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Old 18th September 2009, 03:48 PM   #1011
logical is offline logical  Romania
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an audio transformer would do exactly what you need... but it's a lot of money...
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Old 18th September 2009, 05:22 PM   #1012
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Default Stuff Showed Up

Just wanted to say my stuff showed up.... I have yet to do a full inventory, but it looks like I'm missing (in addition to the 1 PA150 PCB) all 6 LM3886T's, and the 6 Dale resistors ATM.
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Old 18th September 2009, 07:42 PM   #1013
Electrons are yellow and more is better!
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Sorry, this seems to be my mistake. I will correct this when I order parts from Farnell. The missing PA150 might turn up but if not I will have red ones in two weeks.
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Old 19th September 2009, 03:22 AM   #1014
shmulik is offline shmulik  Israel
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Quote:
Originally Posted by logical View Post
an audio transformer would do exactly what you need... but it's a lot of money...
not exactly. it does not have the nice feature of being immune to passive linestage. it does simplify things, though. I've seem people manage soldering so-8 chips to strip boards and chip converter pcbs (so-8 to dip), so I think I'll give it a try even if P-A will decide it is not worthwhile to plan a dedicated board on behalf of the less knowledgeable.
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Old 19th September 2009, 07:42 AM   #1015
Electrons are yellow and more is better!
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It seems that you are alone about this but I think you could use an OPA1632 and some circuits for shorting one input when you want to use unbalanced signals.
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Old 20th September 2009, 01:44 AM   #1016
huy5005 is offline huy5005  Canada
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Hi i just received 4 PA150 boards. Thank you very much PA. I am waiting for the DRV134 boards
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Old 20th September 2009, 05:49 AM   #1017
Electrons are yellow and more is better!
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Good, but did it take so long to arrive at your place?
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Old 20th September 2009, 09:09 AM   #1018
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PA,
I have several bare transformer cores here and was wondering if you had a sketch of what the windings for unbalanced to balanced connections look like. There are many generic type layouts on the web. I just need the simple primary to secondary tap arrangements. Transformer winding info is like hens teeth. Very hard to find in simple form. If I use the proper gauge wire these cores should be good for at least 100khz

Thanks for the fabulous job you have done with this group buy. Kudos.
Post a sketch of your drv pcb when you get time. The only problem I ever had with the drv was buzzing from the wire layout. It was very hard to get rid of.

Anyone finish there bpa300 projects yet?

Tad
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Old 20th September 2009, 09:36 AM   #1019
Electrons are yellow and more is better!
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I talked with Rhys today and he has been sick and he did also sound sick. I'll get back to him when I'll get home.
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Old 23rd September 2009, 08:59 AM   #1020
Electrons are yellow and more is better!
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I talked with Rhys and he was on his way to the post office with pcb's and money. If we are lucky I will have them on Friday and by this only a few members are left. Then we are very near an end.
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