Testing Now Underway

Testing is now in progress.  After checking for any low resistances with the ohm meter no problems were found.  I then attached the battery and measured the current which was 800 mA which according to G0OKD was well within parameters. 

I then checked the voltages across R6 and R2 which were showing voltage drops which gain indicated the circuit was drawing current correctly.  On applying my new high tech audio probe  (.75mm steel crochet hook) to pin 2 of IC2 LM368 audio amplifier an very loud hum was heard through the speakers inducing that all is well with the af amplifier. 

The next stage will be to check the output for the NE612 mixer IC. 

All My Own Work

The End Is In Sight

Slowly over the week. sadly work gets in the way, the final parts have been soldered, wire to gain control, tuning capacitor etc all in place.  All it needs now is a final checking over for solder bridge and dry joints and it will be ready for testing.

Fingers crossed. 

Oops

Yes ,I have realised have  transposed L3 and L1.  I am now de-soldering and re positioning. . 

All capacitors now fitted.  Played hunt the capacitor for the one that went missing off the polystyrene board.  It would be the tiny one wouldn't it.  

Tweezers now located finger burns reduced. 

Capacitors lined up and ready for installation tomorrow.   So far the project is going well and board is very easy to solder.

Notice the eye glass for checking for bridges and dry joints.  I am getting old and the eye sight is going.   

A hour at a time is quite sufficient for me.  Therefore this could be a long project.  

Next stage photo - resistors in place and blood wiped off board.

 

Today the IC Holder tomorrow the world

The soldering iron was retrieved from the loft a little behind schedule.  The IC holders. coils and resistors are now on the board all carefully checked by my assistant and photographer G0OKD.  Just a few minor burns when holding in the resistors.   Now where did I put that set of tweezers!!!

Photograph of IC holders and coils in place.  

 

My somewhat unorthodox toolkit with a ten pence piece to give an indication of size.

Day 1 (Preparation)

First of all I separated the boards and finished the edges with a emery board.

I have found my travelling kit of jewellery making tools very useful for bending the pins on the IC holders and a pair of very fine tweezers were brought into use for the breaking the ceramic  capacitor on  L3 the oscillator coil and removing the solder lugs on each side of the screened can.

On Friday the real work begins, the Antex soldiering iron comes out of its box for the first time.

 

First buy your kit

Hello

This is the first post in my blog on builidng the G-QRP Club  Limerick Sudden 40 metre receiver. The receiver was designed Rev George Dobbs G3RJV with printed circuit board designed by Rex Harper W1REX.  

I purchased the kit from the GQRP stall at the 10th Junction 28 G-QRP Rally in Alfreton Derbyshire.  This rally is organised by South Normanton Alfreton and District Amateur Radio Club in association with the G-QRP Club.  The rally is aimed at the constructor with may of the stalls selling varied  components.

Please note I am noted not employed by either organisation and this project is strictly for my own interest.   I am studying for the UK Advanced Licence and hope that building this kit will by help me understand how components work in an actual circuit.