1268 South Ogden Street Denver, Colorado 80210 USA

email SEI     Phone: 303-722-2257  

9 a.m. - 5 p.m. (Mountain) Monday - Friday

We only accept PayPal, Check or Money Order due to exorbitant credit card processing fees

Retirement has come after more than 45 years. Products no longer available:

SE-3 MK IV

No longer in production after more than 30 years --

Check eBay for a pre-owned SE-3

Drake R-4C

Synchronous Detector

Listen to the effectiveness

Interfacing a shortwave radio to SE-3

R4-C Kits & Accessories

First-IF roofing filters

Drake R-4C filters

Cooling Kits

Catalogues

R9000

Icom IC781

Amateur Radio

Short Wave Listener

Filters

Other Products

Drake, Racal, JRC, Icom, & Atlas

Collins 455 kHz mechanical & crystal

DSP protection filter replacement

IC-765 distributed roofing filter NEW

First-IF roofing filters

Japan Radios NRD models

Icom R9000 | R8500

Presentations, How To Tips, & White Papers:

How To Optimize Rig Performance

Dayton Contest University, 2014

Video (mp4)  (YouTube)  (all CTU videos)

Slide Show only (ppt or pdf)

Click to view, or to save, right click & Save Target/Link

How To Optimize Rig Performance

Albuquerque NM, 2014

Slide Show only (ppt or pdf)

Click to view, or to save, right click & Save Target/Link

* Recent Video Presentations *

How To Optimize Rig Performance, 2014

New Offerings, 2013

Transceiver Performance, What's New, 2011

Click to view, or to save, right click & Save Target/Link

Transceiver Performance

10 Years of Change

Dayton Contest University, 2012

Slide Show only (ppt or pdf)

Click to view, or to save, right click & Save Target/Link

New Offerings 2013

Since Dayton 2012

Dayton Contest University, 2013

Video (mp4)  (YouTube)  (all CTU videos)

Slide Show only (ppt or pdf)

Click to view, or to save, right click & Save Target/Link

New Offerings 2013

Since Dayton 2012

Daytime Presentation, Huntsville AL, 2013

Slide Show A (ppt or pdf)  |  Slide Show B (ppt or pdf)

Click to view, or to save, right click & Save Target/Link

Transceiver Performance &

Evolution of Lab Testing

Banquet Presentation, Huntsville AL, 2013

 Slide Show (ppt or pdf)

Click to view, or to save, right click & Save Target/Link

Transceiver Performance

10 Years of Change

Ten-Tec, Sevierville TN, 2013

 Slide Show (pdf)

Click to view, or to save, right click & Save Target/Link

New Offerings 2013

Since Dayton 2012

W4DXCC, Pigeon Forge TN, 2013

Slide Show (pdf)

Click to view, or to save, right click & Save Target/Link

Choosing a Transceiver

Far from Simple

Dayton Contest University, 2010

Slide Show only (ppt or pdf)

Click to view, or to save, right click & Save Target/Link

Receiver Performance Transmitted BW Contest Fatigue

Austin TX, 2010

PowerPoint (ppt) - Acrobat (pdf)

Click to view, or to save, right click & Save Target/Link

Transceiver Performance

What's New In the Last Year?

Dayton Contest University, 2011

Slide Show with Audio (wmv)

Slide Show only (ppt or pdf)

Click to view or listen or to save, right click & Save Target/Link

Roofing Filters, Transmitted IMD & Receiver Performance

Boulder Colorado Amateur Radio Club (BARC), 2011

Audio (mp3)

Slide Show (ppt or pdf)

Click to listen, or to save, right click & Save Target/Link

Roofing Filters, Transmitted BW & Receiver Performance

Dayton Contest University, 2008

Slide Show with Audio (wmv)

Slide Show only (ppt or pdf) - Audio only (mp3)

Click to view or listen or to save, right click & Save Target/Link

Roofing Filters, Transmitted IMD & Receiver Performance

Boulder Colorado Amateur Radio Club (BARC), 2008

PowerPoint (ppt) - Acrobat (pdf) - Audio (mp3)

Click to view or listen or to save, right click & Save Target/Link

Roofing Filters, Transmitted BW & Receiver Performance

YCCC , Boxborough, MA, 2008

PowerPoint (ppt) - Acrobat (pdf)

Click to view, or to save, right click & Save Target/Link

Ground Screen Replace/Compliment a Radial System

Dayton Contest University, 2009

Slide Show only (ppt or pdf)

Click to view, or to save, right click & Save Target/Link

Receiver Performance Transmitted BW Contest Fatigue

Boulder Colorado Amateur Radio Club (BARC), 2009

PowerPoint (ppt) - Acrobat (pdf) - Audio (mp3)

Click to view or listen or to save, right click & Save Target/Link

Roofing Filters, Transmitted IMD & Receiver Performance

DXCC, Schaumburg IL, 2009

PowerPoint (ppt) - Acrobat (pdf)

Click to view or listen or to save, right click & Save Target/Link

Roofing Filters, Transmitted BW & Receiver Performance

DXCC, Rochester MN, 2009

PowerPoint (ppt) - Acrobat (pdf)

Click to view, or to save, right click & Save Target/Link

DSP Radios - Not Perfect

Dayton Drake Forum, 2007

PowerPoint (ppt) - Acrobat (pdf) : Slide #8 click on speaker to hear sound clip

Radios Used in a Contest Environment

Hamvention 2004

Presentation & Additional Information

Other Tips & White Papers:

• HF Mobile Antennas: methods to improve radiation efficiency*   (complete issue)

• Ground Screen: alternative to a buried radial system*   (complete issue)

• Present-day receivers: some problems & cures*   (complete issue)

• Dynamic Range Data Table

• Measurement Accuracy & Sample Variation

• R-4C Alignment Tips + FPS-4 Update (Updated 2013)
  

* Article posted with permission from ham radio magazine

Receiver Test Data

(Terms Explained: DOC PDF)

Links & Shipping

SEI Favorite Links

Shipping Information

1268 South Ogden Street Denver, Colorado 80210 USA
Phone: 303-722-2257     FAX: 303-744-8876     email SEI