Rob Sherwood: "TRANSCEIVERS"

Forward

Rob Sherwood, KC0B is perhaps the world's most recognized  authority on transceiver performance. 40 years ago, Rob began stressing the importance of focusing on receivers' "close in" performance.  His "Sherwood Filters" (today called roofing filters) for the Drake R4C receiver raised the bar for receiver performance in the mid 1970s.  

 

Today, Sherwood Engineering is famous for its "Transceiver Performance List", comparing modern transceiver with each other based on their close-in dynamic range (BDR3).

 

RECENTLY ROB HAS SUGGESTED HIS LIST MAY BE MISLEADING PEOPLE.  

 

On the following pages, Rob will set the record straight on what is important

for transceiver performance and explain why several other things

are just as important as a radio's BDR3.

SHERWOOD SOUND BYTES (SSB):

 

This section is a collection of short takes Rob has posted in various online forums and or private emails to me personally.  Of course all of these are posted with Rob's permission.

 

This contains information on things suchs as:

  • Transceiver Characteristics
  • Attenuator: perhaps "the" most important feature of any radio
  • Inconsistencies in measurements and specifications
  • Mistakes people make when adjusting radios

TRANSCEIVER PERFORMANCE LIST:

 

Though the contents of the list are accurate, the interpretation of the list has often been very misleading.  Although the list is an excellent tool for comparing certain receiver characteristics, there are many other receiver characteristics as well as transmitter characteristics which do not appear on this list at all.

 

If you would like to learn more about the other characteristics of each rig, you should study Rob Sherwood's full test review of each transceiver.

 

TRANSCEIVER TEST REVIEWS:

 

In order to collect the data for his Performance List, Rob had to run extensive tests on each of these radios.  The reviews shown here include ALL of the measured data and usually a page or to of subjective opinion of the radio.

SHERWOOD PRESENTATIONS:

 

This section contains a collection of various presentations that Rob has given over the past several years.  Many of them include the original sound track of the presentations, so you can listen to Rob as you browse through his slides.

THE COST OF TRANSCEIVER PERFORMANCE:

 

This section takes another look at the performance results of the transceivers listed in Rob's Performance List, but adds in the COST FACTOR to the scenareo. 

 

This is only a partial evaluation, as only the purchase price is considered.  Cost Of Ownership (COO) and possible repair costs are not considered.

 

IMPORTANT:  the cost evaluation in this section was performed by me (DJ0IP), not by Rob.  Where possible I used street prices, mostly taken from Ham Radio Outlet's web site.  Prices for Elecraft and FLEX radios were taken from their respective web sites.  DATE:  15-JULY-2019.