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Frex 5th December 2010 07:27 AM

PCB Group buy [1]- 1MHz RMS/DC & 90dB LOG converter with 80dB LNA
 
6 Attachment(s)
HEllo,

It's the group buy page for the design describe in this thread HERE.


It's a 100x160mm epoxy FR4 PCB, 2 layers, metallised holes, silkscreen, varnish mask, gold finish (RoHs).

All interested DIYers can add his pseudo and location in the list below.

The price would be 25 for each PCB.
The price will include international shipping to EU,Canada and USA.
(Others country, please ask my by PM)

I will order professional PCB only if at least 10 PCB are ordered.

The buyers list start here :

NamePCB QtyLocationPaidShippedReceived
Frex1FranceYes---
Carpin2NetherlandsYesYesYes 10 feb
MRupp1GermanyYesYesYes
Andrew T.1UKYesYes
grenert1USAYesYesYes!
AR21USAYesYesYes
ccliu1TaiwanYesYesYes (2/15)
musafir1ItalyYesYesyes
Valeriano1ItalyYesYes
Mother of PEARL2Canada
fitzfish2USAYesYes
schaikc1NetherlandsYesYes
matejS1SloveniaYesYesYes
igwt1USAYesYesYes!
dfidler1UKYesYesYes
glao1USAYesYes
gagnou1GreceYesYesYes



Thank's

FREX

-------
The 01-februry 2011;

PCB are arrived today, it look like this :
http://oneaudio.net/Pict/ERMSDCV2_pcb.jpg

Very good job from pcbcart.

Normally, i will dispatch all of them before the end of this week.
:)

Frex
--------------------------------

The 16 frebrury 2011

After the full test of my own PCB prototype, some little modifications are needed.

  • The 2 capacitors of the low-pass filter formed by U12:A are inverted.
    C2 must have 200pF value and C3+C4 value must have 100pF total value.
    So, unsolder the capacitor C4(or C3), resolder it in parallel with C2 (100pF).
  • The two FET transistors (T4,T5) are mounted upside down.
    For working properly, you can connect the pin 2 to pin 1 together, then you rotate it from 180 of the silkscreen legend.
  • R78 and R21 have wrong values, you must replace them
    with 10kΩ instead of 100kΩ.
  • R55 is 49.9Ω (50Ω E96 value doesn't exist)
    R15 and R56 are 909Ω (900Ω E96 value doesn't exist).

Many tests were performed with my prototype, i will post all results very soon in the dedicated thread.

I also prepare a complete new design folder with test and adjustments procedure, history file, and much more.
When it will be done, i will send it to all PCB buyers by e-mail.
Thank you !
Regards.

FRex.

--------------
The 20 February 2011

Hello,

I have do all measurements on my own PCB, the results are publisher on the dedicated thread HERE.
Good reading !

Frex.
-----
The March 12- 2011

Hello

I've doing many work on the project and i posted some new documents:
_ A user manual to understand and doing measurements.
_ A full measurements report do with my ERMSDCV2.

These documents can be downloaded below,

* ERMSDCV2_manual
* ERMSDCV2_report

Good reading !
Some PCB are available for sale, late buyers are welcomed !

Frex.

Frex 3rd January 2011 06:35 PM

Hello and happy new year to everybody.

At this time, 17 PCB has been pre-ordered.
I will close the pre-order list very soon.
In order to send the Paypal invoice to all buyers, please send me a private message (or e-mail if you have it) with your personal e-mail address.

Thank you.

Frex.

Frex 6th January 2011 05:14 AM

Hello,

I need personal e-mail of :
Fizfish
igwt
AR2

Please PM me.
Thank you.

Frex

Frex 7th January 2011 04:11 PM

Hello,
Normally, i will send a paypal invoice this week-end.
(I wait again e-mail of AR2 and fitzfish).

I add a little note about this design.
I have designed a prototype of this design using new ICs (LT1968) and the log converter (AD8307) has been added externally with my preferred "on the fly" design way..
When i've drawn the final schematic and the PCB, i've took great care to do it in "the art rules" to avoid any issues.
Nevertheless, i can not guarantee that the design will includes no error.
I prefer inform any DIYers in order to avoid any misunderstanding.

Regards.


Frex.

Frex 10th January 2011 04:21 PM

Hello,

All Paypal invoices were sent (except for Fizfish because no e-mail).
I will send the PCB order to PCBcart as soon all payments will be done.
The full design folder will sent by e-mail only at the end of the week to buyers.
Thank you.
Regards.

Frex.

Frex 17th January 2011 06:11 PM

Hello,

PCB manufacturing order send to PCBcart.
I will send design files very soon.
:-)

Frex

Frex 1st February 2011 04:24 PM

The 01-februry 2011;

PCB are arrived today, it look like this :
http://oneaudio.net/Pict/ERMSDCV2_pcb.jpg

Very good job from pcbcart.

Normally, i will dispatch all of them before the end of this week.
:)

Frex

Frex 2nd February 2011 03:18 PM

Hello,

Unless one, all letters were been sent right now.
Please, edit the wiki page when you receive yours to follow all shipments.
You can also just send me a little PM/e-mail. ;)
Thanks

Regards.

Frex

Frex 20th February 2011 04:09 PM

Hello,


I have do all measurements on my own PCB, the results are publisher on the dedicated thread HERE.
Good reading ! :)

Frex.


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