[NSRCA-discussion] RX choices
george w. kennie
geobet at gis.net
Fri Sep 15 10:26:37 AKDT 2006
Boy, I can't wait for that one !!!!!!! I used to date Hedi and she never
mentioned anything about DSS to me. I guess it's always been on the
hush-hush.
G.
----- Original Message -----
From: "Dean Pappas" <d.pappas at kodeos.com>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Friday, September 15, 2006 11:34 AM
Subject: Re: [NSRCA-discussion] RX choices
> It's even wierder than that, and I am just too busy right now.
> Later, I promise,
> Dean
>
> Dean Pappas
> Sr. Design Engineer
> Kodeos Communications
> 111 Corporate Blvd.
> South Plainfield, N.J. 07080
> (908) 222-7817 phone
> (908) 222-2392 fax
> d.pappas at kodeos.com
>
>
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org
> [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of
> dwaynenancy
> Sent: Friday, September 15, 2006 11:29 AM
> To: NSRCA Mailing List
> Subject: Re: [NSRCA-discussion] RX choices
>
>
> Yep, she had a patent on the method. It seems she got the idea while
> playing a piano. Dwayne
>
> Dean Pappas wrote:
>
>> Even the latest Spektrum DSS system is just narrow-band FM!
>> How that works is an even better story, especially because it involves
>> Hedi Lamarr!
>> later,
>> Dean
>>
>>
>> Dean Pappas
>> Sr. Design Engineer
>> Kodeos Communications
>> 111 Corporate Blvd.
>> South Plainfield, N.J. 07080
>> (908) 222-7817 phone
>> (908) 222-2392 fax
>> d.pappas at kodeos.com
>>
>> -----Original Message-----
>> *From:* nsrca-discussion-bounces at lists.nsrca.org
>> [mailto:nsrca-discussion-bounces at lists.nsrca.org]*On Behalf Of
>> *Bob Richards
>> *Sent:* Friday, September 15, 2006 11:17 AM
>> *To:* NSRCA Mailing List
>> *Subject:* Re: [NSRCA-discussion] RX choices
>>
>> John,
>>
>> I'm not surprised the manufacturers keep the PCM information (like
>> packet specification, operating parameters, etc) private. For
>> one, that information could be considered a trade secret and they
>> would not want competitors to know about it. On the other hand,
>> they might be worried that a competitor would examine the data and
>> discover some flaw or limitation in the technology and then
>> publicly announce this fact. Still, I'm surprised no one has
>> reverse engineered the PCM data stream from either JR or Futaba
>> (maybe someone has, I just don't know).
>>
>> I'll take some issue with what you have said regarding the
>> technology not changing since the '50s. I believe the '50s saw
>> super-regen systems? After that, there was (is) super-heterodyne
>> systems. Then, dual conversion and narrow band systems, as well as
>> FM instead of AM. PCM was added (really nothing to do with the
>> RF, just a data link added to the existing RF systems). I think
>> the systems today are more reliable than in the 70s when I first
>> started, and they are having to do this in a much more polluted RF
>> environment.
>>
>> Still, I agree with you that, as a group (modelers in general), we
>> have not done a good job demanding more from the manufacturers.
>> For most, cost seems to be the big issue, but we don't look at
>> cost in terms of the big picture, like "a cheap receiver will cost
>> you a lot AFTER you buy it". Those of us that are competitors do
>> a better job demanding more, IMHO.
>>
>> Bob R.
>>
>>
>> */John Ferrell <johnferrell at earthlink.net>/* wrote:
>>
>> Although I fly Futaba I have a lot of respect for the JR receiver
>> technology. It is the only thing new in receiver design other
>> than the
>> Futaba synthesized receiver since the early 1950's. The
>> technology made the
>> change to solid state but that was not taking advantage of any
>> new design.
>>
>> I can assure you that Ham radio receivers have made steady
>> progress during
>> that time even as prices came down.
>>
>> The bigger problem is that we have no idea about the real
>> specs on these
>> receivers. The maintenance information is held very close and
>> parts even
>> closer. We have no idea how long it takes to cycle in and out
>> of fail safe
>> let alone any control over it. In fact we have no real
>> indicator of failure
>> thresholds. George Steiner has done a lot of work in this area
>> such as his
>> "missing frames" detector but his work has been hampered by
>> lack of
>> published specs by the manufactures with PCM.
>>
>> I had hopes of improvements when HiTec swallowed Multiplex but
>> it seems to
>> me they have only used the acquisition to leverage their
>> efforts to become
>> another Futaba/JR/Airtronix.
>>
>> We have not been demanding customers and we have put way too
>> much faith in
>> letting the suppliers make decisions for us!
>> John Ferrell W8CCW
>> "My Competition is not my enemy"
>> http://DixieNC.US
>>
>> ----- Original Message -----
>> From: "Ed Alt"
>> To:
>> Sent: Thursday, September 14, 2006 5:02 PM
>> Subject: Re: [NSRCA-discussion] RX choices
>>
>>
>> >
>> > Yep, I've been flying JR single conversion ABC&W sine the
>> late 90's in
>> > quite
>> > a number of different locations around the country and have
>> never, not
>> > once
>> > had the slightest indication of a problem. Lot's of time
>> with ignition
>> > systems too. Must be some other cheesy single conversion
>> receiver?
>> >
>> > Ed
>> >
>>
>>
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