#garfield Logs

Jun 22 2021

05:18 AM polprog: i was so tired yesterday i forgot to test someting with the oscillator
05:25 AM polprog: i feel bad about it
08:54 AM rue_mohr: mhm
12:18 PM polprog: I cant get this thing to oscillate at 100MHz
12:19 PM polprog: it's either 20MHz or nothing
04:15 PM Tom_L: no cutter today
05:08 PM polprog: Whatever I do to this crystal it will not oscillate in any overtone mode
05:12 PM Tom_L: how can you tell if it is or not?
05:12 PM Tom_L: i've never tried that
05:12 PM polprog: it says 100MHz on the package, it oscilaltes at 20 now
05:12 PM polprog: it's a HC-49/U crystal
05:13 PM polprog: i have the datasheet
05:13 PM Tom_L: won't do me any good at this point
05:13 PM Tom_L: been away from it too long
06:48 PM polprog: i have it oscillating nicely at 20MHz but as soon as i put any network that would should make it work in overtone mode, it stops
09:12 PM rue_shop2: yea I think you need a LC tank to help it into the right resonance
09:59 PM rue_mohr: so, the order of opertions in kicad is a bit odd, but it seems to work nicely
09:59 PM rue_mohr: less trace thicknesses
10:34 PM rue_shop2: wifi walkie talkie
10:35 PM rue_shop2: weling timer
10:39 PM Tom_L: wifi walkie? ..... cell phone!
11:06 PM rue_shop3: 3rd screwdriver rack
11:48 PM rue_mohr: no, we have a bunch of situations at work we need to babble back and forth and there is no cell or radio-ness
11:48 PM rue_mohr: with wifi, we could just drop repeaters
11:49 PM rue_mohr: as req'd
11:50 PM rue_mohr: oh, cast base for ma