[ICOM] Amp tuning

[Max Harelik]

I use the MFJ 704 at the home QTH. It shuttles among my IC-706Mk2G, 
TS-530S. TS-940 and TS-440 to drive my SB-200. Presaently, I just change 
adapter cables, but am working on a central switch box. It is very 
effective.

73,
Max, K5OVW

LARRY M WASSMAN wrote:

> You may also want to check out the voltage on the PPT line between the 
> amp and the Pro III. Make sure that the voltage is within specs. You 
> may want to consider getting a buffer like the Ameritron ARB-704 just 
> to be safe. 73 Larry
>
>> From The Real Wizard of OZ W3OZ
>
> www.w3oz.com
>
>
>
> From: "Ed Senior" <eseniors at earthlink.net>
> Reply-To: ICOM Reflector <icom at mailman.qth.net>
> To: <icom at mailman.qth.net>
> Subject: Re: [ICOM] Amp tuning
> Date: Thu, 14 Sep 2006 08:50:28 -0700
>
> Hi Bob,
>
> You will probably get a lot of responses to your questions!
>
> 1. Your rig's built in tuner will NOT tune your antenna
> "through the amp." But if your amp is working properly,
> its input should present a low SWR to your rig. Most
> likely, you can (and should) switch your rig's tuner OFF
> when driving the amp.
>
> 2. You MAY need a high-power antenna tuner between
> your amp and the antenna, depending on whether or not
> your amp's output can be adjusted to handle the load
> presented by the antenna. Many amps can handle load
> SWRs up to 3:1 with no problem.
>
> 3. People usually use CW to tune their amps. (Start at a
> reduced power level, and go to full drive only for the
> last bit of fine tuning!)
>
> If you have any good buddies in your area who are used to
> tuning up big amps, you might invite one over to show you
> how it's done. (Expen$ive mistakes are possible, alas.)
>
> 73 and good luck,
>
> Ed, W6LOL
>
> ----- Original Message -----
> From: "Bob Bennett" <bbbnntt at optonline.net>
> To: <icom at mailman.qth.net>
> Sent: Wednesday, September 13, 2006 7:09 PM
> Subject: [ICOM] Amp tuning
>
>
> > I have an Icom 756 Pro III and just hooked it up to my old Detron
> > GLA-1000 amp. I have two questions:
> >
> > 1. The station has a g5r3 that the Icom automatic tuning feature has
> > been tuning quite well. Now that I have the amp do I need to use
> > another tuner between the amp and the antenna, or does the Icom
> > tuner tune the G5RV through the amp. The SWR reading on the
> > radio’s meter is showing an SWR between 1.0 and 1.5. The meter on
> > the MFJ Versa Tuner (coax direct) in line after the amp is showing
> > an SWR as hi as 3.0.
> > 2. When tuning my amps, I have been tuning them using FM. I have
> > never been confident with hellllloooooo on ssb and my whistling
> > skill is as bad as my singing. It this (FM tuning, not singing)
> > harmful to the amp?
> >
> > Bob/KG2RP
> >
> >
> >
>
> ----
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> Icom Users Net: Sundays, 1700Z, 14.316 MHz
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>
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
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>