Separating/removing the ceramic layer from the heatsink on Tektronix hybrids

[mrnuke]

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.

[mrnuke]

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.

[chihaxinh]

Why you need remove ceramic layer ? I have one Tektronix 2440 but running quite hot and fail in high frequency 

[mrnuke]

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.