r5890 - in trunk/gta02-core/bom: . dk research

[werner at docs.openmoko.org]

Author: werner
Date: 2010-04-03 21:45:01 +0200 (Sat, 03 Apr 2010)
New Revision: 5890

Added:
   trunk/gta02-core/bom/research/ant8001
Modified:
   trunk/gta02-core/bom/dk/digi-key.equ
   trunk/gta02-core/bom/gta02-core.equ
   trunk/gta02-core/bom/research/STATUS
Log:
One more part and a bit more research. Score:

SVN Rev -- No source -- -- Digi-Key --  -- Farnell ---  --- Mouser ---
        Short   Missing Parts   Price   Parts   Price   Parts   Price
r5890   10      12      82      1394     2      UKP 52   1       134

- bom/gta02-core.equ, bom/dk/digi-key.equ: added the Tyco 1734035-2 as an exact
  replacement for the CMK A425-206162-001 USB receptacle
- bom/research/STATUS: removed the CMK A425-206162-001
- bom/research/STATUS, bom/research/ant8001: researched the Wavefar WTE06016
  ISM antenna



Modified: trunk/gta02-core/bom/dk/digi-key.equ
===================================================================
--- trunk/gta02-core/bom/dk/digi-key.equ	2010-04-03 11:43:56 UTC (rev 5889)
+++ trunk/gta02-core/bom/dk/digi-key.equ	2010-04-03 19:45:01 UTC (rev 5890)
@@ -124,3 +124,4 @@
 DIGI-KEY 631-1039-1-ND			FOX FX425B-12.000
 DIGI-KEY XC1608CT-ND			ECS ECS-120-9-42-CKM
 DIGI-KEY 741X083330JPCT-ND		CTS 741X083330JP
+DIGI-KEY A31727CT-ND			TYCO 1734035-2

Modified: trunk/gta02-core/bom/gta02-core.equ
===================================================================
--- trunk/gta02-core/bom/gta02-core.equ	2010-04-03 11:43:56 UTC (rev 5889)
+++ trunk/gta02-core/bom/gta02-core.equ	2010-04-03 19:45:01 UTC (rev 5890)
@@ -20,3 +20,7 @@
 #
 
 UNIFIRST TAS4025A-12MHz		ECS ECS-120-9-42-CKM
+
+# USB connector
+
+CMK A425-206162-001		TYCO 1734035-2

Modified: trunk/gta02-core/bom/research/STATUS
===================================================================
--- trunk/gta02-core/bom/research/STATUS	2010-04-03 11:43:56 UTC (rev 5889)
+++ trunk/gta02-core/bom/research/STATUS	2010-04-03 19:45:01 UTC (rev 5890)
@@ -2,7 +2,6 @@
 
 Part			File		Status
 ----------------------	--------------	---------------------------------------
-A425-206162-001
 AAT1275IRN-5.0-T1	u4904		not researched yet
 ATR0610-PQQ		u7601		borderline availability
 ATR0635-7KQY		u7608		borderline av., expensive or long lead
@@ -24,6 +23,7 @@
 SN74AUP1G00DCKR		u4902		borderline availability, incomp. subst.
 TD028TTEC1		lcm		not found yet, brokers list it
 WM3236AQ		u8001		not found yet
+WTE06016		ant8001		not found, many incompatible subst.
 
 OPTIMIZATION:
 

Added: trunk/gta02-core/bom/research/ant8001
===================================================================
--- trunk/gta02-core/bom/research/ant8001	                        (rev 0)
+++ trunk/gta02-core/bom/research/ant8001	2010-04-03 19:45:01 UTC (rev 5890)
@@ -0,0 +1,18 @@
+ANT8001, U1: Wavefar WTE06016
+
+We have no data sheet of this ISM band antenna. Its size is about
+6.0 x 8.4 x 3 mm.
+
+There are many chip antennas for the ISM (2.4-2.5 GHz) band, usually
+of smaller size. Impedance is generally 50 Ohm, but we don't know
+what gain to use.
+
+A smaller antenna may require more attention with regard to separation
+from the ground plane.
+
+In any case, it seems very unlikely that an exact replacement can be
+found.
+
+Comment from Joerg: this type of bulky antenna is uncommon today
+Comment from Joachim: he remembers the gain of a vaguely similar
+  antenna to be around 1.2 dB