[Elecraft] K3-PR10

[Jan Erik Holm]

Same here, I have a 6/6 Yagi stack on 10 and get more or less
the same reaction.

A built in preamp for 6 and 10m would have been super. As
soon as I get some time I will make one.

/SM2EKM
--------------------------
On 2012-10-26 18:02, Dave Hachadorian wrote:
> I have 6 elements on 10, and the K3 s-meter rests at S-0. When I
> turn the K3's preamp off, I can barely hear a change in antenna
> noise.
>
> Do you have a good choke at the Hex Beam feed point?  If not,
> maybe noise on the outside of your coax is going onto the
> antenna.
>
>
> Dave Hachadorian, K6LL
> Yuma, Arizona
>
>
>
>
>
> -----Original Message-----
> From: Dale Boresz
> Sent: Friday, October 26, 2012 3:00 AM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K3-PR10
>
> Fred,
>
> You must have an enviably quiet QTH (or a very poor antenna) if
> you find
> that the K3 can benefit from a preamp on 10m. I work a lot of
> weak
> signal CW on 10m with a simple Hex Beam up about 45 feet. Even
> with the
> Hex Beam's low gain, I can see the noise floor drop by about 9
> dBm when
> I disconnect the antenna from the K3 with the antenna pointed to
> the
> quietest part of the sky in the early morning hours when the band
> is
> clearly not open. These measurements were taken using both the P3
> and
> the K3's built-in AFV amd dBV measurement functionality.
>
> Based upon the above measurements, the band noise is already one
> and a
> half S-Units above the receiver's noise floor, so it seems to me
> that in
> terms of improving the signal to noise ratio, a preamp would be
> of
> little value.
>
> What am I missing here? (perhaps a quieter location  ;-)   )
>
> 73, Dale
> WA8SRA
>
>
>
> On 10/26/2012 4:51 AM, Fred Smith wrote:
>> Tim
>>
>> I can address this a little comparing my FTDX-5000MP and my
>> K3's the k3's
>> receivers are not up to the level of the Yaesu 5000 on the high
>> bands. But
>> quite the other way around on the low bands in IMHO but 6/10m
>> really needs a
>> good preamp for sure.
>>
>> 73,
>> Fred/N0AZZ
>
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