[600MRG] Noise issues.

[Brian, WA1ZMS]

Don't have datasheet in front of me, but the gain-bandwidth product should be at least a few MHz. So higher freq gives lower gain, but it solves the "balun issue" very well.

-Brian, WA1ZMS/4
iPhone

On Mar 11, 2014, at 8:07 PM, "Kenneth G. Gordon" <kgordon2006 at frontier.com> wrote:

> On 11 Mar 2014 at 19:19, Brian, WA1ZMS wrote:
> 
>> My 2cents is to build one of the 'ZMS amps for the 600m loop. You can adjust
>> the gain by changing the feedback cap. But the best point is that it will
>> give you a nice "active balun" that should do a great job for a ballanced
>> loop to a single- ended input in coax. 
> 
> What's the upper limit of the OP-27 frequency?
> 
> ken W7EKB