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Vertex FTL-1011 series Noise Blanker Control By Adam T. Cately KB8MDF

I have created a modification for the noise blanker circuit to make it run full-time. The normal usage is programmable via the front-panel "A"-button. The mod allows you to use the "A"-button for something else, and still have the noise blanker activated all the time, which is desirable for mobile use of the radio. The schematic snippets below guide you through the modification. Click on any image for a larger view.

The first image shows the static on/off voltages around the noise blanker control circuit so we know what we're working with.

The second image shows the beginning of the mod to disconnect the "A"-button control line from the noise-blanker logic.

The third image shows what traces to cut and access, and the added resistor used to activate the noise blanker.

The last image is just a close-up of the text at the bottom of the photo above.

Contact Information:

The author can be contacted at: adam_cately [ at ] embarqmail [ dot ] com.

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This page originally created on Wednesday 17-Feb-2021.

Article text and layout © Copyright 2021 by Adam T. Cately KB8MDF.
HTML by Robert W. Meister WA1MIK.

This web page, this web site, the information presented in and on its pages and in these modifications and conversions is © Copyrighted 1995 and (date of last update) by Kevin Custer W3KKC and multiple originating authors. All Rights Reserved, including that of paper and web publication elsewhere.