I read that folks have successfully used the Clifton buffer amp.
Certainly worth a try. Others have indicated only about 6 dB of gain
is needed.
The software I use for my RSP-1 allows RF Gain changes. Thus with the
lower IF output of my K3S, I just raise the gain of the RSP-1 via the
software. I've never considered the SDR receivers of that type to be
very precise with regard to "calibration". Although some seem to think
they can split hairs on a mosquito with the level and frequency accuracy
of the receivers. I do not consider them of instrumentation quality,
thus anything +/-10 dB is deemed satisfactory. Likewise the same with
frequency accuracy. Others may have different experiences with
different receivers.
73
Bob, K4TAX
On 10/4/2019 6:34 PM, Fred Massey wrote:
A friend of mine, Tim AB4B, suggested that I might need a buffer amp
to keep the IF being pulled down by the sdr. DXEngineering sells the
Clifton Z10000. That adds about 6db of gain, but maybe the buffering
that it does has an even bigger effect.
On Fri, Oct 4, 2019 at 2:18 PM Bob McGraw K4TAX <rmcg...@blomand.net
<mailto:rmcg...@blomand.net>> wrote:
In a word, YES. I find that to be true with my K3S as well as other
brands/models of radios. Thus you'll need about 20 dB of gain in
the
form of a preamp between the IF output and the QSR receiver.
73
Bob, K4TAX
On 10/4/2019 12:57 PM, Fred Massey wrote:
> Some. I was planning on sending an email to Elecraft support
with the s/n
> of my K3s to see if I needed the mod. The difference I’m seeing
in signal
> strength is about 20+ dB. Is it normal for the if-out to be
weaker than a
> direct connection to the antenna?
> 73,
> Fred
> AE4ED
>
> On Fri, Oct 4, 2019 at 12:44 PM Don Wilhelm
<donw...@embarqmail.com <mailto:donw...@embarqmail.com>> wrote:
>
>> Fred,
>>
>> Have you looked the K3 IF Output mod?
>>
>>
https://ftp.elecraft.com/K3/Mod%20Notes%20Alerts/IF_Output_Buffer_Gain_Mod_Rev_A.pdf
>>
>> If you don't have the 13k SMD resistor or a 1/8 watt 13k
resistor, you
>> can order the kit from Elecraft.
>>
>> 73,
>> Don W3FPR
>>
>> On 10/4/2019 1:24 PM, Fred Massey wrote:
>>> Good afternoon Wes and all,
>>>
>>> If I connect the antenna directly to the QSR-1, I get the same
signal
>> level
>>> as the K3s. But, when I connect to the QSR-1 to the IF-out,
the signal
>> is
>>> about 4 s-units less.
>>>
>>> Any ideas...anyone?
>>>
>>> Fred
>>>
>>> On Thu, Oct 3, 2019 at 4:14 PM Wes <wes_n...@triconet.org
<mailto:wes_n...@triconet.org>> wrote:
>>>
>>>> I use an SDR-IQ on the i-f output on my (very) early K3S. it
works
>> fine.
>>>> IIRC,
>>>> always a dubious proposition, I did the mod on my original K3
and it
>>>> worked well
>>>> too without any additional amplification. I think you have
another
>>>> problem.
>>>>
>>>> Wes N7WS
>>>>
>>>> On 10/3/2019 2:01 PM, Fred Massey wrote:
>>>>> Good afternoon,
>>>>>
>>>>> I have successfully connected my QSR-1 to my K3s if-out, and
>> immediately
>>>>> noticed the signal strengths showing on the QSR-1 were much
weaker. I
>>>>> probably have an early K3s, so the if-out signal strength is
even
>> weaker.
>>>>> Any recommendations at a good preamp to use? It seems like
20db is
>> what
>>>> I
>>>>> need:
>>>>>
>>>>> 73,
>>>>> Fred
>>>>> AE4ED
>>>> ______________________________________________________________
>>>> Elecraft mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Elecraft@mailman.qth.net
<mailto:Elecraft@mailman.qth.net>
>>>>
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list:
http://www.qsl.net/donate.html
>>>> Message delivered to fhmas...@gmail.com
<mailto:fhmas...@gmail.com>
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Elecraft@mailman.qth.net
<mailto:Elecraft@mailman.qth.net>
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list:
http://www.qsl.net/donate.html
>>> Message delivered to donw...@embarqmail.com
<mailto:donw...@embarqmail.com>
>>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
<mailto:Elecraft@mailman.qth.net>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to rmcg...@blomand.net
<mailto:rmcg...@blomand.net>
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
<mailto:Elecraft@mailman.qth.net>
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to fhmas...@gmail.com <mailto:fhmas...@gmail.com>
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
