[AMPS] Re:

[Phil Clements]

For those of us not so technically inclined, RF Applications has done
all
of the suggestions below for us, even for Bird line sections. They
even
factory modified my P-3000 to 5 kw. By the time you buy a Bird 43 with
2 slugs and the peak reading adapter, the prices are about the same.
(The 2nd Bird slud is necessary to obtain  accurate readings  on 160
meters)

I find RF Applications to be a fine company with fine products. They
are
constantly upgrading their software, and make it available to their
customers.

(((73)))
Phil, K5PC

>>The problem is that if you try to create a good hold time by simply
>>making the RC time constant very long, it takes an age for the meter
to
>>drift back down again. It becomes far too slow to follow speech for
>>example.
>
>It rather depends what you consider useful. The 43P circuit takes
forever to
>fall back and just sits at the maximum reading when used with SSB.
This is
>good in contests as it stops the operator continually trying to "talk
up"
>the meter. What it really needs is some DC-DC converter to prevent
its
>excessive use of PP3s and a time out circuit in case it gets left on
>overnight. There is no way of knowing what the chip is on the PCB as
it is
>potted.
>
>Nowadays, this seems a good application for a microcontroller that
could not
>only do the PEP but also linearise the scale using a look up table
allowing
>any appropriate meter to be used with one of the readily available
Bird line
>sections. The meter could even set an overdrive alarm.
>
>A useful addition would be the same circuit applied to amplifier
>screen/anode/grid current metering.
>
>
>
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>
>


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