[600MRG] [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

[Edward R Cole]

 From ye ole junk man: "KL7FZ" I paid a whopping $40 for it.

Only mod was to remove the dual xtal osc and 
capacitively couple the K3 to the bandpass 
filter.  0.1mw drives the NDB to 100w.  NDB run 
linear so any mode can be run.  The 
dual  oscillators were run 400-Hz split in 
frequency with one a carrier and other CW 
producing MCW, which like AM requires linear amps.

The NDB has a built-in antenna tuner which I 
bypassed and I added a relay for TR so I could 
receive with the same antenna.  PTT comes from my 
K3 for the TR relay.  My 600m webpage is still 
corrupted with a virus so still in quarantine at 
the server.  I had details of my 600m setup on there.

I have no idea if he has more of them (and he 
probably doesn't know either).  I was there at the right time.

73, Ed - KL7UW

At 05:56 AM 2/13/2015, you wrote:
>Hi Ed
>
>Where did you find that 100w NDB transmitter?
>
>thanks
>
>jim ab3cv
>
>On Fri, Feb 13, 2015 at 9:52 AM, Edward R Cole 
><<mailto:kl7uw at acsalaska.net>kl7uw at acsalaska.net> wrote:
>Elecraft is offering an upgrade to their 
>synthesizer in the K3, here is the release 
>(copied from the Elecraft Reflector):
>
>* * *
>
>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.
>
>* * *
>Â  Â 
><http://www.elecraft.com/order_form_parts.htm#K3%20Parts>http://www.elecraft.com/order_form_parts.htm#K3%20Parts
>
>Cost is $189.95 and if one has the KRX3 
>sub-receiver two new synth boards must be 
>installed, doubling the cost.  So it will be 
>awhile before I can afford $379.90.  But this 
>is way better than building a transverter to 
>operate lower than 490-KHz (old lower freq limit on the K3).
>
>Tx output is 1.0mw as before so one will need 
>amplification following the K3.  My 100w NDB transmitter drives with 0.1mw.
>
>
>73, Ed - KL7UW
><http://www.kl7uw.com>http://www.kl7uw.com
>Â  Â  "Kits made by KL7UW"
>Dubus Mag business:
>Â  Â  <mailto:dubususa at gmail.com>dubususa at gmail.com
>
>
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>

73, Ed - KL7UW
http://www.kl7uw.com
     "Kits made by KL7UW"
Dubus Mag business:
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