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

[Eric Swartz - WA6HHQ, Elecraft]

yes

Eric
_..._
-----Original Message-----
From: "Joe Subich, W4TV" <lists at subich.com>
Date: Tuesday, Aug 25, 2009 1:11 pm
Subject: RE: [Elecraft] K3 Future Factory Hardware Updates; + New beta f/w release 3.27
To: Reply-    <lists at subich.com>To: "'Eric Swartz - WA6HHQ, Elecraft'" <eric at elecraft.com>,        <elecraft at mailman.qth.net>


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
 >   
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