I'll have to get someone to look, but the mfj I have is exactly like the 
vectronics and does have a bypass mode.  AS I recall, I got into a 
similar discussion with h r o and the mfj doesn't say that it does, but 
it does!!!!
73
Butch
WA0VJR
Node 3148
Wallace, ks.


On Sat, 10 Aug 2013, Bob, K8LR wrote:

> I thought that the MFj202B was a noise bridge more like the palimar bridge
> where you have a resistance and reactance control and it does not have a
> bypass mode.
>
> Bob, K8LR, [log in to unmask]
>
> ----- Original Message -----
> From: "Butch Bussen" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Saturday, August 10, 2013 3:04 PM
> Subject: Re: Experience with Noise Bridges?
>
>
> I don't recall the mfj number, but it is exactly the same box.  I have
> two of them.  I did eventually get one from vectronics, but took a long
> time.  It really works great for tuning my screw driver.  It bypasses
> itself if you forget and leave it on, but I've only done that once or
> twice.  The real advantage with this type is you just leave it in line,
> couldn't do that with the palamars or the other one I use to have.
> 73
> Butch
> WA0VJR
> Node 3148
> Wallace, ks.
>
>
> On Fri,
> 9 Aug 2013, Bob, K8LR wrote:
>
>> Hi Jim,
>>
>> I use a Vectronics vec512 noise bridge all of the time and it works GREAT!
>> Unfortunately, it is currently out of stock and I don't know if Vectronics
>> which is now part of MFJ will make any more units.  The VEC512 has two
>> advantages over any other noise bridge.  First, you can keep it in line
>> while you transmit as the unit has a relay that bypasses the noise bridge
>> when the bridge is offas you can run up to 300 watts through it.
>> Therefore,
>> I have my noise bridge hooked between my transceiver and my amplifier
>> rather
>> than after the amp.
>>
>> The second advantage is that the bridge is set to 50 ohms and when you
>> null
>> out the pulsing hissing noise with an antenna tuner in your receiver,
>> you'll
>> have a 1-1 swr all of the time unless you can't get a deep null.
>>
>> Bob, K8LR, [log in to unmask]
>>
>> ----- Original Message -----
>> From: "Jim Gammon" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Friday, August 09, 2013 4:26 PM
>> Subject: Experience with Noise Bridges?
>>
>>
>> Not to be confused with LLOYD or Jeff Bridges.  I  am wondering
>> if anyone on the list owns or has worked with a noise bridge? I
>> would like to know how useful, and accessible they are and their
>> capabilities in determining resonance points for antennas.
>> Thanks and 73, Jim WA6EKS
>>
>>
>
>