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70cm (432 MHz)

8x DSEFO432 EME antennas at K8GP multi-op FM08fq Spruce Knob, WVa

8x DSEFO432 antennas at K8GP multi-op FM08fq Spruce Knob, WVa

4x DSEFO432-25 at K8GP multi-op FM19bb

Click on any bold model number below to view or download a PDF manual.

Antennas will accept up to 2″ mast, […]

1.35m (222 MHz)

DSEFO222-16 antenna at K8GP multi-op FM08fq Spruce Knob, WVa

2x DSEFO222-16 antennas at K8GP multi-op FM08fq Spruce Knob, WVa

DSEFO222-16 @ K8GP contest site FM08fq Spruce Knob, WVa

Click on any bold model number below to view or download a PDF manual.

Antennas will accept up to 2″ […]

2m (144 MHz)

4x FO12 at K8GP multi-op Spruce Knob, WV FM08fq

DSEDPM144-5LVA 4 and 8 at K8GP multi-op Spruce Knob, WV FM08fq

DSEDPM144-5LVA’s 4 and FO12’s at K8GP multi-op Spruce Knob, WV FM08fq

Click on any bold model number below to view or download a PDF manual.

Antennas will accept […]

Stacking Frames

All Stacking Frames are custom made to your specifications.

To place an order, please go to the Home tab.

ModelDescriptionPrice DSE2M-2SF-55002m Stacking Frame – 2x 144-6’s, FO12’s, FO15’s, FO19’s for G5500272.95 DSE2M-4SF2m Stacking Frame – 4x 144-6’s, FO12’s, FO15’s, FO19’s (elevation option available)178.95 & up DSE2M-4SF-55002m Stacking Frame – 4x FO12’s with horizontal to fit […]

Power Dividers

To place an order, please go to the Home tab.

What are power dividers and phasing lines and how are they used?

When you want to stack antennas for higher gain/sharper pattern, the antennas must be fed in phase for the two signals to add properly. When you connect two 50 ohm antennas together, the […]

Phasing Lines

Many of our customer’s request custom phasing lines for antennas other than Directive Systems. To be clear, our “phasing lines” are electrically equal lengths of 50-ohm coax and are intended to be used with a power divider. Except on 6 meters, we do not use 75-ohm coax as transformers.

We use high quality double-shielded foam […]

Parts

To place an order, please go to the Home tab.

ModelDescriptionPrice DSE”XX”DEDriven element for loop Yagis (“XX” represents the frequency)11.00 DSE”XX”CONNConnector assembly for loop Yagis (“XX” represents the frequency)21.00 DSEINS316Insulators 3/16″ (bag of 50)21.00 DSEINS14Insulators 1/4″ (bag of 50)21.00 DSEKEEP316Stainless Steel “Keepers” 3/16″ for K1FO Yagis (bag of 50)32.00 DSEKEEP14Stainless Steel “Keepers” 1/4″ for K1FO […]

Contact Us

Directive Systems and Engineering can be reached at 703-754-3876 Our normal phone hours are: 10am – 7pm EDT Monday-Friday 10am-5pm EDT Saturday Closed Sunday If we aren’t in when you call, please leave a message and we’ll get back to you as soon as possible. We can also be reached at info@directivesystems.com or Directive Systems […]

Tech Notes

Directive Systems and Engineering will post application notes and updates as time permits. Click names below to open or download file/presentation.

Converting a DB6NT 3456 MHz transverter to 3400 MHz

Updating Older Antennas – If you have an older version of a Directive Systems antenna that needs repair – Replacing the driven element on an […]

New Products

Directive Systems and Engineering new products will be listed here.