[Lowfer] OKAY; so maybe I need a loop

[Mitch Powell]

Jon:
I have built that preamp - and it works great but the impedance of the "octoloop" and other single turn loops is in the order of ohms - and the small transformer in the front end of the Burhans ( I get them at Mouser ) require a step up - and also allow you to roll-off the frequency response just above the 500 kHz - and kill broadcast intermods to a degree.

I do use a version of that preamp you suggest - for my 16 turn/remotely tuned loop - and it's perfect.
I always appreciate a new circuit  - just makes me want to get the soldering iron out again.

Thanks

Mitch
On 2010-07-13, at 12:09 PM, JJ wrote:

> What about adding this version of the W7IUV amp to the "simple loop" for LF?
> 
> http://www.kitsandparts.com/rfamp1.1.php
> 
> I've been thinking of giving this a go.  $8 for a board and parts is 
> cheap enough.
> 
> Jon W1JHJ
>