me decide to go ahead and order the Box Enclosure and TOTX both from Farnell UK. I wonder if they charge $20 per item ordered or if it's just one $20 fee for your entire order.


That link you gave for Newark shows they also have all the Box Enclosures except the gold color, however it says nothing of the $20 handling fee so they must be in stock here in the states, and nicely priced at $11.10.

If you decide to go with Newark we can see what the difference is between yours and mine, parts/shipping/handling, etc. The kicker with Farnell is if you use CC/DC the minimum order is 20 pound.
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post #184 of 2109
7/19/09 at 5:11pm
Quote:
Originally Posted by digger945 View Post
I guess you noticed under the "688 pieces" that it says...
Farnell UK / Direct Ship
- Non-Cancelable/Non-Returnable
Handling Fee $20 per order
Delivery within 7 business days

If you hover your mouse over the "Farnell UK / Direct Ship" , it says the $20 service charge is in lieu of a Farnell freight charge. That's what made me decide to go ahead and order the Box Enclosure and TOTX both from Farnell UK. I wonder if they charge $20 per item ordered or if it's just one $20 fee for your entire order.


That link you gave for Newark shows they also have all the Box Enclosures except the gold color, however it says nothing of the $20 handling fee so they must be in stock here in the states, and nicely priced at $11.10.

If you decide to go with Newark we can see what the difference is between yours and mine, parts/shipping/handling, etc. The kicker with Farnell is if you use CC/DC the minimum order is 20 pound.
I DID order, but - never mind they say 688 pieces is on stock, after order i got shipped just TORX - not TOTX too ... they say TOTX is backordered - even stock says is 688 on stock, never mind where is this stock ...

After order i got this in order history:
-----------------------------------
05M1608 - TOSHIBA - TORX147PL - 4 - 4 - $3.33 Each - Complete -This item has been processed and shipped 15 Jul 2009
-----------------------------------
05M1615 - TOSHIBA - TOTX147PL - 4 - 4 - $3.03 Each - Back Order - This item is currently on back order with the manufacturer. View Ship Date/Tracking Number field for expected ship date(s). Expected Ship Date 16 Jul 2009
-----------------------------------


Today is July 19th and TOTX is still not shipped ... Like they say - BACKORDERED ...


This is what is confusing to me ... Do they have on stock or not ... And - when they gonna ship ...
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post #185 of 2109
7/19/09 at 5:19pm
I don't know why they say BACKORDERED. I am not familiar at all with ordering from Newark/Farnell.
I ordered from Farnell, and it too says 688 in stock, but no backorder when I checked out.
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post #186 of 2109
7/19/09 at 5:21pm
Just call them on Monday to find out what' the scoop is.
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post #187 of 2109
7/19/09 at 5:59pm
I am on short vacation from monday - some traveling around Germany .. will be back in 7 days or something .. will see whats goin on ...
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post #188 of 2109
7/23/09 at 5:39am




And if you happen to be thinking what I would be thinking after seeing that picture.... this is what the soldering on the top one looks like up close:

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post #189 of 2109
7/23/09 at 10:59am
MisterX - Any pics with the board mated with a y1?
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post #190 of 2109
7/24/09 at 12:15am
Yeah, I have a bunch of pictures with the two boards plugged into each other but there is not a whole lot to see there.
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post #191 of 2109
7/24/09 at 3:28am
Here are the top and bottom views of the γ2 prototype PCB (v0.12). These boards will be shipped to the prototype team members tomorrow.

As seen in the pics posted by MisterX, he has already built three of them, and they work!



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post #192 of 2109
7/24/09 at 4:41am
Very excellent
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post #193 of 2109
7/24/09 at 8:02am
Looks nice!

...... but why all the extra holes on the PCB
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post #194 of 2109
7/24/09 at 8:09am
Quote:
Originally Posted by Beefy View Post
...... but why all the extra holes on the PCB
The board has double ground planes, one on each side. Those "holes" are a matrix of through-plated vias to stitch the two planes together, to keep them as tightly-coupled as possible even at very high frequencies.
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post #195 of 2109
7/24/09 at 8:12am
Roger roger
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