[Elecraft] K3 Future Factory Hardware Updates; + New beta f/w release 3.27

[Joe Subich, W4TV]

Eric, 

> Please note that the last item, the IF Output Buffer Gain mMod, 
> is slightly different than the similar N8LP mod some have been 
> performing on their K3s independently. We determined that only 
> one value needs to change to implement the gain increase for 
> the IF output. We are changing R8 from 1K ohms to 13K ohms.  

Are you saying it is not necessary to increase the current in 
J309 to handle the higher signal levels?  

With this change, what is the transfer gain/loss from the antenna 
input to the IF output with the IF output terminated in 50 Ohms? 

73, 

   ... Joe, W4TV 
 


> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Eric 
> Swartz - WA6HHQ, Elecraft
> Sent: Tuesday, August 25, 2009 1:53 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K3 Future Factory Hardware Updates; + 
> New beta f/w release 3.27
> 
> 
> Hi Roy,
> 
> As of today, we have made the following enhancements to all 
> K3s leaving 
> the factory:
> 
> K3 VFO TUNING NOISE REDUCTION  (requires f/w 3.25 or later)
> K3 AUTOMATIC FRONT END PROTECTION  (1 wire mod)
> K3 IF OUTPUT BUFFER GAIN MOD (For the P3, LP-PAN etc) (1 
> resistor value 
> change)
> 
> Based on feedback form those that have tried the preliminary 
> release of 
> these changes, we are comfortable with adding them as 
> standard K3 features.
> 
> Please note that the last item, the IF Output Buffer Gain mMod, is 
> slightly different than the similar N8LP mod some have been 
> performing 
> on their K3s independently. We determined that only one value 
> needs to 
> change to implement the gain increase for the IF output. We 
> are changing 
> R8 from 1K ohms to 13K ohms.   (Those that have made the N8LP mod may 
> also leave it as is.)
> 
> Also, we are releasing new beta f/w today, MCU 3.27/DSP 2.24. This is 
> already available on the web page at:
> 
> http://www.elecraft.com/K3/k3_software.htm
> 
> This release includes:
> 
>     *ADDITIONAL NOISE REDUCTION (NR) IMPROVEMENTS.
>     *AUTONOTCH depth improved.
>     *SHIFT=.01 FIXED WITH LOW SIDETONE PITCH (300 Hz).
>     *VFOs NOW TUNE DOWN TO 490 kHz.
> 
> We never sleep in Aptos! :-)
> 
> 73, Eric   WA6HHQ
> 
> Roy Morris wrote:
> > I would like to know if is the intention of Elecraft to incorporate 
> > the K3 AUTOMATIC FRONT-END PROTECTION mod and the K3VFO 
> TUNING NOISE REDUCTION mod in future PC boards.  If so, I 
> plan to install these mods in my K3s.  Roy Morris  W4WFB
> >   
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html