[Elecraft] KX3: use at <500-KHz

[Don Wilhelm]

Johnny,

Here is a related statement by Wayne made yesterday on the KX3 Yahoo 
group list.

-----------------------------------------------
I frequently use the KX3 in the BC band. I can clearly
copy all the same stations with the KX3 that I can hear using other AM-
capable radios at my QTH.

The KX3's receive sensitivity does fall off by design below about 1.5
MHz (as described below), but in many cases you don't need a lot of
sensitivity here due to high atmospheric noise. The exception, of
course, is if you're a serious BC-band SWL. In that case you might
want to consider a simple broadcast-band receiving converter using an
IF of say 7 MHz. The KX3 provides up to 9 built-in transverter bands,
one of which could be programmed for this purpose so the VFO would
still display the actual target frequencies.

73,
Wayne
N6KR

---------------------------------------------
I did not copy his "described below" text in the interest of brevity.  
Check the Yahoo group posts if you are interested in all the reasons.

73,
Don W3FPR
On 7/8/2012 8:46 AM, Johnny Siu wrote:
> Hello Edward,
>   
> For my K3, I got high S meter readings for local MF AM BC stations.  However, for my KX3, I bearly got a reading on the S meter for the same station.
>   
>
> TNX & 73,
>
>
> Johnny VR2XMC
>
> 寄件人︰ Edward R. Cole <kl7uw at acsalaska.net>
> 收件人︰ Art Nienhouse <ka9zap at gmail.com>; Elecraft at mailman.qth.net
> 傳送日期︰ 2012年07月8日 (週日) 3:48 PM
> 主題︰ Re: [Elecraft] KX3: use at <500-KHz
>
> Art,
>
> Thanks for your report.  Tonight I connected my 600m band inverted-L
> and found I could copy am BC stations local and in Anchorage 70-mi
> away.  I also could copy the ADIS station on 380-KHz and the RGPS
> beacon 3-mi away (usually a whopping -30 dBm on the SDR-IQ).  it
> registered about S4 on the KX3.
>
> So with a 20-dB preamp sensitivity probably can be restored on
> 630m.  The final question then is whether the KX3 is capable of
> transmitting there.  I would be satisfied with 0-10 dBm as that is
> all I need to drive my 100w amp (converted NDB transmitter).
>
> I have been received 2800 km away on 495-KHz.
>
> 73, Ed - KL7UW
>
> At 09:51 AM 7/7/2012, Art Nienhouse wrote:
>> Ed
>> My KX3 copies down to .540 ok but the frequency read out is not
>> accurate the s meter
>> report is s3 across the broadcast band the copy is ok however.
>>
>> Regards
>> Art
>> ka9zap
>>
>>
>>
>> On 7/7/2012 3:33 AM, Edward R. Cole wrote:
>>> I just tried reception on the am BC band and 500-KHz but the receiver
>>> seems deaf there.  There was mention of using the suto-tuner to
>>> improve reception below the BC band, but how is this
>>> accomplished?  Or is this waiting for firmware to implement?  How
>>> about Tx capability down there?
>>>
>>>
>
> 73, Ed - KL7UW, WD2XSH/45
> ======================================
> BP40IQ  500 KHz - 10-GHz  www.kl7uw.com
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