john jardine wrote:
Done a bog standard, single transistor Colpitts, that covers 110-220Mhz
using a cheap SMV1255-000 varicap. It's part of a BFO arrangement and
intentionally limited to a 110MHz swing (1.5 to 4.5V) but there's a bit of
steam left in the Varicap and 120-240 seems not unreasonable.

That's a Kv of about 36 MHz / V. Naive question ... doesn't a higher
Kv
have the potential for greater noise? What is the effect of a higher
Kv
for the LO VCO on the overall performance of a receiver?