Tor - Glad you enjoyed the post and thanks for the comments. As a bare board,
these are even better values.
1. Yes, both of our units were 13kHz off. Those little can oscillators seem to
be consistent if not accurate :^)=. From talking to others with the same unit,
they all seem to be off 13kHz. We don’t see that as a big problem though, it is
easy to subtract in one’s head, and many IF rigs can be adjusted to take into
account the offset.
2. FB on the 1mW drive. Did you adjust the drive pot on the transverter board
at all? If so, any comments on that would be welcome. Yes, I think that if you
are in a 222MHz wasteland, getting on the air is the important thing and at 7W
to 8W even with mediocre IMD performance you won’t bother many.
3. Can you measure your final gate bias and send me the value if you feel
comfortable doing this? The paper has the board location to do this.
Thanks for your comments. - Duffey KK6MC
On Feb 15, 2017, at 10:00 AM, N4OGW wrote:
>
> Thanks for posting this. I have one of these 222 transverters and have used
> it for qrp portable. I bought just the bare board and assembled the rest
> myself. Some more comments:
> 1. Mine was also 13 KHz off. If you set the IF on frequency then the calling
> frequency comes out at about 222.087?
> 2. I drive mine from the transverter interface on a K3 (1 mW) with no
> attenuator. Even though this is less than the listed drive requirement on the
> docs that came with the transverter, I get about 7-8 W output. I never had
> any comments about a dirty signal, but I am in the middle of nowhere for VHF
> and have no close stations...I rarely work my own grid in a VHF contest.
> TorN4OGW EM53
--
KK6MC
James Duffey
Cedar Crest NM
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