[Elecraft] Preamps in K3s

[donovanf at starpower.net]

Hi Jim, 


Fred Cady's excellent K3 Manual, 3rd edition, spells it out in detail in Table 7-3. 


"The firmware prevents you from making these choices. 
The hardware cannot handle a 30 dB preamplification." 


73 
Frank 
W3LPL 




----- Original Message -----

From: "Jim Miller" <jtmiller47 at gmail.com> 
To: "Bob McGraw K4TAX" <rmcgraw at blomand.net> 
Cc: "Elecraft Reflector" <elecraft at mailman.qth.net> 
Sent: Saturday, June 10, 2017 3:31:09 PM 
Subject: Re: [Elecraft] Preamps in K3s 

I likewise read all info in the K3s manual. Your interpretation is one that could be true but it isn't spelled out. 

73 

Jim ab3cv 

On Jun 10, 2017, at 11:22 AM, Bob McGraw K4TAX <rmcgraw at blomand.net> wrote: 

I had to refer to the manual for this. Pre 1 is available for all bands and has 10 dB gain. Pre 2 is available for 12/10/6 M and has 20 dB gain. They are not stacked. 

Bob, K4TAX 


Sent from my iPhone 

> On Jun 10, 2017, at 9:48 AM, Jim Miller <jim at jtmiller.com> wrote: 
> 
> I'm confused a bit about how the Preamps in my K3s work. 
> 
> When Preamp2 is engaged are the preamps stacked for a total of 30db 
> additional gain or does the Preamp2 engagement disengage Preamp1 for a 
> total of 20dB? 
> 
> Or perhaps they are both engaged for a total of 20db with Pre2 boosting 
> over Pre1 by 10db? 
> 
> 73 
> 
> jim ab3cv 
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