Off hand, no. But the uBitX uses all three. CLK2 for the first
conversion, CLK1 for the second and CLK0 for the BFO. As to the 12MHz,
maybe it was just the VFO freq that I had tuned. Don't know, but it
worked fine under 10MHz, didn't try between 10 and 12 to see where it cut
out.
Vince.
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I'll have to look and see which Si5351 lib I'm using but I get the 12MHz
out. However, do you know of any reason not to switch CLK2 for CLK1?
Thanks!
On 6/26/2017 9:29 AM, Vince Vielhaber wrote:
Actually the VFO uses CLK2. I'm also building up a second one for mods
and the first mod is my own VFO which utilizes both CLK2 for the VFO and
CLK0 for the BFO. Odd thing tho, I couldn't get 12MHZ out of CLK0 with
the si5351 library that the Raduino uses. Switching to Pavel's library
solved that problem tho. My guess is because the other library uses
PLL-A
for CLK0-2 and PLL-B for CLK3-7. The problem is the si5351A only has
CLK0-2 so that library sticks us with only PLL-A. Pavel's doesn't do
that
- hence his 2 of 3 rule.
Vince.
HI All,
I've been working on putting together another BITX40. I didn't leave
myself enough room in the old lashup for mods and additions. This time
I
decided to use SMA connectors for all the RF, VFO/BFO/RFOUT. Nice to
have real fittings instead of clips. Anyway, as I route the new wiring
it would be more convenient to switch the BFO to CLK0 and the BFO to
CLK1. Then I could avoid having the coax cross as it goes to the board.
I seem to remember that there is some reason that the VFO was on CLK1,
board cross talk maybe or something. Anyone know why that is?
Thanks!
Jonathan - KK6RPX
--
Michigan VHF Corp.
