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KX3: use at <500-KHz

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Edward R Cole

KX3: use at <500-KHz

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
EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
DUBUS Magazine USA Rep [hidden email]
"Kits made by KL7UW" http://www.kl7uw.com/kits.htm
======================================
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Johnny Siu

KX3: use at MF and <500-KHz

Hello Edward,

I observe the same for MF broadcast band here. I can get big signal for local 783KHz AM BC station in my K3 but not KX3.

TNX & 73,

Johnny VR2XMC

________________________________
寄件人︰ Edward R. Cole <[hidden email]>
收件人︰ [hidden email]
傳送日期︰ 2012年07月7日 (週六) 4:33 PM
主題︰ [Elecraft] KX3: use at <500-KHz

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
EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
DUBUS Magazine USA Rep [hidden email]
"Kits made by KL7UW" http://www.kl7uw.com/kits.htm
======================================
______________________________________________________________
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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Edward R Cole

Re: KX3: use at <500-KHz

In reply to this post by Edward R Cole

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?
>>
>>

Johnny Siu

KX3: use at <500-KHz

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 <[hidden email]>
收件人︰ Art Nienhouse <[hidden email]>; [hidden email]
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:

73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
DUBUS Magazine USA Rep [hidden email]
"Kits made by KL7UW" http://www.kl7uw.com/kits.htm
======================================
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Don Wilhelm-4

Re: KX3: use at <500-KHz

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 <[hidden email]>
> 收件人︰ Art Nienhouse <[hidden email]>; [hidden email]
> 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
> EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
> DUBUS Magazine USA Rep [hidden email]
> "Kits made by KL7UW" http://www.kl7uw.com/kits.htm
> ======================================
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net/
> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Johnny Siu

KX3: use at <500-KHz

Thanks, Don, I don't realise KX3 is less sensitive than K3 in listening to loocal AM BC stations.

TNX & 73,

Johnny VR2XMC

________________________________
寄件人︰ Don Wilhelm <[hidden email]>
收件人︰ Johnny Siu <[hidden email]>
副本(CC)︰ Edward R. Cole <[hidden email]>; "[hidden email]" <[hidden email]>
傳送日期︰ 2012年07月8日 (週日) 9:22 PM
主題︰ Re: [Elecraft] KX3: use at <500-KHz

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 <[hidden email]>
> 收件人︰ Art Nienhouse <[hidden email]>; [hidden email]
> 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
> EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
> DUBUS Magazine USA Rep [hidden email]
> "Kits made by KL7UW" http://www.kl7uw.com/kits.htm
> ======================================
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net/
> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net/
> Please help support this email list: http://www.qsl.net/donate.html