[Elecraft] K3 and Javornik II transverter
G0AFH
Is anyone here running a Javornik II 2m transverter with their K3? just
wondering how well the two perform together.
73
Ian
G0AFH
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G0AFH
Jeff Cochrane - VK4BOF
From: G0AFH
To: elec...@mailman.qth.net
Sent: Thursday, June 10, 2010 3:21 PM
Subject: [Elecraft] K3 and Javornik II transverter
Hi,
Is anyone here running a Javornik II 2m transverter with their K3? just
wondering how well the two perform together.
73
Ian
G0AFH
G'day Ian,
I don't know about the Javornik transverter but the Elecraft K144XV internal transverter is fantastic.
I am hearing signals now that my old FT847 could never hear due to its front end being as wide as a barn door and it getting nailed by Plasma TV's.
The K144XV works for me! :)
Jeff Cochrane
VK4BOF
Innisfail QLD
Australia
Elecraft K3 #4257
g0afh
Thanks. I already have the Javornik which is currently used with my
Ft1000MP. Just thinking about an upgrade...
73
Ian
Dominik Bugmann wrote:
> Hi Ian,
> Yes, HB9AJ is using Javornik on 144MHz together with a K3. No issues at all. IF is 14MHz and we use 4x 7el vertically
> stacked and/or 4x 11el in H formation.
> Unfortunately Javornik is sold out ... (at least that's the info I heard last year).
> 73 de Dominik, HB9CZF
> >Hi,
> >
> >Is anyone here running a Javornik II 2m transverter with their K3? just
> >wondering how well the two perform together.
> >
> >73
> >Ian
> >G0AFH
g0afh
Thanks. I already have the Javornik.
Out of interest, can you split the TX/RX paths on the K144XV? I need to
add a couple of filters in the receive line to keep some fairly big
local signals out.
73
Ian
Jeff Cochrane - VK4BOF wrote:
>
> ----- Original Message -----
> *From:* G0AFH <mailto:g0...@g0afh.com>
> *To:* elec...@mailman.qth.net <mailto:elec...@mailman.qth.net>
> *Sent:* Thursday, June 10, 2010 3:21 PM
> *Subject:* [Elecraft] K3 and Javornik II transverter
g0afh
Thanks for the info. That should all be fine.
On the K144XV can the TX and RX be split at 144MHz? That is where I need
to add the extra filtering.
I presume that the second RX is still available as a separate input when
using the transverter interface? The Javornik transverter has two
receive converters.
73
Ian.
Dave Zeph wrote:
>
> Jeff .... I've used both a XV50 and a XV144 with my K3. The K3 and the
> XV Transverters work hand-in-glove.
>
> The POWER OUTPUT of the K3 can be controlled incrementally to between
> 200 mW –100 W. The Power Output of the Transverter XMIT Output can be
> varied between .01mW to 1mW
>
> The K3's (KXV3 Module) TRANSVERTER Input & Output are SPLIT - and
> Power Level is selected via CONFIG Menu item.
>
> XVx PWR H 0.1 Allows fixed or variable power level for XVTR band x.
> Tap 1 – 9 to select xvtr band. H x.x (High power level) specifies a
> value in watts, and use of the main antenna jack(s). This should be
> used with caution, as you could damage a transverter left connected to
> these antenna jacks accidentally. L x.x (Low power level) species a
> value in milliwatts, which requires the KXV3 option
>
> *Using Transverters*
>
> Nine user-definable bands are provided for use with transverters. Once
> enabled individually, these bands will appear in the band rotation
> following 6 meters.
>
> You can use Elecraft XV-Series transverters and most other transverter
> types with the K3.
>
> *Transverter Band Setup*
>
> Transverter bands are set up using the XV menu entries. In all cases,
> tap 1 – 9 within the menu entry to select a transverter band to configure.
>
> · XVn ON must be set to YES to enable transverter band n.
>
> · XVn RF selects the transverter operating frequency in MHz.
>
> · XVn IF specifies a K3 band to use as the transverter I.F. (7, 14,
> 21, 28, or 50 MHz).
>
> · XVn PWR sets the K3 power output range to be used with this
> transverter band. L0.01-L1.27 specifies a power level in milliwatts,
> which requires the KXV3 option (use the XVTR IN and OUT jacks).
> H00.0-H12.0 specifies power in watts, and selects the K3’s main
> antenna jack(s) for output.
>
> · XVn OFS is used to compensate for any frequency offset in the
> transverter’s oscillator/multiplier chain. The value shown is in kHz.
>
> · XVn ADR specifies an Elecraft XV-Series transverter selection
> address (see Transverter manual).
>
> Further details on these menu entries can be found in the CONFIG menu
> listings. For information on transverter control connections and band
> data, see pg. 19.
>
> CAUTION: We recommend the use of milliwatt-level drive with
> transverters (via the XVTR IN and OUT jacks). If you use the K3’s main
> antenna jack(s), you could accidentally transmit into a transverter at
> high power.
>
> 73 Ú Dave, W9ZRX
g0afh
Thanks. I think I may have created some confusion here too!
My transverter has two receive converters, i.e two 144MHz antenna inputs
and two separate 14MHz IF ports. In normal operation I want to run with
one receive converter on the K3 main RX, and the other on the K3 sub.
With two antenna arrays I can have one ear on the UK, the other on
Europe. I can do this now with my modified FT1000MP but the 1000 lacks
some of the niceties that the K3 has like being able to synchronously
tune both receivers.
I think that this should be possible with the K3 as it's just like
operating it on 20m using diversity reception and transmitting at a few mW.
73
Ian
Dave Zeph wrote:
>
> Hi Ian .... yes, the K3 has low-output-power, and separate Input and
> Output. The XV144 has matching, separate Input and Output. The XV144
> can be assembled with EITHER a combined single input/output or
> separate Input and Output. That is an assembly option.
>
> Now as to using the K3's optional 2nd Receiver, KRX3 - a description
> of when is possible there is more complex! I'll try to give you can
> example:
>
> K3 MAIN Operating at 50Mhz, with XV-144 used with the KRX3. Yes it is
> possible to listen at once on the two bands I indentified, but ....
> The but is the switching that is involved. This really takes some
> understanding of the antenna switching within the K3. And it helps to
> understand the switching action that can or must concur when switching
> from MAIN on 50, XV144 On Auxiliary Input – to the opposite with Main
> on 144 and 50Mhz being on the Auxiliary, Perhaps some discussion of
> the role of the K3ATU, the KVV3, and the KRX3 is in order.
>
> Here’s a diagram from the rear of the K3 Manual that will either
> clarify the points – or will drive you crazy – and I’m not so sure I
> can describe how it works. I haven’t done it for a year!!
>
> Here you see all the front-end antenna switching. When the MAIN is on
> 50Mhz, and the SUB on 144Mhz, the MAIN gets its I/I via K2 and K3. The
> SUB, which is the 144Mhz signal is feeding the separate low-level
> Receiver XVERTER jacks.
>
> Remember that ONLY the MAIN can transmit. Let’s say you wish to make
> 144Mhz the MAIN BAND. RF Drive to the XV144 is hardwired – but wait –
> the XVERTER Receive signal has no path to back to the MAIN Receiver.
> This can be accomplished by using a BNC-T at the XVWERTER INPUT. The
> XV144 Receive Output cable normally connects to the XVERTER INPUT *and
> a BNC Jumper Cable connects to the RX ANT *which has a path to the
> MAIN Receiver Input.
>
> The 50Mhz can be placed on the 2^nd Receiver – but will not be able to
> transmit because the MAIN is actually operating on 28mHz to drive the
> Transverter.
>
> I well remember discussing it with Wayne (he’s the one that suggested
> a way to deal with the issue), *Unfortunately I haven’t used it since
> last year * The are several switching steps necessary to switch from
> XVERTER on 2^nd Receiver to XVERTER on MAIN, The “patch cable” is the
> only way to get the Transverter’s receive output to the MAIN. Frankly
> I was leery of answering this because of doing it only in one contest
> and that was a year ago.
>
> I’ve never pondered trying to use multiple XVERTERS where the MAIN
> always stays on 28mHz. All of this switching is a result of their
> being multiple inputs that allow use of the 2^nd Receiver when the
> MAIN is being use for the Primary.- and any subsequent desire to
> REVERSE the two “bands”.
>
> Those who have purchased the internal 144mHz Module say it works fine
> – but it’s not obvious if it solves any of these problems. I think
> Elecraft could do a better job of explaining this and possibly
> simplify the switching. Last time I darn near had to write down the
> steps to Reverse 6M and 2M between MAIN and SUB so that I could
> transmit on the desired Band. It certainly isn’t like having a 6M and
> a 2Mrig sitting next to each other when you can send on either and
> receive on either!!!
>
> I fear I’ve just added to your confusion!