For CW particularly, I find being just a little away from the bigger zeros makes a huge difference. Much less likely to get some alligator stomping on you on 7,031.3 (or wherever, plus or minus)…
…and I always have my tuner on the smaller step setting because sometimes a tweak of a few Hertz makes all the difference.
That’s what I have done with my 2019 board. The generator overdrives the crystal and It’s third harmonic. It should work also with a second harmonic crystal.
73 Chris
Thanks. I’ll look into that if the drifting proves problematic. 
Hi Guys,
I also managed to get one set from eBay. I need to read on it and get some parts to make a small unit. Board version 2025.
Any additional pointers.
Thanks
Marek
I’m curious about the current circuit. Could you post a picture of the transverter’s circuit diagram here?
73 Chris
Sorry Chris, copy is not very good, you can’t read element values, but type of element and general schematic its reasonably clear.
Any detailed questions just ask.
Marek
Mine likewise. The last bits I think I need arrived this afternoon. Hoping to have time to hook everything together over the weekend.
Yeah, it (mostly) gives the general scheme of things, but values aren’t readable, and some of the symbols are a bit tricky on my copy. However, the connections that need to be made seem clear enough.
I have one of those transverters, it works ok with similar sensitivity to the FT-817. Transmit output is good as well, something like 12W reliably.
The down side is the frequency stability, it does drift around a lot. I saw Chris’s addition of the TCXO, that sounds like a good solution, I might give it a try. Here is mine packaged up, it’s pretty compact.
Well, I think it’s alive…
Not so pretty inside…
I’ve hooked it up the the 5-element 2 metre yagi I have put up in place of the old white stick (which needs serious maintenance (or maybe the bin?) 
) but I’ve not managed any contacts with it yet. The yagi’s pointed a smidge west of north, which is the direction in which I have the clearest horizon.
I’ve listened for a couple of activations that I figured might be in range in the last couple of hours ( GW4AZS/P on GW/MW-013 108kms at 335º from here, and GW4HQB/P on GW/MW-009 97kms at 324º) but couldn’t hear either of them, nor (except briefly and confusingly, a snatch of a QSO giving the activator’s callsign, which I guess was aircraft scatter) any chasers.
GW4AZS/P’s spot indicated his antenna was a vertical, so that won’t have helped me, but I couldn’t even hear his CW here. I could see it just fine on Hack Green, though.
As a test I tried listening to myself on Hack Green. I could make out my CW, just, but not any SSB. From the CW, it seems the rig shows an offset of around 500 HZ as seen on Hack Green, but clearly more tests are needed, and I’ve not run it long enough to get warm.
It looks nice, Rick, and thanks for listening out for me. I was using a simple wire Jpole, and because of the strong southerly wind, I was a few metres below the summit to the north, which would not have helped in your direction.
Looking forward to an SSB / CW Q before too long.
Yes, that would have put a little more geography in the way, in addition to the cross-polarization. I’ll need to put together an activation-friendly antenna at some point so that I can take the transverter up a summit.
I’ve added a photo of the inside, which isn’t quite so pretty… 
I was beginning to wonder, but I’ve finally made successful QSOs with this. 
Looks good, Rick. Did you just follow the transverter setup per the kx3 manual, for PTT and frequency display? What drive power have you set? I’m interested in adding 2m to my kx3.
Andrew VK1DA/VK2DA
Pretty much. I set the drive power (into the attenuator) at 5W. The default was a bit lower, but the docs for the attenuator said something between 5 and 10 so I went to the lower end. You could set the KX3 drive power much lower (I think it’ll go down to under 100mW) and not use the attenuator (and probably get rather better battery life when out /P on account of not putting most of 5 watts into warming up the attenuator), but I figured I just had more margin for error if I used it. The KX3 has a bunch of other twiddle factors for transverter use. I’ve used the frequency offset to get the displayed value as close as I could to a reference.
