zoom meeting Thursday 22nd July "Transceiver Performance for the HF Contest and DX Operator" by Rob Sherwood, NC0B

[John Gumb]

Folks,

As per my previous email, this Thursday's 15th July meeting will be at
RRFC.

Here is advance notice of the 22nd July meeting which will be on zoom:

Rob Sherwood, NC0B of Sherwood Engineering Inc. fame is perhaps the
world's most recognized authority on transceiver performance.

http://sherweng.com/table.html

We are delighted to welcome Rob along to RADARC for his talk entitled
"Transceiver Performance for the HF Contest and DX Operator".

Topic: RADARC
Time: Jul 22, 2021 20:00 London

Join ZoomGov Meeting

https://forcepoint.zoomgov.com/j/1604700436?pwd=OGk1ZEU3YXkwSGZOS05vVTgwUUNhdz09

Meeting ID: 160 470 0436
Passcode: 816574 (you shouldn't need this)

The talk is a real tour-de-force of analysis of transceiver performance,
clearly presented and also looking in depth at several modern
transceivers.

Rob is one of the world's foremost radio amateurs:

"Ham radio began for me in 1961 in Cincinnati, Ohio, as both a novice
and general-class operator. After graduating college in 1969 with a
degree in physics, I moved to Denverand worked for KOA radio as an
engineer until 1987. While at KOA, I maintained their 50 KW AM and FM
transmitters, microwave links and studio equipment.

1974 saw the beginning of Sherwood Engineering, offering roofing filters
and upgrade kits for the Drake R-4C. In 1976 I started measuring
receiver performance on dozens of radios, since reviews in QST did not
correlate with actual on-air observations at crunch time in CW contests.
In 1977 “ham radio magazine” published the first of several of my
articles on receiver problems and cures, vertical antenna ground systems
and mobile antenna efficiency. Those articles are available on my web
site as PDF files. Receiver test data is now web based with 150
transceiver and receiver listings.

www.nc0b.com/table.html.

In the 80s I was invited to be a forum speaker at the Dayton Hamvention
on several occasions, discussing both receiver and antenna performance
issues. In 2004 I returned to the Dayton Contest Forum, giving a talk on
the status of receivers both old and new, with special emphasis on the
Orion and the Icom 7800. In 2007 the Drake Forum had me present a talk
on the pros and cons of the new batch of DSP transceivers. In 2009 I
made a presentation at the Dayton Hamvention Antenna Forum on ground
systems for vertical antennas.

Fourteen years ago, my XYL encouraged me to build my dream contest
station on 10 acres east of Ft. Collins, Colorado on the Pawnee
Grassland. This has made it possible to evaluate top transceivers in
major contests in a real-world environment to augment mylaboratory data.
This rural setting has allowed me to focus my interest on effective
antennas. Six towers support 9 mono-band HF Yagis, plus 6m, 2m and 70cm
Yagis, pluswire antennas for 160, 40 and 30 meters.A recent project was
operating on the new 475 kHz band with a 160 meter to 630 meter
transverter manufactured in Australia. An IC-7610 on 160 meters handles
receiver and transmit converted to 630m. I use my 160-meter Marconi T
antenna with a separate tuneron 475 kHz."

73

John
G4RDC

[John Gumb]

Folks,

Please find enclosed the slides from 22nd July meeting Transceiver Performance for the HF Contest and DX Operator" by Rob Sherwood, NC0B.
We are working to get the zoom recording up on YouTube.

Great to see so many of you last night at the Rugby club.

73

John
G4RDC

. 
 
In the 80s I was invited to be a forum speaker at the Dayton Hamvention
on several occasions, discussing both receiver and antenna performance
issues. In 2004 I returned to the Dayton Contest Forum, giving a talk on
the status of receivers both old and new, with special emphasis on the
Orion and the Icom 7800. In 2007 the Drake Forum had me present a talk
on the pros and cons of the new batch of DSP transceivers. In 2009 I
made a presentation at the Dayton Hamvention Antenna Forum on ground
systems for vertical antennas. 
 
Fourteen years ago, my XYL encouraged me to build my dream contest
station on 10 acres east of Ft. Collins, Colorado on the Pawnee
Grassland. This has made it possible to evaluate top transceivers in
major contests in a real-world environment to augment mylaboratory data.
This rural setting has allowed me to focus my interest on effective
antennas. Six towers support 9 mono-band HF Yagis, plus 6m, 2m and 70cm
Yagis, pluswire antennas for 160, 40 and 30 meters.A recent project was
operating on the new 475 kHz band with a 160 meter to 630 meter
transverter manufactured in Australia. An IC-7610 on 160 meters handles
receiver and transmit converted to 630m. I use my 160-meter Marconi T
antenna with a separate tuneron 475 kHz."

73

John
G4RDC

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