Hi Fern,
The best real world test is that the noise level should rise by 8-10 dB
when you connect an antenna to the radio. If it doesn't, your ability to
receive weak signals is limited by internal noise of the radio.
Obviously, this very practical test is location specific. But if you
live in a quiet QTH, noise performance of the front end becomes
increasingly important.
73, Jim K9YC
On Wed,1/4/2017 2:58 PM, Fern Rivard wrote:
I have an early K3 and don’t see any need for a pre-amp for it on any
of those bands.
I just checked the sensitivity with my service monitor to verify that.
73 from Fern VE7GZ
-----Original Message-----
From: Jim Brown
Sent: Wednesday, January 04, 2017 12:37 PM
To: amps@contesting.com
Subject: Re: [Amps] FCC Denies Expert Linears' Request for Waiver of
15 dB Rule
On Wed,1/4/2017 11:02 AM, Catherine James wrote:
> Modern HF rig plus a transverter
The Elecraft K3, K3S, and KX3 are excellent performers on 6M, although
the K3 needs a preamp for 12, 10, and 6M. They sold an outboard unit for
the K3, but it's built into the K3S and KX3.
The major reason why transverters are the popular option above 6M is
that even most of the dedicated VHF/UHF transceivers weren't very good.
Anyone who works those bands seriously uses transverters with very low
noise preamps.
73, Jim K9YC
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