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Sunday 8 April 2018

QRM Eliminator X-Phase

Was asked to look at this so grabbed a few mins with new Tenma soldering iron station and played.

Turned up from ebay in a  few days. The components all look to be there, except the LED to indicate power.

 Nice simple PCB, The pads look a bit close for the SMT versions of the diodes...

 Populated, top is nice and clean. The transformer wire provided was not heat strip so had to manually strip the enamel.

 Underside, not cleaned up yet, so lots of solder spots. Yes the SMT diode pads were a bit close

Ticked off the components as installed.

The 12V connection is a pad on the bottom of the board, no hole so not quite sure how I'll wire this up just yet. I suspect a hole through the pad to the top layer and a 12V connection on top might have been better?

Will put this into a box and add some connections and give it a test... so more to follow.


M1KTA said...

ebay info:

RA0SMS website:

M1KTA said...


gm0obx said...

Do you have any photos or drawings of how the transformer is turned?

M1KTA said...

I'll add more details bit later.

M1KTA said...

that transformer....

The diagram says 2T and 8T and there is a picture underneath.

ONE turn is pass the wire once through one hole and then back though the other so through BOTH holes.

I started on one side (I *WILL* add a you tube link this evening) and wound 2 turns, then turned the toroid around and started on the other side of the transformer and wound 8 turns.
You fit on the PCB as per the diagram.

M1KTA said...

see new post