And the Elecraft KPA500.
Bob
On Tue, Jan 25, 2011 at 9:48 PM, Joe Subich, W4TV <lists@subich.com> wrote:
>
> > Of course, it is a practical impossibility to shut out that segment
> > and still allow full 10-meter coverage.
>
> Except for those amplifiers that use a microprocessor controller with
> frequency counter. The controller can be programmed to lockout when
> detecting RF between 26 and 28 MHz. If the amplifier is also designed
> so that it is impossible to operated with the processor defeated the
> design will pass muster under the new rules (the SPE Expert, THP 1.5Kfx
> and 2.5Kfx are all examples of this approach).
>
> 73,
>
> ... Joe, W4TV
>
>
> On 1/25/2011 11:40 PM, Glen Zook wrote:
> > Both the HR-2510 and HR-2600 Uniden can be "opened" by cutting a trace on
> the circuit board and inserting a resistor. This changes the coverage from
> 28.000 MHz to 29.6999 MHz to 26.0 MHz to 29.6999 MHz. Uniden tried, at
> least for those units sold in the United States, to discourage this by
> putting a layer of epoxy over that area of the circuit board. But, 10
> seconds with an Xacto knife or razor blade took care of the expoxy.
> >
> > As for 10 meters on linear amplifiers: The FCC did remove the ban on
> 10-meter operation for certification. However, there is a "gotcha" in the
> fact that a certified amplifier cannot be capable of amplifying frequencies
> between 26.0 MHz and 28.0 MHz. Of course, it is a practical impossibility
> to shut out that segment and still allow full 10-meter coverage.
> >
> > Glen, K9STH
> >
> > Website: http://k9sth.com
> >
> >
> > --- On Tue, 1/25/11, Fuqua, Bill L<wlfuqu00@uky.edu> wrote:
> >
> > I have a brand new in the box HR-2600 10 meter all mode that I put up on
> eHam for sale and they took the advertisement off. An email telling me that
> it was too easily converted to 11 meters and so banned from sale. You have
> to make a crystal change and tweak a few pots to get it on 11 meters I would
> guess, it is not an easy job by any means.
> >
> > My point is that even though the FCC changed the rules it seems no one is
> about to change their practice.
> >
> >
> >
> > _______________________________________________
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> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> >
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