Thanks Steve.  Yes, it's a linear supply although I've never had occasion to 
look inside of it.  Occasionally, the K3 shuts down when I key it so I need 
to check for voltage drop and then see if it needs adjusted.  At least it 
should be a fairly straight-forward problem to deal with and I do have one 
of the old rad shack talking multi meters.  73,  Lou -- WA3MIX
----- Original Message ----- 
From: "Steve Forst" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, June 02, 2011 10:31 PM
Subject: Re: astron supplies


> 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
>>