Hi Tom, If I'm right, you have one of these 590s?  Can you, or maybe anyone here, make a suggestion?  I don't understand plenty of the functions on there and right now, I can't make it transmit on 75 meters.  I don't know what I did nor how to undo it.  I push buttons for hours and it just doesn't work.

Thanks and 73.

The Other Howard, WA9RYF
----- Original Message ----- 
From: "Tom Behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, January 01, 2014 6:35 PM
Subject: Re: Using MFJ Noise Bridge To Determine Antenna Resonant Frequency


> Thanks, Dave.
> 
> I'll try to get into the habit of turning it off when it's not in use,
> basically because it's the safest thing to do.  But, it's good to know that
> the world probably won't come to an end, and I probably won't let the smoke
> out of anything if I should happen to forget on occasion.
> 
> Tom Behler: KB8TYJ
> 
> 
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Dave Basden
> Sent: Wednesday, January 01, 2014 4:25 PM
> To: [log in to unmask]
> Subject: Re: Using MFJ Noise Bridge To Determine Antenna Resonant Frequency
> 
> Hi Tom,
> 
> If the noise bridge is between the TS-590 and the amp, you shouldn't have to
> worry about running too much power into it.  It's only when the bridge
> follows the amp that you would have to make sure the switch is off.
> 
> 73,
> 
> Dave, W7OQ
> 
> At 10:43 AM 1/1/2014, you wrote:
>>Lloyd:
>>
>>I think Howard and Lowell have answered this question, if I'm 
>>interpreting their posts correctly.
>>
>>Apparently, if the switch on the noise bridge is off, one can use the 
>>amplifier without any risk to the device.
>>
>>Tom Behler: KB8TYJ
>>
>>
>>-----Original Message-----
>>From: For blind ham radio operators 
>>[mailto:[log in to unmask]]
>>On Behalf Of Lloyd Rasmussen
>>Sent: Wednesday, January 01, 2014 12:12 PM
>>To: [log in to unmask]
>>Subject: Re: Using MFJ Noise Bridge To Determine Antenna Resonant 
>>Frequency
>>
>>I would put the noise bridge in the line between the transceiver and 
>>the amplifier.  This would prevent it from seeing your 600 watts.  I 
>>don't know about the on-off switch.
>>
>>
>>
>>Lloyd Rasmussen, Kensington, MD
>>http://lras.home.sprynet.com
>>-----Original Message-----
>>From: Tom Behler
>>Sent: Wednesday, January 01, 2014 11:40 AM
>>To: [log in to unmask]
>>Subject: Re: Using MFJ Noise Bridge To Determine Antenna Resonant 
>>Frequency
>>
>>Bob:
>>
>>Ok on not using both the manual and internal tuners together. ... This 
>>is what I suspected.
>>
>>Ok also on confirming Howard's procedure for determining the resonant 
>>frequency of an antenna using the MFJ noise bridge.
>>
>>Now, I have one more question:
>>
>>Here in the home shack, am I correct in saying that I'm ok with keeping 
>>the noise bridge in the circuit at all times, as long as I am 
>>absolutely 100% sure to turn the noise bridge off before transmitting 
>>with 100 watts, and especially before tuning and then using my AL811H 
>>amplifier?  The amp puts out about 600 watts, and I know the Noise 
>>Bridge only handles 300 watts.  I realize that the noise bridge has a 
>>protective circuit, but I have learned over the years not to totally trust
> those protective circuits.
>>
>>Tom Behler: KB8TYJ
>>
>>
>>-----Original Message-----
>>From: For blind ham radio operators 
>>[mailto:[log in to unmask]]
>>On Behalf Of Bob, K8LR
>>Sent: Wednesday, January 01, 2014 11:20 AM
>>To: [log in to unmask]
>>Subject: Re: Using MFJ Noise Bridge To Determine Antenna Resonant 
>>Frequency
>>
>>Tom,
>>
>>The noise bridge works very well in getting your SWR down to 1-1.  The 
>>really nice thing about the MFJ212 and the VEC512 is that you can 
>>transmit with the noise bridge in line with a power of up to 300 watts.
>>
>>I would not use your 480 internal tuner if your running an external tuner.
>>That combination could cause some really high voltages at the antenna 
>>connector that could pop some components.
>>
>>Howard has got it right on how to find a resonant frequency with the 
>>noise bridge.
>>
>>Bob, K8LR, [log in to unmask]
>>
>>----- Original Message -----
>>From: "Tom Behler" <[log in to unmask]>
>>To: <[log in to unmask]>
>>Sent: Wednesday, January 01, 2014 9:49 AM
>>Subject: Using MFJ Noise Bridge To Determine Antenna Resonant Frequency
>>
>>
>>Hi, again, everyone.
>>
>>
>>
>>Sometime late last Summer, someone on the list suggested that an MFJ 
>>212 Noise Bridge might be useful for determining the resonant frequency 
>>of an antenna, even one that might be resonant outside the ham bands.
>>
>>
>>
>>Is this possible, and, if so, how exactly might that be done?
>>
>>
>>
>>Tom Behler: KB8TYJ