It's made by Vectronics and sold as the MFJ 202B.  The price is 
$79.95.  You can download the manual as a pdf from MFJ.  I know you 
can order it from H R O.    That's where I got mine.

73,

Dave, W7OQ

At 10:58 PM 8/9/2013, you wrote:
>Great, thanks Dave.  How much was it and from where did you
>obtain it? Jim WA6EKS
>
>  ----- Original Message -----
>From: Dave Basden <[log in to unmask]
>To: [log in to unmask]
>Date sent: Fri, 9 Aug 2013 21:55:42 -0700
>Subject: Re: Experience with Noise Bridges?
>
>I have a new one from MFJ that is really a reseller for another
>company.  It is RF protected up to 300 watts I believe.  A relay
>is
>used to take the unit out of the circuit.  I used it to tune my
>external tuner for minimum SWR.  I had to turn the RF gain way
>down
>to hear the change in noise.  The noise pulses, but it is hard to
>hear the change with the RF gain up and AGC turned on.  I haven't
>used it much, but it worked fine for me.
>
>73,
>
>Dave, W7OQ
>
>   At 03:33 PM 8/9/2013, you wrote:
>Ok, thanks Howard, I appreciate your information.  Will have to
>check with HRO to see if they even make them now.  73, Jim WA6EKS
>
>   ----- Original Message -----
>From: Howard Kaufman <[log in to unmask]
>To: [log in to unmask]
>Date sent: Fri, 9 Aug 2013 17:29:33 -0500
>Subject: Re: Experience with Noise Bridges?
>
>I used an old noise bridge 30 years ago.   It was very accurate
>with a deep
>null at the resonant point.  You couldn't transmit through it and
>it had RCA
>jacks.  I imagine they are better now.