[Elecraft] Further K3 development

[Doug Turnbull]

Dear OMs,   
     I will follow this thread for a while.   It would be nice to know more
about the performance enhancement as Johnny Siu has stated.

     What I am really chuffed about is that Wayne, Eric and company are
enhancing a radio which has been on the market perhaps seven years now.
Oh I like the modular design and construction and I love the company.

     The K3 is not being made obsolete but it is being updated right back to
SN 1 - My friend Brendan Minish, EI6IZ can update SN 42 and no doubt he
will.    I will be contacting Brendan to see what he thinks.

      Good going guys, my loyalty is rewarded yet attain.   If I can be
jingoistic it is nice to see an American company performing in this manner.
The edge is not lost.   Great to see the engineering continue to evolve the
K3 - thank you.

                 73 Doug EI2CN 

-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Terry
Hart
Sent: 13 February 2015 14:39
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Upgraded K3 synthesizer module now available:
TheKSYN3A

---and I just received my K3 kit serial number 8795. I had no idea this was
coming up!
The extended receiver tuning down to 100KHz sounds
interesting....what are the front-end filtering arrangements for that, I
wonder? And it would be interesting to see some comparative close-in phase 
noise plots.

Terry G3VFO


----- Original Message ----- 
From: "Harry Yingst via Elecraft" <elecraft at mailman.qth.net>
To: "Wayne Burdick" <n6kr at elecraft.com>; "Elecraft Reflector" 
<elecraft at mailman.qth.net>; "Elecraft_K3 at yahoogroups.com" 
<elecraft_k3 at yahoogroups.com>
Sent: Friday, February 13, 2015 1:17 PM
Subject: Re: [Elecraft] Upgraded K3 synthesizer module now available: The 
KSYN3A


> Dang, I just put the sub receiver in last week.... I should have waited
>
>
>
>      From: Wayne Burdick <n6kr at elecraft.com>
> To: Elecraft Reflector <elecraft at mailman.qth.net>; 
> "Elecraft_K3 at yahoogroups.com" <elecraft_k3 at yahoogroups.com>
> Sent: Friday, February 13, 2015 1:07 AM
> Subject: [Elecraft] Upgraded K3 synthesizer module now available: The 
> KSYN3A
>
> The KSYN3A synthesizer module for the K3 is a completely new design that 
> improves on the original KSYN3 in several ways. All K3s shipped on or 
> after January 23, 2015 already include the new synthesizer (serial number 
> 8801 and later).
>
> See feature list below. Ordering and installation instructions can be 
> found here:
>
> http://www.elecraft.com/order_form_parts.htm#K3%20Parts
>
> * * *
>
> NOTE: If you wish to upgrade a K3 that includes the sub receiver (KRX3), 
> you'll need two (2) KSYN3A modules, since the synthesizers for both 
> receivers must be of the same type.
>
> * * *
>
> KSYN3A FEATURES:
>
> * FASTER CW BREAK-IN AND MORE ACCURATE CW TIMING
>
> A dedicated coprocessor on the module permits faster transmit/receive 
> switching, improving CW timing accuracy with both internal and external 
> keying. This also speeds up receive recovery between elements.
>
> * ULTRA-LOW PHASE NOISE
>
> The KSYN3A significantly improves the K3's already excellent receive and 
> transmit phase noise characteristics at close carrier spacings. This, in 
> turn, improves its close-spaced receive dynamic range, yielding even 
> better weak signal detection in the presence of strong signals. In 
> transmit mode, the KSYN3A keeps the signal exceptionally clean, further 
> enhancing K3 performance at multi-transmitter stations, Field Day and 
> DXpeditions.
>
> * 600-METER COVERAGE
>
> The new synthesizer provides complete coverage of 600 meters -- and below.

> VFO tuning extends down to 100 kHz, with sensitivity gradually falling off

> below 450 kHz. Receive sensitivity (MDS) at 475 kHz is typically -120 dBm 
> at the RX ANT IN jack. Transmit output of about 1.0 mW is available for 
> use with a suitable external amplifier. (Note: 600-m allocations vary by 
> country. Operation on this band requires the KBPF3 and KXV3 options. For 
> receive-only use, an antenna can be connected to the RX ANT IN jack on the

> KXV3 module. For transceive operation with an external amplifier, use the 
> XVTR IN and XVTR OUT jacks, and set CONFIG:KXV3 to TEST.)
>
> * EXCELLENT MECHANICAL STABILITY
>
> The KSYN3A is virtually immune to both physical vibration and magnetic 
> coupling, and operates over a very wide temperature range with no change 
> in performance. K3 kit construction is simplified, as the KSYN3A requires 
> no alignment of any kind.
>
> * * *
>
> 73,
> Wayne
> N6KR
>
>
>
>
>
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