Roofing Filters, Transmitted IMD & Receiver Performance

[g4tut]

Roofing Filters, Transmitted IMD & Receiver Performance

Rob Sherwood's recent presentation to the Boulder Amateur Radio Club is now available on the web.

This is a good primer for anyone interested in receiver performance and transmitted IMD.

Presentation PowerPoint
http://www.sherweng.com/documents/Barc2008.ppt

MP3 Audio of Presentation
http://www.sherweng.com/audio/Barc-Edited.mp3

Sherwood Engineering Inc.
http://www.sherweng.com/

Boulder Amateur Radio Club
http://www.qsl.net/w0dk/







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[NL7W]

Roofing Filters, Transmitted IMD & Receiver Performance

Rob Sherwood's recent presentation to the Boulder Amateur Radio Club is now available on the web.

This is a good primer for anyone interested in receiver performance and transmitted IMD.

Presentation PowerPoint
http://www.sherweng.com/documents/Barc2008.ppt

MP3 Audio of Presentation
http://www.sherweng.com/audio/Barc-Edited.mp3

Sherwood Engineering Inc.
http://www.sherweng.com/

Boulder Amateur Radio Club
http://www.qsl.net/w0dk/







Don't wait all week for the news! (http://www.southgatearc.org/)
Amateur Radio News - updated daily - 365 days per year

Get our News Headlines for your Website:
http://www.southgatearc.org/rss/index.htm

Send Us Your News Items:
http://www.southgatearc.org/news/your_news.htm

Well, what do you know... I knew my trusty TS-850Sat had (has) a great receiver. Rob's testing proves this out. Even with it's less than stellar transmitted IMD performance, I hope it lives through the upcoming cycle peak, for I will put it to use.

Given Rob's numbers, a new Ten-Tec Orion or Omni-VII series radio is in my future also. :)

Thanks for pointing us to these links.

73.

[W0BKR]

I spoke with Rob a number of times and his data provides valuable insight as to which radio may have the better performance. From a contest perspective, even the new FT-2000 et al aren't there.

The trusty TS-850 has yet to be really surpassed.

[K3VR]

I spoke with Rob a number of times and his data provides valuable insight as to which radio may have the better performance. From a contest perspective, even the new FT-2000 et al aren't there. The trusty TS-850 has yet to be really surpassed.

Only the K3, Flex, R4C/Sherwood, Omni 6+, Omni 7, and Orion 2 look better at 2 kHz spacing.

Sherwood Powerpoint Presentation (http://www.sherweng.com/documents/Barc2008.ppt)

[NL7W]

Only the K3, Flex, R4C/Sherwood, Omni 6+, Omni 7, and Orion 2 look better at 2 kHz spacing.

Sherwood Powerpoint Presentation (http://www.sherweng.com/documents/Barc2008.ppt)

Regarding the TS-850S, if only Kenwood would build another equal to or better performing rig, they'd sell like hotcakes. Incorporating the newer receiver front-end design techniques would accomplish this, as well as a quality 50-volt Vcc transmit amplifier section.

Personally, I don't believe Kenwood has the vision or will to do so today. Though, I could be wrong.

[k7duv]

I am keeping my 850. I bought my 850SAT new in 91, and has never skiped a beat. No way will I buy a new rig at todays cost. there is no value in todays rigs vs cost. Today for 12 grand you get a light show, and an ego boost....NOT WORTH IT!:eek: