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Adam Uraynar
Adam Uraynar
12:47 AM
Anyway, on a different note, has anyone ordered PCBs with a really big holes?
so ~20 mm or 0.75"
(It's for a manual on/off switch for the board)
 
 
2 hours later…
The Photon
The Photon
2:56 AM
@AdamUraynar If they can't drill it, they can route it. Though that might cost a bit more.
 
 
7 hours later…
uhoh
uhoh
9:38 AM
0
Q: How did Syncom-3 achieve eight stages of frequency doubling? I only see seven in the block diagram

uhoh@BlueCoder's nice answer to Syncom-3 was the first geostationary satellite. Anyone know of a description of the onboard electronics? mentions that the the master oscillator was doubled eight times to get to (nearly) X-band. The answer links to NASA Technical Report R-252 “Syncom Engineering Repo...

history communication-satellite geostationary electronics
 
 
7 hours later…
W5VO
W5VO
4:10 PM
@AdamUraynar Usually not a big issue, at that size it's almost certainly routed. Getting it plated may cost extra
 
 
2 hours later…
Marla
Marla
5:54 PM
@W5VO . . . Interesting how the word "routed" is used for track layout as well as cutting out a portion of the board.
 
W5VO
W5VO
@Marla And I suppose if we could get the boards to suddenly flee from battle, they would have been routed again
 
Marla
Marla
Touche
 
W5VO
W5VO
Heh... the Viking auto-router
 
Marla
Marla
That would be a formidable foe. I don't know what route I would use for escape.
 
 
3 hours later…
The Photon
The Photon
8:37 PM
@AdamUraynar FWIW, one shop I use that has fairly typical capabilities, the maximum drill size is 7.11 mm.
Most shops will be willing to give you a table of the drill sizes they support.
 
Adam Uraynar
Adam Uraynar
All good stuff to know. Thanks everybody.
 
 
1 hour later…
laptop2d
laptop2d
9:49 PM
Ugggh, monday, why do you have to last sooo long
 
JonRB
JonRB
10:03 PM
all week is mondays...
monday, monday2, monday3, monday4, monday5
 
Shalvenay
Shalvenay
hey there @Marla
 

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