Jay,
Yes, the KFL1-4 is no longer available.
Take a look at the K1 specifications to be certain the frequency
stability is sufficient for your needs. Yes, there is some drift as is
common in any analog VFO (and the K1 uses an analog VFO).
The frequency determining capacitors are either polystyrene or NP0 disc
ceramics which have good (but not perfect) temperature stability. If
the VFO inductor is carefully wound with the turns tight to the core and
it is properly secured, the K1 VFO frequency stability will be better
than specifications.
I have dealt with 2 or 3 K1s with drift outside the spec limits, and
they were 'cured' by properly winding the inductor and/or replacing the
poly capacitors. Most of the K1s that I repair have frequency stability
well within the specs.
73,
Don W3FPR
On 3/6/2015 4:25 PM, J wrote:
I was interested in building a K-1 4-band, but learned the 4-band boards are
unavailable. Can someone confirm or deny?
Also, there was a VFO drift issue in the first K-1's I'd read about. I was
curious if this issue was resolved or still exists.
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