Re: ubitx CW straight key wiring

Mike Woods


I want to thank you for pointing out this error on   I have  fixed this temporarily by removing both the photos from that page and by deleting the reference to the wire up error (now out of date)

The original wiring diagram and circuit diagram on were in error.  The error in the circuit diagram was subsequently drawn to list members attention, and I updated the circuit diagram on accordingly.   HF Signals subsequently fixed their circuit diagram and I purged a number of references to the wire up and circuit diagram instructions error.  Obviously I missed one!

It is regrettable that you (and perhaps others?)  have taken the photo as the guide to wiring up their manual key in this manner, and come to grief with the ubitx going directly into TX mode. For that I can but apologise.  Unfortunately this problem wasn't commented on earlier.

Maintaining is a bit of an undertaking. The guide will, from time to time, become a bit out of date, because there is a very active community of hackers. However, I certainly don't want folk burning through finals or getting a really bad steer.   So if anybody spots an error, I attend to these as soon as they are drawn to my attention.   It's normally best to write direct to info@... for the fastest response.


On 2/08/18 1:29 PM, dkuk@... wrote:
I've gone through 2 rounds of blowing finals before I finally found it mentioned that the wiring in the manual for the CW straight key was wrong.
It is also wrong on the website
The resistor and blue wire must be wired to the upper right terminal in both pictures for it to work properly.
With the wiring as pictured my keyers essentially shorted the ring to the sleeve, hard keying the rig.

I would set up my keyer - plug it into the jack on the ubitx, then power the ubitx up,
unaware that as soon as I powered up, the ubitx was keyed until the finals finally fried.

This is the reference from the same web page mentioning the error in the schematic:
"There is an error on the circuit diagram and the wire up instructions for the CW Key.  The
diagrams show the key connected to pin 2 of the key jack. Pin 2 is the RING terminal, not the TIP."

Just wanted to put this out there in case anyone else is going through similar frustration.
I was so frustrated that I was ready to scrap my ubitx.

Mike Woods

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