[Lowfer] My Active Loop is apparently dead

[Douglas Williams]

Jay has forgotten more about this stuff than I will ever know. I would take
his advice.

D. KB4OER

On Thu, Nov 21, 2019 at 5:42 PM jrusgrove at comcast.net <jrusgrove at comcast.net>
wrote:

> Andy
>
> Measuring 12 VDC at the end of an open circuited cable doesn't tell you
> what it's doing under load. IIRC that 0 input impedance preamplifier of the
> Wellbrook loop drew a fair amount of current. Might be worth further
> investigation before giving up on it.
>
> Jay W1VD
>
>
> ----- Original Message -----
> From: Douglas Williams <williamsdoug1966 at gmail.com>
> Reply-To: Discussion of the Lowfer (US, European, & UK) and MedFer bands <
> lowfer at mailman.qth.net>
> To: Discussion of the Lowfer (US, European, & UK) and MedFer bands <
> lowfer at mailman.qth.net>
> Sent: 11/21/2019 5:14:24 PM
> Subject: Re: [Lowfer] My Active Loop is apparently dead
>
> ________________________________________________________________________________
>
> Andy,
>
> Unfortunately, if I recall correctly, the Wellbrook loop preamp is not user
> serviceable. If you have 12 volts at the end of the coax at the base of the
> loop, and you aren't hearing signals, one must conclude, as you did, that
> the issue is in the active preamp. IIRC, it is potted. :-(
>
> I think MFJ sells a similar active receiving loop, probably with a user
> serviceable preamp?
>
> D. KB4OER
>