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Group order of non-inverted LM3875 pc boards? Anyone interested?

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#161
i'd just *love* to compare one of these "kit-cards" with a gaincard or an audiozone amp.

I was just wondering what to build first, a linn klimax clone or an aleph-x and now this thing comes along... 😉

damn.. 😉

About those shipping costs; could you also check what it would cost to ship it to the netherlands?
 
#163
matjans said:
i'd just *love* to compare one of these "kit-cards" with a gaincard or an audiozone amp.

I was just wondering what to build first, a linn klimax clone or an aleph-x and now this thing comes along... 😉

damn.. 😉
Click to expand...

Well, with this kit, you can take a short break with your other projects, build this kit, then resume your other projects. There are so few components, and simple requirements for it, so it is probably the easiest amplifier that you can build of any kits.

--
Brian
 
#166
Here is the International Calculator of the United States Postal Service (USPS):

http://ircalc.usps.gov

You can also download a pdf file here with the postal rates.


Besides the postage, you may have to pay additional taxes and/or customs fees when the package arrives (international orders).

This depends on the value of the package and the country you live in.

To avoid these extra costs, Brian would have to enter a lower value on the customs form. The only problem with this is you cannot insure the package for the real value anymore.

In the Netherlands a package with a value below 22 Euro's (including postage) is tax-free. This amount is not the same for every country.

Sometimes it also helps to check the box marked: Gift instead of Mechandise on the customs form.
 
#168
tracking orders

Brian,

A suggestion for future tracking of order without creating another spreadsheet.

Why don't you create a couple more column on the wiki page to include something like "paid", "shipped", etc .... so that after the cut off date, you can just print out the wiki page and use that for tracking all the orders. You probably have much more clever ways of handling it but it's just a suggestion ...
 
#169
bsyyu said:
Hi Peter, Brian

I have two 300VA transformer at hand with 30-0-30. Is it OK for this gainclone project. Do I have to unwire the copper wire to make it 24-0-24 for making 34V output.
Yours help is appreciated.
Tks

Ben
Click to expand...

It is too much. The max voltage supply for a chip is +/- 40V DC (or so), so your 30V AC secondaries will almost certainly produce more than that. You can unwind secondaries, and I did it before with great success. You should aim for about 5V less on ea. secondary.
 
#170
Great idea by the way!

One other question though. I don't have a paypal acount, and to be honest I probably don't need one, but would it be possible to mail you a check or money order ( <- probably more reassuring from your standpoint). I know it's not as fast, but I don't mind waiting a couple days for it to get to you.

If you really want paypal, thats not a problem. Is it a free service?

BTW, will the PCB's (at least) maybe be a regular item from you?

EDIT: added name for 2 PCB kits.
 
#171
Hybrid fourdoor said:
Great idea by the way!

One other question though. I don't have a paypal acount, and to be honest I probably don't need one, but would it be possible to mail you a check or money order ( <- probably more reassuring from your standpoint). I know it's not as fast, but I don't mind waiting a couple days for it to get to you.

If you really want paypal, thats not a problem. Is it a free service?

BTW, will the PCB's (at least) maybe be a regular item from you?

EDIT: added name for 2 PCB kits.
Click to expand...

This is the first of a few kits that I want to offer. As for this order, I am working out payment details, and getting all the parts lined up that I need to get. I have had a hard time with the exotic resistors, having to source from 4-5 different vendors for one of them to avoid a 5-week lead time.

I will follow through with this order, as long as the demand is there, doing a batch of orders at a time.

The pcbs are the easiest part of the order, especially since the following orders will not have the tooling and testing charges on them.

--
Brian
 
#173
#175
Ordering 4 kits.

When will the next reduction in price be anyways?

edit-Quick question, My source will be a pc sound card(M-audio revolution). I asked one of the guys who markets the sound card what the output voltage of the sound card was and this was his response
The Revo output voltage is 3.32v peak to peak.
Would this pose any problems for the gain?
 
#176
AJ Bertelson said:
Ordering 4 kits.

When will the next reduction in price be anyways?

edit-Quick question, My source will be a pc sound card(M-audio revolution). I asked one of the guys who markets the sound card what the output voltage of the sound card was and this was his response
The Revo output voltage is 3.32v peak to peak.
Would this pose any problems for the gain?
Click to expand...

As for the price getting lower, I have decided to not lower the price anymore, but instead, donate a substantial amount of the proceeds to diyaudio, to cover their server costs. Server costs are quite expensive for running the server now, since they are no longer getting free hosting.

I don't believe that this will cause problems with the gain, if you have a proper volume control. What are you using for volume control? As for using the a sound card, I found that I had to turn down the volume on the control panel of the computer down to about 80%, or else I would get distortion on the output during loud passages.

--
Brian
 
#179
You should be careful, You let them [H] guys get in on this, and you'll have single lm3875's doing 1.2ghz putting out 250W submerged in liquid nitrogen.
Might get ugly.
:hot:
 

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#180
For the people using the Wiki, please add your entry to the bottom of the list. I do have a list on my local computer that I have been updating periodically, and if I see an entry added to the top of the list, I will place it at the end.

I have been doing research on shipping for this order, and should be ready to order the pcbs, and start taking payment soon.

Link to Wiki:
http://www.diyaudio.com/wiki/index.php?page=NI+GC+PCB+Group+Order

--
Brian
 
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