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Ubitx V5# CW Key not working# audio is harsh#

[email protected]
 

I ordered Ubitx (got V5) and shipping was 3 days - nice

1. Receive audio is VERY harsh, the audio freq response is tilted with much more gain at high freq audio.
Yes, I did the alignment, which helped some.?
I added a .1uF cap across the volume control to tame it down and this helped at lot (especially with headphones)
I also added 5K in series with the volume control to reduce the gain somewhat.?

2. I could not get the CW key to work. I could read the ADC fall to zero when I shorted out the key voltage.?
Yes, I used the resistor supplied. I looked on the scope on the key line and it looks normal and noise free.?
So the ADC on the nano is working, but I think the firmware is at fault.?

I attached a 10K pot to the key line so I could vary the voltage, I found keyer made dits at 5.3K and das at 9K.?
(roughly the center of the ranges) So I added these resistors to a keyer and it works (the timing is a bit off, some typos result)

Otherwise great rig, lots of fun

Cheers
Randy KE7PWE
 

Randy

nice work in your build and debug.?

given the paddle function to be working, and a presume to send good CW via the transmitter, hard to fathom how manual keying can't be working - with an appropriate voltage read there.? given your pot experiment, I presume you tested it down to zero and not found any manual keying.? I suggest manual keying with a piece of wire, to confirm you don't have excessive corrosion on the key contact - then you could try substituting a resistor for the 4.7 k resistor (also measure that critter).?

A firmware copying issue seems so unlikely with everything else working.? I really think the issue is hardware.?

The sidetone on the v4 is dreadfully loud.? I don't recall any related changes in v5.? Therefore I suggest that you consider this mom developed by a ham in my local club -- I did it and it works wonderfully.?



Curt
Randy Karr
 

Hey Curt, thanks for your note. I did the works to short out the straight key issue not working.?
As I mentioned I can see the ADC drop to zero, so hardware faults are doubtful.?
I mostly wanted to share in case someone else has V5 problems.?

On Tuesday, April 30, 2019, 9:31:29 AM PDT, Curt via Groups.Io <wb8yyy@...> wrote:


Randy


nice work in your build and debug.?

given the paddle function to be working, and a presume to send good CW via the transmitter, hard to fathom how manual keying can't be working - with an appropriate voltage read there.? given your pot experiment, I presume you tested it down to zero and not found any manual keying.? I suggest manual keying with a piece of wire, to confirm you don't have excessive corrosion on the key contact - then you could try substituting a resistor for the 4.7 k resistor (also measure that critter).?

A firmware copying issue seems so unlikely with everything else working.? I really think the issue is hardware.?

The sidetone on the v4 is dreadfully loud.? I don't recall any related changes in v5.? Therefore I suggest that you consider this mom developed by a ham in my local club -- I did it and it works wonderfully.?



Curt
 

If you have selected one of the keyer modes (Iambic A or B) then the straight key will have no effect. Select straight key and all should be well.

=Vic=
 

Randy

Vic likely has it solved, I forgot about that setting to change from paddle to key.

Curt
Randy Karr
 

Thanks Vic, did not know there was an option.
Randy

On Wednesday, May 1, 2019, 2:01:57 AM PDT, Vic WA4THR via Groups.Io <vhklein@...> wrote:


If you have selected one of the keyer modes (Iambic A or B) then the straight key will have no effect. Select straight key and all should be well.

=Vic=

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