Mike, see my SIMPLER spur fix without loss of Po!
Tested on two boards here..
Raj
At 10-10-18, you wrote:
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Iz
Spurs news item:? ??
Just 3 parts and you will have that one licked.? ?? However, it may
just be an expensive way of introducing -6dB of gain!
Mike
On 10/10/18 7:56 PM, iz oos wrote:
Mike, what are the three parts to resolve spurs? I might have missed
something.
Il 10/ott/2018 08:38, "Mike Woods"
<mhwoods@...> ha
scritto:
- Eliott
- The latest version of the uBITx is the v4, which doesn't have an
audio chip at all (it has discrete transistors).??
- The v4 board MAY have audio issues ... a small proportion of owners
have experienced audio distortion.?? There is a known fix for this
issue and the fix is documented on
.?? The audio also has a bit
lower output than the v3 board.
- You discuss the IMD issue, but this doesn't appear to affect most
users in practice.? ?? It may result in some splatter if you are
over-driving the audio, but really can't be considered a major impediment
to a purchaser.??
- There are several other issues (see
for a summary
of pros and cons).
- If you don't want to modify the board to fix issues that really
matter (harmonics - the most substantial mod that is required), spurs
(requires 3 parts), and to add an AGC (multiple parts) then I suggest you
don't bother buying the kit.? ?? You may have to wait a while to see
a further upgrade from HF Signals though (if ever)! If you don't mind
spending a bit of time having fun making these changes, then go for
it!?? Lots of us out there are having fun.
- 73
- Mike ZL1AXG
- ??
- On 9/10/18 6:26 AM, Eliot Ricciardelli via Groups.Io wrote:
- I am specifically referring to the current rev of the uBitx.
Specifically - the audio chip issue and the IMD issue. You stated all of
yours are in spec and didn't mention any component issues so I assume you
have none. That is helpful, thank you.
- --
- Mike Woods
- mhwoods@...
--
Mike Woods
mhwoods@...
Raj vu2zap