Hello John,

The two versions of the A-122 are two completely different modules. The 3320 needs external electronics which are quite different from the 3379. For example: the resonance feedback path has to be done externally for the 3320, while it is internal in the 3379. Or : the four stages of the 3320 have to be wired externally, whil the 3379 has them connected internal.

So I have to say sorry: there is no difference in "build a diy 3320 module" or "modify a 3379 to suit a 3320".

Florian

On 11.10.14 08:43 , 'John V. Talbert' jvtalbert@... 1 wrote:

Could use some input here.  I have an A-122 with the CEM3379 that I purchased last year and was planning to exchange it for a CEM3320.  Does anyone know if there are any special modifications that I need to make to the A-122 beforehand or should this be a simple swap