22-05-2017, 08:39 AM
Old foam rubber frequently rots and sometimes goes very horrible indeed. Well done for finding the problem and fixing it before it did really serious damage.
Be aware that the black and pink antistatic foams are conductive and might give problems if in contact with high impedance circuitry. I measured the conductivity of a few samples of black foam and they vary widely, over several orders of magnitude.
Look out for foam inserts in some CD cases, usually those with 2 or more discs. Battery compartments in radios sometimes have a foam insert. Also quite a few items have been packed in foam rubber over the years so it's worth checking your stores to see if anything is suffering from the dreaded rot.
Be aware that the black and pink antistatic foams are conductive and might give problems if in contact with high impedance circuitry. I measured the conductivity of a few samples of black foam and they vary widely, over several orders of magnitude.
Look out for foam inserts in some CD cases, usually those with 2 or more discs. Battery compartments in radios sometimes have a foam insert. Also quite a few items have been packed in foam rubber over the years so it's worth checking your stores to see if anything is suffering from the dreaded rot.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
