tardishead
Well-known member
- Joined
- Aug 11, 2004
- Messages
- 623
Been trying to use acrylic both 2mm and 3mm to make turret boards for tube mics with limited success.
Acrylic seems to crack under very little stress. Can install the turret lugs fine but as soon as I start to install components - the heat and pulling stress of the components seems to make cracks. I think IPA when used too much can also encourage crazing and eventual cracking as well.
I see that old mics use acrylic boards and turrets so I cant think what I am doing wrong here. Although I've read reports of old boards crumbling and failing in Elam 251 etc.
Is there a special grade of acrylic that needs to be used? Also a lot of materials are called acrylic - including Plexiglass and Perspex. I'm a bit confused as to what to use here.
Also is there any other kind of board that might be more suitable for turret lugs in mics. I've read that acrylic is preferred because it has a very high electrical resistivity. That Garolite does not have as high resistivity. What about PTFE or something which is easy to machine but maintains strength without being brittle
What about FR4 without copper clad?
Acrylic seems to crack under very little stress. Can install the turret lugs fine but as soon as I start to install components - the heat and pulling stress of the components seems to make cracks. I think IPA when used too much can also encourage crazing and eventual cracking as well.
I see that old mics use acrylic boards and turrets so I cant think what I am doing wrong here. Although I've read reports of old boards crumbling and failing in Elam 251 etc.
Is there a special grade of acrylic that needs to be used? Also a lot of materials are called acrylic - including Plexiglass and Perspex. I'm a bit confused as to what to use here.
Also is there any other kind of board that might be more suitable for turret lugs in mics. I've read that acrylic is preferred because it has a very high electrical resistivity. That Garolite does not have as high resistivity. What about PTFE or something which is easy to machine but maintains strength without being brittle
What about FR4 without copper clad?