the Commander II has a single meter with in internal resistance of 500 ohms.
There may be a resistor added in series inside the meter. An Ameritron AL-1XXX
meter should be the same physical size and take the meter scale directly. The
resistance can be matched with a resistor inside to make it 500 ohms. The
meter should be less than 500 ohms so that is good.
-----Original Message-----
From: Mike & Becca Krzystyniak <k9mk@flash.net>
To: gudguyham <gudguyham@aol.com>; k2ztdx <k2ztdx@gmail.com>
Cc: amps <amps@contesting.com>
Sent: Mon, Oct 22, 2018 12:37 pm
Subject: RE: [Amps] Commander II Amp Parts
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Thanks to everyone for replying on this topic. Confirming the metering in my
Commander II was made by Prime. The Commander II is a single multimeter where
most if not all the HF1250/2500 series amps were dual meters. Is the concensus
that Commanders HF metering are likely the same physical device from Prime? By
physical I mean the X-Y of the bexel opening? Sans possible internal resistor
values etc. Or for the Ameritron substitute, was there any mechanical work in
substituting those meters? Thanks again… 73 Mike K9MK From:
gudguyham@aol.com [mailto:gudguyham@aol.com]
Sent: Monday, October 22, 2018 9:55 AM
To: k2ztdx@gmail.com; k9mk@flash.net
Cc: amps@contesting.com
Subject: Re: [Amps] Commander II Amp Parts I've replaced bad Commander meters
with Ameritron meters. They are the same meter physically and the scale should
fit but you would have to check the resistance of the meter to see if it is the
same. If I recall the meter resistance on the Commander amps is 500 ohms and I
think the Ameritron meters are a little less. Being less is OK so all you need
is a series resistor that can be put inside the meter. I have opened Ameritron
meters and they have added resistance to suit their circuit. I suppose you can
add accordingly to make it work for the Commander. But the Commander meters
are Prime and so are the Ameritron meters.
-----Original Message-----
From: Jay Sturtevant <k2ztdx@gmail.com>
To: Mike & Becca Krzystyniak <k9mk@flash.net>
Cc: Amplifier Reflector <amps@contesting.com>
Sent: Mon, Oct 22, 2018 10:34 am
Subject: Re: [Amps] Commander II Amp PartsI purchased a Commander HF 2500 in
the 90s and bought new replacements
from Pat for the unique components.
I unwrapped one of the meters and couldn't find a part number, however, it
was marked, "Prime, Cleveland Ohio". The note written to myself with the
meter states , " Pat told me the two meters are identical, but have
different face plates (scales).
I hope this helps.
Jay, K2ZT
On Fri, Oct 19, 2018, 10:31 AM Mike & Becca Krzystyniak <k9mk@flash.net>
wrote:
> Greetings,
>
> I'm looking for a meter for a Commander II amp.
> Somehow mine has developed a cracked lense.
>
> Anyone have a meter or maybe an amp they're parting out?
> Or the OEM part number??
>
> Thanks in advance.
>
> 73's Mike K9MK
>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
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