Assuming you're in the channel islands, you should be able to pick up BBC
radio 4 long wave on 198kHz, if your SDR can handle frequencies that low.
It's referenced to a rubidium standard and checked by NPL.
It can also be used to discipline a reference, or compared with some other
local standard s
Andre
Very interesting on the blue LED varicap. I'll have to see if I have one to
test.
If a few it would be interesting to see if they track with V/C.
With respect to Island FM. The station is unclear to me but the easiest
thing to do is simply call them and ask what there reference is. You indeed
Hi all.
I found something intriguing, on at least some SDRs the 28.8MHz crystal is way
off by about -2%
Reset mine using Island FM to fine tune, a simple reverse biased blue LED (6pF)
to tweak the
centre frequency a bit and now my 1990 vintage Black Star counter and SDR agree
correctly.
Act
