[cctalk] Re: ADM3a screen rot.

2024-01-29 Thread Paul Koning via cctalk
> On Jan 29, 2024, at 8:47 PM, Jonathan Chapman via cctalk > wrote: > >> This apparently is true of some capacitors as well, I'm not sure which types. > > It is true of all capacitors (CRTs are intentional capacitors, after all) > designed for and subjected to sufficiently high voltage.

[cctalk] Re: ADM3a screen rot.

2024-01-29 Thread Jonathan Chapman via cctalk
> This apparently is true of some capacitors as well, I'm not sure which types. It is true of all capacitors (CRTs are intentional capacitors, after all) designed for and subjected to sufficiently high voltage. It's referred to as dielectric absorption, and is why HV caps ship from the factory

[cctalk] Re: ADM3a screen rot.

2024-01-29 Thread Paul Koning via cctalk
> On Jan 29, 2024, at 6:59 PM, Pete Turnbull via cctalk > wrote: > > On 29/01/2024 20:45, William Sudbrink via cctalk wrote: >> Sellam Abraham wrote: >>> I think you were fine. That's how you discharge them anyway. You >>> were just missing the grounding wire :) > >> I'd rather not be the

[cctalk] Re: ADM3a screen rot.

2024-01-29 Thread Fritz Mueller via cctalk
> On Jan 29, 2024, at 9:54 AM, William Sudbrink via cctalk > wrote: > ...the anode cap on the leaking CRT had gone rock hard and there was a small > "streak" on the back of the CRT that looked like the plastic that it was made > of had released some sort of oil… Often times dielectric

[cctalk] Re: ADM3a screen rot.

2024-01-29 Thread Bill Degnan via cctalk
Is there a definitive guide for repairing screen rot. One of mine needs it. I have watched others but I have not attempted my own. I might try this at the Kennett Classic workshop this upcoming Feb 17th Bill On Mon, Jan 29, 2024 at 11:41 AM William Sudbrink via cctalk < cctalk@classiccmp.org>