Nixie Tube Clock ‘Nixie QTC’
Issue 10a (21 March 2014)
www.pvelectronics.co.uk
- 25 -
6.2 IN-8-2 and ZM1177 Nixie Tubes.
Tube cell type: IN-8-2
Code configuration: A
These tubes have a gap between leads at the back of the tube. The
ZM1177 in fact has a small stub of a lead that is trimmed at
manufacture. This helps identify the back of the tube, as well as
being opposite to the viewing face of the tube.
The ZM1177 also has a gap between tubes near the front.
Disregard this gap - the wires at either side will fit into adjacent
holes on the PCB. Remember: 12 wires into 12 holes.
To facilitate easy insertion of the flying leads into the small holes, it
helps enormously to trim the flying leads with a pair of scissors as
shown below. Start at one of the leads at the back of the tube.
Then, working around the tube, cut each sucessive lead approx
2mm shorter than the previous one. This will allow you to feed
each lead in in turn.
Now you can insert and solder in the tube. Insert the 12 leads into
the 12 holes. Insert from the side of the PCB with no markings.
Pay attention that the tube sits squarely on the PCB. Ensure the
tube is facing perfectly forwards before soldering - you may need
to twist it a little.
Note that there is one hole that is unused - simply trim off this lead
without soldering.
Then solder on the connector (which may be in two pieces).
Содержание Nixie QTC
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