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Electronics => Repair => Topic started by: mrnuke on June 26, 2016, 10:55:21 pm

Title: Separating/removing the ceramic layer from the heatsink on Tektronix hybrids
Post by: mrnuke on June 26, 2016, 10:55:21 pm
I'm referring specifically to the hybrids in the 2400 series analog scopes. Has anyone tried this? I'm thinking of replacing the ceramic with a PCB rather than blindly seek undiscovered pockets on Unobtainium.

I've tried heating it up with a heatgun, but the ceramic won't budge. I want to do this while preserving both the heatsink and ceramic.
Title: Re: Separating/removing the ceramic layer from the heatsink on Tektronix hybrids
Post by: mrnuke on July 08, 2016, 12:04:38 am
Finally did it! The secret is to prop up the heatsink on some helping hands. Set the heat gun to max heat, max air, no nozzle.

Then, with one hand and a set of pliers, hold the heatsink in place, while with the other hand and another set of pliers, wiggle the ceramic until it comes off. The glue is very sticky and gummy.
Title: Re: Separating/removing the ceramic layer from the heatsink on Tektronix hybrids
Post by: chihaxinh on July 08, 2016, 01:39:11 am
Why you need remove ceramic layer ? I have one Tektronix 2440 but running quite hot and fail in high frequency  :-//
Title: Re: Separating/removing the ceramic layer from the heatsink on Tektronix hybrids
Post by: mrnuke on July 08, 2016, 06:45:22 pm
Quote from: chihaxinh on July 08, 2016, 01:39:11 am
Why you need remove ceramic layer ? I have one Tektronix 2440 but running quite hot and fail in high frequency  :-//

It will all become clear in a few weeks.