[urq] 2b relocate Alternator 'Siren' Noise?

[fdekat]

Say...  

Did anyone that has the 2B alternator 'relocation kit' (that relocates to
below the AC compressor) ever figure out the 'siren noise'

I think I remember someone saying that it was making a 'siren' noise, and may
be caused by the proximity of the alternator to 'something'.

There is a fair similarity between the construction of a mechanical siren,
and the structure of the alternator. 

I did find that if I covered the air intake on the rear of the alternator
when it was running, there was a significan reduction in the 'siren' sound.

I was thinkning next of installing the plastic 'air duct' that come on some
5Kt alternators, to see if that makes any difference, but was wondering if
any had any other sucess or tricks to help reduce the noise?

-Frank de Kat-