- easy way to calibrate audio frequency generator? - 6 Updates
- Need Help Identifying Ceramic Capacitor - 3 Updates
- Vizo HDMI ports not working. - 1 Update
| Paul Drahn <pdrahn@jodeco.com>: Mar 03 11:21AM -0800 On 2/28/2021 1:27 PM, Tinkerer wrote: > scale really. Output is from 200 Hz - 2 Khz on "low" and 2 Khz to 20 > Khz on "high". Exact frequency depends on where the pot is adjusted. > How can I calibrate this to be more precise, preferably in a simple way? Are you certain the problem is calibration and not really "resetability"? Paul |
| Phil Allison <pallison49@gmail.com>: Mar 03 12:22PM -0800 Paul Drahn wrote: ================ > Are you certain the problem is calibration and not really "resetability"? ** Having no scale on the dial guarantees both. ...... Phil |
| Clifford Heath <no.spam@please.net>: Mar 04 08:54AM +1100 On 3/3/21 10:29 am, Tim R wrote: > ... it may be gradually training people to expect things to be in tune. Except Sailor Sabor, of course, who holds the record for the most out of tune National Anthem ever, at the CPAC 2021 last week. Your entire National Anthem is out of tune with the 21st century, and the 20th too if it comes to that. Try reading the lyrics sometime and think about how it sounds to anyone not born American. |
| Phil Allison <pallison49@gmail.com>: Mar 03 02:18PM -0800 Clifford Heath wrote: ====================== > Your entire National Anthem is out of tune with the 21st century, and > the 20th too if it comes to that. Try reading the lyrics sometime and > think about how it sounds to anyone not born American. ** Yeah - the " Star Bangled Spanner" is looking a bit worn out. Probably get cancelled soon as "racist". Maybe they could adopt: "'Born in the USA" ? Oh shit, that's racist too !! ..... Phil |
| "Peter W." <peterwieck33@gmail.com>: Mar 04 04:10AM -0800 Given that it started as a drinking song (in 1775) - it was, is and remains quite apt. https://www.youtube.com/watch?v=8KcHg5ZOIgU Peter Wieck Melrose Park, PA |
| jeff bowman <jeff_a_bowman@outlook.com>: Mar 04 04:55AM -0800 On Sunday, February 28, 2021 at 4:27:15 PM UTC-5, Tinkerer wrote: > scale really. Output is from 200 Hz - 2 Khz on "low" and 2 Khz to 20 > Khz on "high". Exact frequency depends on where the pot is adjusted. > How can I calibrate this to be more precise, preferably in a simple way? If the pot is a common type change it to a ten turn type it will give you more control and add freq counter as others said. Jeff |
| Phil Allison <pallison49@gmail.com>: Mar 03 12:39PM -0800 worldw...@gmail.com wrote: ======================== > Phil - Appreciate the input and link to Mouser. I've contemplated replacing with a 3-prong cord but there seems to be some who say a two prong is better for a sound generator as to not pick up any interference off the ground from other devices. I'm a hobbyist so my depth of knowledge isn't so deep as to accept or refute their claims so I've just left it for now. Cheers. -Norm ---------------------------------------------------------------------------------------- ** Warning: The case of the unit will be floating at * 60volts AC* with no safety ground attached. That AC voltage ( with plenty of noise) will be coupled via 0.02 uF into the ground of any earthed reciever. Likely make it hum and buzz audibly. Your RF gene has only a 400Hz output for convenience. Earthing it is way safer. ...... Phil |
| Phil Allison <pallison49@gmail.com>: Mar 03 12:44PM -0800 Peter Wanker Rides Again: =========================== > www.antiqueradios.com/forums/viewtopic.php?f=8&t=363692 > https://www.byan-roper.org/steve/_Media/e-200-schematic.jpeg > On the 2/3 conductor line cord: If you look at the schematic - there are two (2) 0.01uF safety caps in series with a ground between them - which is the same common ground throughout the system. And, by the way, those are X-types as the are between the hot and the neutral. ** Weicky has wanked himself blind. Those two cap are *OBVIOUSLY* connected from hot AC wires to ground. Y class caps with not common back in the day. ...... Phil |
| "Peter W." <peterwieck33@gmail.com>: Mar 04 04:07AM -0800 Wrong again. Once more the drongo from down under, the official village idiot of this venue has outdone itself. Read the schematic. The caps do cross from hot to neutral. That they are *also* grounded does not change the issue. What happens when/if the ground fails? Oh, both X and Y capacitors have existed in common use since very roughly 1926, with research in ceramic materials starting in the mid-teens, perfected in the very early 1920s. I know that Australia is a technical wasteland, but really! Peter Wieck Melrose Park, PA |
| "ohg...@gmail.com" <ohger1s@gmail.com>: Mar 03 03:10PM -0800 On Wednesday, March 3, 2021 at 10:28:20 AM UTC-5, Stu jaxon wrote: > Hi Group, can someone help please, I replaced the main board 3655-0342-0150(41)... on a Vizio M550SV, the hdmi ports do not work. I resoldered the pins, and followed the suggestions in coppell tv repair video for a short did not find one,,,.. https://www.youtube.com/watch?v=8U-01HUx0qY. any help in this matter will be taken seriously, Thanks, Your replacement board is bad.. There are *two* HDMI problems on that Am-Tran main: the first is a bad HDMI transceiver chip. If the TV catches some lightning back through the cable box, the HDMI chip will die. If the chip gets hot to the back of a finger within 15 seconds or so it's bad. The second problem is that the ball grid chip under the heatsink is either bad or needs a reflow. Reflows last 1-3 years by my estimation before the problem returns, and assuming of course you don't toast the BGA while reflowing it. |
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