Power resistors, heat on PCBs - was Re: [TekScopes] 2236 Focus range.
On 2021-08-26 10:33 a.m., email@example.com wrote:
On 2021-08-26 10:19 a.m., n4buq wrote:Fwiw, I had a photo lying around. This PCB is on the bottom of theI recently had a 1/2W film resistor flame-out on the LV Supply board in my 2445 and it burned a significant divot in the board. I mounted the replacement about 1/8" or more off the board to give it some breathing room. Probably unnecessary as the cap that caused the resistor to burn out is now replaced but I did it just for good measure.In the Hewlett-Packard 'scope I have been working on (1340A), they have
instrument, facing down.