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| The problem is: parts that fit the board! |
I have been an engineer for many years. Sometimes even before a careful design phase and even before the prototype phase of a project…There comes a creation called a “Demo Device”. I have known some masters of this ugly beast. The idea is to scrape together whatever components you have on hand and quickly build “something”. Yeah sure, it works, in a very tightly controlled and some times perilously working state. But if it holds together long enough for the board room demo…backs are patted, checkbooks come out, and the real work can begin. The problem is you can build one of just about anything, making copies is another thing altogether. This is called product development. I am afraid the DSP-610 may be not quite a product.
I did a review of the BOM and then a visit to the builder’s blog confirms my suspicions:
I have had the board less than a week and already the parts supply issues are there? For example; the coaxial relays in line item number 66:
NUMBER
|
QTY
|
REFERENCE DESIGNATOR
|
DESCRIPTION
|
66
|
4
|
RL1,RL2,RL3,RL4
|
REED RELAY, SPST, COAX SHIELD
|
Has a slight supply problem, first it is no longer available at:
ORDER NUMBER
|
VENDOR
|
UNIT
|
MIN ORDER
|
ORDER QTY
|
LINE
|
RLY-514
|
ALL ELECTRONICS
|
$ 0.75
|
1
|
4
|
$ 3.00
|
More like:
Index
|
Quantity
|
Part Number
|
Description
|
Customer Reference
|
Available Quantity
|
Backorder Quantity
|
Unit Price
|
Extended Price
|
1
|
4
|
RELAY RF SPST 500MA 5V
|
4
Immediate |
0
|
9.91000
|
$39.64
|
Better get these on order soon anyway, $40 bucks!? well,so much for the $200 BOM. OK, so the blog says you don’t need them if you use the power module. Ordered that this week for $15 Just in case...Also we see several other questionable parts that may need immediate attention:
NUMBER
|
QTY
|
REFERENCE DESIGNATOR
|
DESCRIPTION
|
35
|
4
|
FL1,FL2,FL3,FL4
|
CRYSTAL FILT 10.7 MHZ, 15KHZ BW
|
ORDER NUMBER
|
VENDOR
|
UNIT
|
MIN ORDER
|
ORDER QTY
|
LINE
|
520-107-15B
|
MOUSER
|
$ 2.25
|
2
|
4
|
$ 8.98
|
And this one:
NUMBER
|
QTY
|
REFERENCE DESIGNATOR
|
DESCRIPTION
|
59
|
1
|
O1
|
Programmable Oscillator 10-160MHz CMOS
|
ORDER NUMBER
|
VENDOR
|
UNIT
|
MIN ORDER
|
ORDER QTY
|
LINE
|
SI570 CMOS
|
KM5H.softrockradio.org
|
$ 18.00
|
1
|
1
|
$ 18.00
|
STAY TUNED IN!
~ ~ ~
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