[600MRG] MF kenwood sensitivity question on QRP-L

[Warren K2ORS]

Kenwood TS-140 RX mod:
http://www.radiomods.co.nz/kenwood/kenwoodts140.html
  or same mod at:
http://betatestspot.blogspot.com/2014/05/kenwood-ts-140s.html

73 Warren


On 10/30/2014 12:41 PM, John Langridge wrote:
> Thanks Ken.  I will hang loose for a bit to see if there are other comments on this before passing the info on to him.  I don't mind doing a little legwork on this to help a potential suitor for what we do.
>
> 73 and thanks again!
>
> John XIQ
>
>
>
> ________________________________
>   From: "kgordon2006 at frontier.com" <kgordon2006 at frontier.com>
> To: "600mrg at w7ekb.com" <600mrg at w7ekb.com>
> Sent: Thursday, October 30, 2014 11:00 AM
> Subject: Re: [600MRG] MF kenwood sensitivity question on QRP-L
>
>
> On 30 Oct 2014 at 8:38, John Langridge wrote:
>
>> the following was posted on QRP-L... anyone know the answer? guessing
>> its just a matter of getting that attenuator out of line.
>
> Yes. I have two TS-940s. The TS-940 has a 20 dB attenuator which is switched in when
> the tuning goes below 1500 Khz. There is at least one fairly common mod to bypass
> that attenuator.
>
> It is my understanding that many (most?) modern transceivers include such an
> attenuator to help prevent overload by local BC stations when tuning in that range.
>
> I know that when I have used a TS-940 to listen below 1500 Khz, it is very obvious when
> that attenuator in active.
>
> I wouldn't doubt that the TS-140 also has the same "feature".
>
> I thnk that mods.dk MAY have the necessary information on how to defeat this
> "feature". In any case, judicious searching on the internet will eventually find it.
>
> Ken W7EKB
>
>
>
>
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