Ken,
The PT-2 is a reasonably good preamp for 1.8, I have used mine for years.
It requires a little mod or two however, to keep stray noise out. When I
first started using mine, I was picking up an extra 2 S-units of noise,
which I finally traced to ingress of noise on the preamps AC line cord.
Opening the unit up revealed the problems (poor routing of the input/output
connector wires right next to the line cord).
1) Replace the internal I/O wires with coax.
2) Wrap the line cord a few turns onto a high mu toroidal core, to make a
common mode choke at the outside of the box, just as the AC line cord enters
the back.
A good preamp after the mods --
73,
Hal
N4GG
> >Subject: Topband: Ameco PT-2 Preamp
>
> I have an old Ameco PT-2 preamp I'm thinking of using on the lowabands.
>I'm curious if anyone has used this particular model in the 1.8 Mhz to 3.5
>Mhz range and if it's any good. Second, the manual mentions the ability to
>add a second receiver. However, a modification sheet is needed from Ameco.
>Has anyone attempted this modification or do you have the modification
>sheet?
>
>73
>Ken K4ZW
>
>
>
>
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