Hi Mike, and fellow amp'ers.
You are keying a large mechanical relay on the Metron.
Sounds like you are not sinking enough current through
your interface. The PTT jack on the Metron shorts to ground to make it key up.
Anytime the main
power switch
on the Metron is on, you will be pulling some current, even when not keyed up.
A car battery
and a 15 amp
charger will power the Metron nicely on SSB. Caution;
anything over about 70watts of drive will burn up the resistor network on the
input. I hope
this helps.
(((73)))
Phil, K5PC
Phil Clements
410 VZ CR 4903
Ben Wheeler, TX 75754
----- Original Message -----
From: "Mike K9MI" <mdbrown@iquest.net>
To: <amps@contesting.com>
Sent: Sunday, March 18, 2001 6:12 PM
Subject: [AMPS] Metron MA 1000B - help needed
>
> A friend of mine loaned me this mobile amp that he no
> longer has the paperwork for. I am trying to use it
> with my Kenwood 850 and powering it with a battery for
> the time being. My only other amp experience was with
> an LK 500. I used the Ameritron amp interface with the
> LK 500, and am trying to use it with the Metron amp.
> The Metron has one wire coming from the back that is
> for the relay. I guess my main question is, should this
> plug (male rca) have 12 volts coming from it ? It doesn't.
> The relay jack on the LK 500 did have 12 volts output.
> There is a place to put 12 volts on the Ameritron interface,
> and I tried that, and the amp does key. Problem is, when
> I unkey the rig, the output goes to zero on the amp, but
> the amp is still drawing between 5-10 amps, and the rig
> is not getting back into receieve mode. But, as soon as
> I pull the 12 volts off the Ameritron interface, then it
> does go back to receive.
> So, I guess thepunch line is, does this sound like a bad
> relay in the amp, or am I just not cabled correctly for
> it to work with my 850? When the amp was keyed, I put enough
> drive into it to see it put out 500 watts, so the amp itself
> does work.
> I believe this amp was purchased new by my friend back in
> the mid 80's, and I think it is rated at around 600 watts
> out.
>
> Thanks... Mike K9MI
>
>
>
>
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>
>
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