/parts.
They are available for sale now. Cannot ship for a few weeks due to travel
schedule.
Mike - K7MDL
El87sm/CN88sf
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OCXO or GPSDO. No
drift here!
I have 7 Elecraft transverters between 2 QTHs, plus others for 902/1296, all
but the one 50Mhz box are converted to external LO.
Mike - K7MDL
EL87sm/CN88sf
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Another good way is to listen to 50.313 for FT-8 signals. More of them than
6M beacons in a given area. Lots of activity there when often there is no
voice (or no voice yet). Been working the SW states from WWA on and off
much of the day, morning was best so far.
Mike K7MDL
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service. This is because the campground service requires a web log in,
something the RemoteRig does not handle. I plan to install a Mo-Fi router
in the RV to handle that long term.
- Mike, K7MDL
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but in this case can go either direction. This enables me to use the
opposite station from where I am at as well as continue local operation.
It was noted as experimental. It is now almost 2018. Has anyone done this
successfully?
Tnx!
Mike K7MDL
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The ref lock and TCXO options are not needed for normal work. I do have them
both since I use mine to drive microwave transverters and I also run digital
modes where it is desirable to have the smallest drift and absolute
frequency predictability. At 2M for FM and casual CW/SSB work I doubt you
Might check your crystal filter alignment. The K3 utility also shows a
matrix of when a filters is enabled for each mode.
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Looking at the schematic, RP1 is just a bank of resistors. RP2 however has
all resistors common with Pin 1. So one end should be marked or shaped
differently. Perhaps the shape of the end pin itself, a notch, square vs
rounded perhaps. Or use an ohmmeter to find the common pin, 50/50 chance of
Glad to see you got the issue worked out Brian. And hello from a fellow
Submarine NR-1 crew member (82-85).
- Mike K7MDL
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Since you are using VMware, you have to ensure that USB/Serial is supported
or enabled by the hypervisor. I know it is now available in Hyper-V, not
sure about VMware though.
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There are internal attenuator adjustments in your transverter. You might
want to pop the cover and see what you got.
It should easily get up to 20W out with the 1 mW drive, assuming you have
the right internal input settings. That is what I use here also, 1mW drive.
Since your wattmeter is
Might double check your xvtr settings in the menus and make sure they look
right. If you have a recent good config backup of the K3 you can try
restoring it.
Other things to try:
- Direct setting the frequency via the keypad.
- If you have quick memories assigned to M1-4 keys to set 2M
I think it is more important to look at using the K144RFLK than the K3EXREF
for 2M+ stability. I also chose the hi spec KTCXO03-1 for the K3. This
combo has worked well enough for me.
- Mike
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I took special care to ensure all case covers metal to metal connections were
sanded free of paint. I also did my best to route internal coax cables near
the K3 Synth unit modules in a way to prevent least problems. I also use a
ferrite snap on cylinder with several wraps on the 12VDC P3 power
I have noticed when changing to certain bands there is a delay in setting the
new reference level. Several seconds in I hear a relay click in the P3 and
the grass drops down. Does not always do this, or always on the same band,
but often enough that I am accustomed to it and not worried, it is
Works fine as well as on Windows 8.
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The address of the transverter is likely set different for each. DIP
switches to configure the address if you are using the Aux bus from the K3.
Then in the K3 make sure you have the matching K3 config menu item XVx ADR
(x=a number) setting for the transverter address you have set by the DIP
Are you sure the transverter is actually transmitting on the desired
frequency also? Or is the PLL unlocked and on a semi-random frequency. I
am thinking of the transverter frequency calibration process and if you are
using the reflock feature you have it working right.
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Could be used for TR signal to a mast preamp or an external amp, but most of
those I have seen need 12V by deafult. I suspect the 5V is more useful for
transverter TR switching for simplified connections (fewer wires). You
could have the transverters mounted on a tower making this method more
Can use the K3's RX Ant input.
For other purposes I brought out the internal ATU's connection to the SubRX
using the ExtRef BNC hole. I jumper it to the AuxRF Jack for normal
operation. Pull the jumper and you can route the RX side of the alternate
antenna (now presented at the ExtRef jack)
Note that you have to go into CW mode to set up your preferences, then switch
to SSB. I noted changing between CW and CW-REV made no difference - i.e.
the tone received on a monitor radio remained the same. When in SSB the
tone is correctly placed at your pitch frequency. (I am running latest
Realize the XV144 (external transverter) is spec'd for 144 to 146MHz. Also
running FM it is recommended you run at lower power than the max 20W. Most
FM repeaters in the US are 145-147.999. May be different elsewhere.
The internal transverter K144XV also works in 2MHz bands and switches the LO
The internal 2M transverter IF connects into the the Main receiver input
chain downstream of the Main/RX antenna switch. So it can only be used on
the Main receiver. In fact the ATT and Preamp works as normal as the whole
input side is pretty much connected.
I have other 2M transverters here
K144XV uses it own dedicated ant input (ANT3), so not sharable with HF bands.
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I used mine at home and more often on mountain tops during VHF+ contests as a
rover. I am often in line of sight to other high power rovers and the KW
stations in the valleys below. I used a K2 with my transverters. After a
number of previous rover setups that did not do well, I found this
and schematics on
request. My website no longer exists.
- Mike, K7MDL
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.
- Mike, K7MDL
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I forget which one it is but it either the N0SS mod here
http://n0ss.net/k2_rit-split_led_mod_10.pdf
or
K6XX mod here
http://www.wb3aal.com/Pages/K6XX/K6XXCWIndicatorKit.htm
I think it is the K6XX one, just guessing. You should have the paperwork
there though.
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I have both. The P3 gets used all the time, especially for evaluating band
activity. Super helpful for watching 6M and seeing when the beacons are
coming in. With thr wide spectrum (200KHz) I can watch 50.000 through
50.200 basically capturing the beacons, CW segment, calling frequency, and
all
I have a KRC2 and XV144 and XV222 hanging off the aux bus and need to have
power available to them at all times to keep to keep from hanging up the aux
bus.
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Yes. The trick is to set the XVxADR config item to either Int. trnX for
internal 144 IF use or trnX for the external 28MHz transverter. Both can be
set to display the same or different RF dsiplay frequency. Setting Int.TrnX
always uses the 144 internal transverter. The choice of the value of X
I have run my XV144 and the internal k144XV side by side on the same and
different antennas (one with a mast preamp) to see if there was any
performance advantage between them, and decide if I should sell my XV144 as
now extra equipment.
Lots of A/B switching listening to our 2M weak signal
I use CW in SSB mode on VHF contest regularly. It is a matter of
convenience. Station is calling in SSB, and I hear them, but need to bust
through the traffic going on at the far end, especially when I am a low
power rover out in the boonies.
I try first in SSB but soon I realize I am not
Can use the switched 12VDC power Accessory socket (coaxial plug) on the back
panel near the power plug. If it is already used for for the P3 or other
accessory, then have to tap into it. It will be 12V instead of 5V though if
that matters to your amp.
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My K2 is SOLD, thanks to all who inquired.
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Splitting the sale of my K2 and XV144, will let go of either one in any
order.
K2 now asking $900
XV144 with oven asking $350
- Mike
K7MDL
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the crystal oven it. I will update this
thread with the results either way. Once the K2 is sold I am ready to
order a K3 :-).
- Mike, K7MDL
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as I rebuild my station around a K3 soon
to be ordered.
I am entertaining good offers on the whole unit however and rebuilding my
station from the ground up around the K3 - just because :-).
The XV144 will be posted separately.
- Mike
K7MDL
k7...@hotmail.com
Near Seattle, WA, USA
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inhouse before the
internet age, assuming this unit is from that era. So you might try
contacting CD Technologies for info.
Mike Lewis
K7MDL
Grid Locator CN87xt
Member of Pacific Northwest VHF Society #C96 (www.pnwvhfs.org)
Visit the K7MDL Amateur Radio Pages web site at http://www.K7MDL.NET
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