[Elecraft] K3 Question on KXV3B

[Wayne Burdick]

On May 22, 2015, at 12:41 PM, "N2TK, Tony" <tony.kaz at verizon.net> wrote:

> Does the preamp on the KXV3B replace the current preamp or is it in addition
> to?
> I assume it is in addition. How do you turn it on and off?

Preamp 2, on the KXV3B, is in addition to the normal preamp (preamp 1). But firmware will only let you turn on one or the other -- not both. When preamp 2 is ON, it totally dominates the noise figure equation, so there's no value in also turning on preamp 1. Preamp 2 has a gain of 20 dB, while preamp 1 has a gain of 10 dB.

To turn preamp 2 ON, you first have to enable it on one or more of the applicable bands using the CONFIG:PREAMP2 menu entry. You can enable it on 12, 10, and 6 meters.

Once preamp 2 is enabled, tapping PRE cycles through OFF/PRE1/PRE2 on the applicable band. Other bands will only show OFF/PRE1.

When PRE2 is selected, the PRE icon flashes slowly as a reminder. 

73,
Wayne
N6KR



> Tnx
> N2TK, Tony
> 
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Eric
> Swartz - WA6HHQ, Elecraft
> Sent: Thursday, May 21, 2015 12:12 PM
> To: Jim Lowman; elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K3 Question on KXV3B
> 
> Correct.
> 73,
> Eric
> /elecraft.com/
> 
> On 5/21/2015 8:49 AM, Jim Lowman wrote:
>> So, I assume that those of us who own the external preamp, don't need 
>> this new board?
>> 
>> 73 de Jim - AD6CW
>> 
>> On 5/21/2015 7:42 AM, Wayne Burdick wrote:
>>> The addition of the low-noise amplifier for 12-6 meters is the only
> change. 
>>> The module is compatible with either the K3 or K3S. The manual will 
>>> be posted when it's complete.
>>> 
>>> 73,
>>> Wayne
>>> N6KR
>>> 
>>> On May 21, 2015, at 7:22 AM, Bill Wiehe via Elecraft 
>>> <elecraft at mailman.qth.net> wrote:
>>> 
>>> 
>> 
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