Solder Smoke and burnt fingers Elmer Night as Skyview Line voltage and frequency meter October 25, 2011 P Pinyot.

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Presentation transcript:

Solder Smoke and burnt fingers Elmer Night as Skyview Line voltage and frequency meter October 25, 2011 P Pinyot

The idea November 2011 QST An Expanded Scale Voltmeter for 120 or 240 V ac – With a Bonus. May 2011 QST Junk Box line frequency monitor.

Insert pages from QST articles

Order of business Pass out parts Start with the Volt meter Put all voltmeter parts into the box. Modify meter scale. Test and calibrate volt meter. Proceed to Frequency meter.

Frequency meter Point to point wiring Proto board assembly. Top sticker shows parts placement. Bottom red lines show component wire connections. Meter shunt resistor included on board. Switch chooses between Volts and Hertz.

First we build the volt meter Insert picture of Far Radio Circuit PC board….

PC board from Far Radio, Oh. Populate Volt meter board. Add jumper Add resistors Add pots Add Zener Add bridge Add lead wires to Frequency board.

Procedure Populate voltage meter board. Add wires to support Frequency board. Drill partial detent (hole) for switch. Install switch Install meter Wire meter to center lugs of switch. Push wall transformer wire through box bottom Knot wall transformer wire for strain relief. Connect wall transformer to voltage meter board

Placement of boards.

Add switch to meter. Watch the polarity!

Add wires to Volt meter board

Wires from Voltmeter board to Frequency meter board Strip one end of the wire. Leave other end covered (un-stripped). Positive and Negative DC voltage. Solder to DC side of rectifier bridge. Single AC voltage sampling wire. Use a different color like Yellow. Add two wire from board to meter switch. Track polarity.

Procedure continued. Add volt board foam bumper to box Secure voltage board into box. Connect meter output wires from board to switch. Temporarily assemble box.

Modify meter scale. Lift off meter cover. Remove two Philips screws and put in container. Carefully slide away meter scale. Spray bare metal side of meter scale with contact cement. Position new scale over meter scale blank side. Line up screw holes. Trim meter scale paper. Slide scale back into meter and replace screws and cover.

Lift off meter cover.

Remove or replace screws.

New Meter scale c/o KB3EYY

Trim meter scale

New paper scale to back of meter scale plate.

Replace meter cover and proceed to calibration.

Add more labels.

Build Frequency meter board. This can be done at a follow up Tuesday or at your home.

The pulses from the transistor.

Position parts layout stickers. Insure sticker is lined up with Red trace markings.

Proto boards. Use the three pin 12 volt regulator as your guide.

Start with resistors.

Wire variable resistor as a rheostat Rheostat – a two wire device.

Add active components

Work on the lead placement as you add parts.

Leads begin to form traces.

Install frequency board into box and wire to voltage board.

Thank You!