[Milsurplus] GRC-106 receiver exciter query

[Michael Tauson]

Hi, Steve,

On 10/31/06, Steve Haney <tc0654 at mesh.net> wrote:

> Will work independently, but only puts out about 1/10 watt.

Hmmm ... I need to bump this up to around 2 watts.  A small but
effective gain block is indicated. <G>


> >Second, what's the output impedance of the exciter?

> My guess would be 50 ohms, but I could not find anything in the book, the
> coax used to connect the exciter and amp is 50 ohm but that seems like slim
> evidence.

It's better evidence than none.  It also seems to be the general trend
of thought.  50 ohms is good.  I like this.

> You do not like the sound of a 400 cycle vacuum cleaner?

Nah, it sucks.  I"m thinking more along the lines of a small peltier
or two and a couple of 12 volts.  Oh, and moving air around the back,
not the front.  Except for the fan location, I'm also thinking the
same alteration for a PRC-47 for SSB/RTTY on the lower bands since it
needs a serious bit of chill as well.

The amp I'm looking at is the one based on Motorola's Ap Note AN762
that Communications Concepts sells as a kit.  That followed by an SGC
autotuner aught to do just fine.  The PA's actually rated at 140 watts
(or 180 with a change in output transistors) but I'll probably run it
weak, in part so it will love me long time. <G>

BEst regards,

Michael, K3MXO/KH6