PCB Group buy [1]- 1MHz RMS/DC & 90dB LOG converter with 80dB LNA

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 :

Name	PCB Qty	Location	Paid	Shipped	Received
Frex	1	France	Yes	---
Carpin	2	Netherlands	Yes	Yes	Yes 10 feb
MRupp	1	Germany	Yes	Yes	Yes
Andrew T.	1	UK	Yes	Yes
grenert	1	USA	Yes	Yes	Yes!
AR2	1	USA	Yes	Yes	Yes
ccliu	1	Taiwan	Yes	Yes	Yes (2/15)
musafir	1	Italy	Yes	Yes	yes
Valeriano	1	Italy	Yes	Yes
Mother of PEARL	2	Canada
fitzfish	2	USA	Yes	Yes
schaikc	1	Netherlands	Yes	Yes
matejS	1	Slovenia	Yes	Yes	Yes
igwt	1	USA	Yes	Yes	Yes!
dfidler	1	UK	Yes	Yes	Yes
glao	1	USA	Yes	Yes
gagnou	1	Grece	Yes	Yes	Yes

Thank's

FREX

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The 01-februry 2011;

PCB are arrived today, it look like this :


Very good job from pcbcart.

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


Frex

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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.

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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.

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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.