Hi Armin,
The link you posted goes to a Gali-4 device. The devices in your photo are marked ‘84’. Are they Gali-84?
Are these equivalent devices? The circuit diagram shows them as SGA-7489
Thanks for the info, I am experiencing the tuning problem intermittently, perhaps when the radio is running warm. I’d suspected a cold solder joint but now I’ll check the comparative V on the resistors as you suggest.
Leo M0NNQ
Mark,
There is an upgrade for the tuner in the KX2.
That was a year ago. If only Colin had a better crystal ball. Several hundred at most? True for the first 24 hours after release, I hear.
Elliott, K6EL
https://www.digikey.de/de/products/detail/mini-circuits/GALI-4/13929097
All I can tell you is that I ordered this brick based on KK4DF’s advice… and it works. Unfortunately I can’t say anything about comparable types. I don’t know why it has such a print on it either.
The 84 is on the original brick… the replacement part has no print at all.
73 Armin
My KX2 (02507) suddenly stopped transmitting on 17m and 15m. At first I thought the antenna was broken; checked it with the analyser and it was fine. Put the KX2 on a dummy load and found there was no RF out on the affected bands, even in bypass mode. 
All other bands are working fine. Contacted Elecraft this morning. Looks like it may have to go in for repairs.
73 de OE6FEG
Matt
Hi Matt, That is very annoying indeed.
Did you try turning down the power level from 10 watt to 9,1 or 5 watt?
I have the effect on 10m that I get no output power when I am above 9,3 Watt output.
There is a power recalibration function in software too be done but I have not tried that yet.
But in your case with 15 and 17m it sounds like a defect in the low-pass filters 
73 Joe
Yes, I tried turning the power down, with no success. I’ll just have to wait and see what Elecraft say. Luckily, the new QMX should be finished tomorrow (just need to replace a cap I damaged with the flush cutters 
), so I will have something to play with whilst the KX2 is out of action.
73
After almost 6 years and almost 1100 uses with activations between -15°C and +40°C in a wide range of weather and conditions (plus a few uses besides SOTA), my KX2 has become pretty tired.
Whenever I open it up, I find things that make me think it’s a biotope.
In addition to the driver transistor, I’ve changed 3 different encoders. (2 x VFO - and that one will be replaced soon)
Over time, all kinds of defects that have been documented somewhere have arisen… e.g.:
With SSB, the frequency on the higher bands is not stable and moves downwards.
With SSB, sometimes there is no transmission power and only after briefly switching to FM and pressing the PTT does it return to SSB.
The loudspeaker (which sounds different every day anyway 
) is interrupted…
I have given a lot of thought to replacing it… and if so - with which device? What is the best for my specific needs? …
I have come to the conclusion that (for me) there is no alternative… and have ordered another KX2… and the KXIBC2 to charge the battery when it is plugged in. (I have already had to solder the loudspeaker cable) … I am using the ATU and the cooling plates from the old KX2.
I have considered that the KX2 cost me around 1 euro per activation. That is little compared to what I paid for petrol. 
And it has given me a lot of joy!
73 Armin
Thinking back Matt, this sounds like the same problem that I had with my KX2 about 5 years ago on 15m and 17m. Other bands were OK. I don’t have that radio now, I sold it and bought a KX3. The fault was on the bandpass board serving 15 and 17m. I was able to replace it myself, obtaining one from the agent in the UK for around £50. The dealer said it would be cheaper doing that rather than sending them the radio and working on the circuit board.
73 Phil G4OBK
Well, nothing lasts forever, and like you, I feel I have got a great many activations out of my KX2. Although I don’t think it’s quite ready to be retired just yet.
Brilliant, thanks for the advice Phil, I will contact Lutz in HB9 and ask them about a replacement.
73 de OE6FEG
Matt
Hi Joe, my KX2 does the same thing on 10m. Maybe I’ll try a power recalibration.
Glenn VK3YY.
Instructions are in the manual
Automated Transmit Gain Calibration
To use automated gain calibration (recommended),
connect the KX2 to a computer, run KX2 Utility, and
select the Calibration tab. Click on Calibrate
Transmitter Gain. Follow the on-screen instructions.
The calibration should also be carried out using a stable bench power supply at 13.6v - ish and not a battery. I thought I had a problem with my KX3 as it failed calibration - I had connected my big lipo and the slight voltage sag was enough to upset the radio calibration. Elecraft tech advised the above, the calibration was then successful. Also check the firmware revision is the latest version.
Tim
G4YTD
This is occurring for me now on 20m band. But only when the rig gets very hot. No other bands are affected.
Jim - N0IPA
That is correct, condensation occurs when the temperature of the metal is below the “dewpoint” temperature. The dewpoint depends on the humidity of the air. So condensation often occurs after dawn when the metal remains cold and the air warms up.
David
G0EVV
I guess this did indeed turn out to be the KH1, but even better.
Let me stand up for the KX2. After 5 years with maybe 500 activations with the internal battery (replaced) it is still working.
But not everything is good.
Removing the battery every day to charge it is annoying and has resulted in the speaker cable breaking several times.
The speaker was changed, it wasn’t easy to find a replacement.
The audio cuts out often, but comes back reliably when you turn up the volume. The cause is a mystery to me.
But for me there is still no equivalent replacement. For this feather-light all-rounder!
Except a new KX2, not Armin? 
73 Chris
I sent my KX2 to OE6KYG, Klaus, who has proved very capable when it comes to fault finding and repairs to Elecraft rigs. It seems the fault has been found and he was good enough to provide the following information:
Pin 4 of the bandpass filter connector had a high contact resistance and therefore the filter for 18/21 did not switch
All pins cleaned and sprayed with contact spray, plugged in and unplugged several times.
It’s so simple now, it seems quite embarrassing. I think there’s a lesson there for all of us less technically capable hams, and this is not the first instance I’ve heard of where the contact pins were to blame in Elecraft gear. It’s really only to be expected when electronics are subjected to extreme cold and then high humidity. A very quick fix that saves a lot of money and stress. Do the simple stuff first!
73 de OE6FEG
Matt
Elecraft switched to Goldpins at newer K3
do not know if also Goldpins are used at newer KX2
first KX2 came out 2016… there are still simple ways to repair…
try the same with Yaecomwood 