Hi Lou,

I assume you are talking about one of the transformer types, and not one 
of the switchers.   If that is the case, the answer is yes.   Remove the 
cover, on the right hand side of the supply ( looking from the front) is 
a small circuit board.  It is right above the big filter cap.  The 
soldered side of the board is facing up and components are down.   The 
variable component you adjust is on that board.  It isn't a knob, more 
like a little thumb wheel. It's very touchy, sighted help in watching a 
meter will help, but I've done it myself with the talking multi meter 
and some trial and error.

73, Steve KW3A
On 6/2/2011 10:07 PM, Lou Kolb wrote:
> Anyone know if there is a voltage adjustment inside the Astron power
> supplies?  I have a 35 amp supply that may need some tweaking.  Thanks.  Lou
>