--- In [email protected], "kd8dey" <kd8...@...> wrote:
>
> Howdy y'all. I came across the repeater builders website looking for
> information on the Astron 35A. I am in my 4th quarter at ITT and just started
> Devices 1.
>
> I just received a non working 35A from another ham for use as "Study"
> material for our electronics club.
>
> Looking at the 4 different schematics available I Believe that we have the
> one based on the 1991 schematic.
>
> So far we know that the MCR225 is toast. There was enough of it to get a
> partial number off to help us guess that it was the 1991 version which is the
> only one to use that specific part number.
>
> Also on the cabinet mounted TIP29 there is a brown lead that I believe is
> coming from the emitter to the top of a resistor sticking up on its end. That
> resistor is also toast and I am guessing the tip29 along with it.
>
> I am not sure if that is the 2.4 ohm resistor that is omitted in some of the
> other schematics or not. Its too burnt up to tell any color codes.
>
> I am curious as to what would have caused this kind of failure along with
> suggested replacement parts numbers.
>
> I also need verification as to the Identification of the "mystery" resistor.
>
> Any help would be appreciated.
> 73
>
Guess not
