[Lowfer] OKAY; so maybe I need a loop

[Paul Daulton]

Specs say 2-30mhz. for lowfer may need different core for output 
transformer.

Great circuit I have used it many times, good price. I have similar amp from 
TENTEC which uses MMIC. Nice building block.

Dex has lots of neat stuff.. Go for it!

Paul k5wms
----- Original Message ----- 
From: "JJ" <jhjesse at verizon.net>
To: "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands" 
<lowfer at mailman.qth.net>
Sent: Tuesday, July 13, 2010 11:09 AM
Subject: Re: [Lowfer] OKAY; so maybe I need a loop


> 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
>
> Mitch Powell wrote:
>> Andy:
>>
>> Take a look at the following two web sites - and maybe get an idea of 
>> combining some of
>> the techniques from each one:
>> http://members.shaw.ca/ve7sl/burhans.html
>>
>> Steve and I have been using the "active" one with the Burhans preamp - 
>> for quite a few
>> years - I have logged NDBs down to the South Pacific and many South 
>> American countries,
>> as well as the Azores..... it is very, very quiet, and might suit your 
>> requirements.
>> I have a 12 footer , and an 8 footer - and both work equally well.
>> If you're concerned about the preamp - I can send you one !
>>
>> The other site is Lyle's K0LR
>>
>> http://www.qsl.net/k0lr/simple-loop/Simple-Loop.htm
>>
>> and though he just put a fixed capacitor across the loop - it shows how 
>> simple it is to make one from coax - - or some remote relays and 
>> capacitors ( see W1TAG web site for his remote relay tuning technique. 
>> It worked perfectly for me - until I added a stepper motor circuit with 
>> big variable capacitor for remote tuning.   Still using after 5 years.
>>
>> Let me know about the preamp.
>>
>> 73
>>
>> Mitch
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>>
>
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