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user348179
2:13 AM
Someone experienced in CRTs, PLEASE help me. I'm confused about the G1 and G2 controls.

Questions:
1. The SCREEN pot on the flyback connects to the accelerating anode, right?
2. Which controls in the CRT adjust the G1 control grid voltage? My guess would be that the drive and low-light controls on the neck board are connected to the G1, considering that both the control grid and the drive/low-light controls affect the individual brightness of each cathode.
 
user348179
(And in case anyone's wondering, I'm asking in the chat room because I'm currently unable to get direct answers in questions.)
 
PlasmaHH
PlasmaHH
6:16 AM
CRT s? Working in a museum?
 
 
2 hours later…
Zeta.Investigator
Zeta.Investigator
7:59 AM
@GLaDOS Ah, Of course someone with GLaDOS avatar has only 2 questions not 3 #halflife3confirmed
 
JRE
JRE
8:49 AM
@GLaDOS : You might not be getting answers because you are posting half questions. What CRT? What device? Do you have a schematic, or even just a service manual?
 
 
2 hours later…
user348179
11:02 AM
@JRE My Panasonic CRT TV, no service manual.
 
Zeta.Investigator
Zeta.Investigator
2:41 PM
I love everything about this http://ellied.net:8080/edsc0000a.pdf
Tweeted by whitequark on April 23, 2018 at 6:08 PM
 
PlasmaHH
PlasmaHH
the price too?
 
Zeta.Investigator
Zeta.Investigator
@PlasmaHH insert 1 million dollars meme
Twitter replies suggest that @272.g THz, the silicon behaves weird. I don't know what is the significance of 1687 Kelvin though...
 
PlasmaHH
PlasmaHH
4 degrees above silicon melting point?
 
Zeta.Investigator
Zeta.Investigator
@PlasmaHH lol! That's a good find. Actually sillicon's melting point is 1687.15 Kelvin according to google
 
PlasmaHH
PlasmaHH
according to my google its 1410°C
which is 1683K
 
Zeta.Investigator
Zeta.Investigator
2:48 PM
Wow.."silicon melting point kelvin" prints out 1687 straight out
 
PlasmaHH
PlasmaHH
looks like there are various values available
looks like its extremely difficult to measure it
 
Zeta.Investigator
Zeta.Investigator
Seems like there was also a Write-only memory joke back in the day
 
PlasmaHH
PlasmaHH
I have tons of write only memory at home
 
Zeta.Investigator
Zeta.Investigator
reminds me of TM4C123's bug that @Asmyldof mentioned a while ago. It's about writing to EEPROM when a black-out occurs which bricks the chip
 
Marla
Marla
3:42 PM
Write only memory jokes, yes. However, the old 7 segment LED storage register was a write only memory. You had to read the display to know what was in that memory.
@Zeta.Investigator
 
Asmyldof
Asmyldof
4:15 PM
@Marla Not a true write-only
 
The Photon
The Photon
4:57 PM
@Zeta.Investigator Gotta wonder what they made the solder balls out of.
 
rdtsc
rdtsc
5:49 PM
Okay any co-ax experts out here? When we say "RG59 co-ax", what exactly does this imply? It seems like most RG59's have a working voltage of 300vRMS, 500v max. Is it possible to have an RG59 which is truly 5kV-capable? Or is "RG59" only implying Zo, C/ft, prop, etc.
 
Yashas
Yashas
what's the difference between a register and fifo?
why are registers used in inelastic pipelines and fifos in elastic pipelines?
 
The Photon
The Photon
RG-59
RG-59/U is a specific type of coaxial cable, often used for low-power video and RF signal connections. The cable has a characteristic impedance of 75 ohms, and a capacitance of around 20pF/ft (60pF/m). The 75 ohm impedance matches a dipole antenna in free space. RG (for radio guide) was originally a unit indicator for bulk radio frequency (RF) cable in the U.S. military's Joint Electronics Type Designation System. The suffix /U means for general utility use. The number 59 was assigned sequentially. The RG unit indicator is no longer part of the JETDS system (MIL-STD-196E) and cable sold today under...
The i.d. and o.d. dimensions are probably part of the spec as well as the Z0. That will limit the possible dielectric materials to be used, so it might not be reasonable to increase the breakdown voltage, unless you can by chance some better material with the same Dk but higher breakdown voltage.
 
PlasmaHH
PlasmaHH
6:18 PM
Teflon coax seems to make a good capacitor
 
The Photon
The Photon
@PlasmaHH Until you get to 1/4 wavelength
 
PlasmaHH
PlasmaHH
6:32 PM
@ThePhoton good point, I wonder how long the one in that multimeter is and with what frequency it operates
 
 
3 hours later…
KingDuken
KingDuken
9:32 PM
@Yashas Sounds like you're referring to a register which is quick access memory and FIFO which refers to the stack.
In any case, registers hold actual binary value calculations (i.e. adding, subtracting, etc.) whereas the stack is used to store those values where you can "pop" or "push" values.
Registers provide the location, stack provides the value
 

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