[hpsdr] Tiny Demeter / Time zones

[Eric Ellison]

Hi Jeroen/all!

'Tiny Demeter' was not discussed during this Teamspeak session. Perhaps
Scotty can comment here and get the creative juices flowing in ASCII.

Let's take a shot at an EU friendly time this Saturday. You 'name it' and
I'll be there! Call it HPSDR EU! Give it in utc and even as a 'time
challenged' person I'll figure it out! (smile). I'll record and post. If
Mike join's he can post. It IS a team effort.

I agree with you on putting everything here on hpsdr. It is the hallmark of
development! I say that with one caveat: When most of the project planning
and discussions have taken place on HPSDR then the project and alpha team
members benefit by being able to 'tweak' the alpha on Teamspeak or other
means. That is very much my own opinion.

I'd like to get Pandora going again, even if just a moderator, not a Project
Leader. I didn't get any discussion on my 'bait'. I think the mechanical
folk in the group can create something worthy of the H in HPSDR! By the end
of the year, I expect we will have Atlas, Janus, Ozy, Penelope, Mercury,
Alex, Gibralter, Pinocchio and (Pheonix)? IMHO: That is a stellar
accomplishment for a cooperative 'loosely formed group of genius folk'! I
also expect that, as has been proven already these will be WORLD CLASS
offerings! The 'best of the best' due to the communications of this group
and even Teamspeak!

Let's go for it! 

Thanks for all the excitement in my old ham radio soul!

Eric - AA4SW


  

-----Original Message-----
From: Jeroen Bastemeijer [mailto:J.Bastemeijer at TUDelft.nl] 
Sent: Monday, June 09, 2008 10:06 AM
To: Eric Ellison
Cc: hpsdr at lists.hpsdr.org
Subject: Re: [hpsdr] Tiny Demeter / Time zones

Eric (and others),

Thank you for your E-mail! I have been listening to the recordings of 
team-speak for about a year now. Indeed the discussions are very 
interesting.

Allthough I'm very often away in the weekends (busy with the 
Scouting/Scout movement) a time somewhere Saturday evening (local time, 
the Netherlands (UTC +1 Hour or 2 Hours)) would be convenient. As the 
HPSDR project is worldwide, it would be nice to know where the 
participants live. Especially in which timezone. Once we have such an 
overview a good proposal could be made for a (or another) teamspeak session.

On the other hand, the recordings of the Teamspeak sessions are very 
valuable (thank you Mike!). The only drawback for a project leader is 
that he/she(?) is missing an opportunity to discuss his/her project. 
Everything should be done by mail or the HPSDR-site.

For now, next thing I will do is downloading the latest teamspeak file 
and listen to the recording. I'm very curious if there was any 
discussion about (Tiny) Demeter.... I will get back to you all,

73 Jeroen PE1RGE



Eric Ellison schreef:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Jeroen
>
> Great! Scotty and I had a really FUN time discussing this. What Scotty was
> planning made a LOT of sense, and probably could be very 'quiet' and
> powerful enough to handle a lot, and plug into the Atlas connector
directly.
>
>
> You are right! Although it is NOT meant to circumvent this list, and is
> almost ALWAYS recorded, Teamspeak can LEAP things forward by 'rapid'
> collaboration. There is MOST definitely a problem with Timezones. TAPR,
> AMSAT, Digital Voice, Astronomy, and other core groups and others use the
> resource productively and Collaborate all the time. The good thing is that
> you DID listen to the audio and posted comments back to the list, so
others,
> if they are interested, can go back and listen.
>
> Actually Phil, Bill, and other HPSDR project leaders, are there virtually
> every week on Sat 01:00 UCT, since the beginning over 3 years ago. It is
> probably the best place to get updates on almost every active HPSDR
project!
> And make contributions. I think the 15 to 25 diehards who come every week
or
> couple of weeks, are attracted, now, by being able to interact or even
> listen to the fantastic HPSDR discussions between Phil  and Bill. Phil is
a
> fantastic designer and even more fantastic educator! He DOES slow down for
> 'turtles' like me, and patiently answers even the most elementary of
> questions!
>
> I would be glad to sponsor a more "EU friendly" time to discuss HPSDR
> projects on Saturday (Early Daytime Eastern Daylight time) if anyone is
> interested. If we do this It would probably be best to favor all US
> timezones and no later than early evening EU on Saturday. I'm open to
> suggestion, and will try to be there.
>
> As a side note, although I am not quite ready to moderate discussion, I am
> planning to get the Pandora project going again. Ben - KD5BYB for very
> understandable personal reasons has communicated that he has had to back
> down as active project leader. This IS open to new project leadership. I
> feel the project is/was quite 'mature' in concepts. There might be someone
> else to take over the project leadership. I will 'stand-in' until someone
> would like to claim project leadership. I talked with Bob - N5BRG at
Dayton
> who has SolidWorks designs for the project which he was working with Ben
as
> it stands. We are having a few problems publishing the files.
>
> HPSDR is Fertile!! You fantastic contributors are 'cultivating' it for a
> fantastic yield! (I'm a farmer at heart!)
>
> Thanks
> Eric - AA4SW
>  
>
>
>
> -----Original Message-----
> From: hpsdr-bounces at lists.hpsdr.org [mailto:hpsdr-bounces at lists.hpsdr.org]
> On Behalf Of Jeroen Bastemeijer
> Sent: Wednesday, June 04, 2008 4:47 PM
> To: hpsdr at lists.hpsdr.org
> Subject: [hpsdr] Tiny Demeter
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Dear All,
>
> I was delighted to hear the name "Demeter" again in the Teamspeak 
> sessions! About a year ago I started a design for the HPSDR power 
> supply. At that time a lot of things were not clear. E.g. how much power 
> is needed, which voltages are really needed to run the HPSDR system.
>
> Due to a lack of time the project moved to the background, however, it 
> never "left" my mind. Continuously I have been searching for 
> information, talking to people, reading publications. Now I finished a 
> number of projects, both work-related and private, I can afford to spend 
> more time on the Demeter project! Because the HPSDR system is getting 
> more mature, it is getting more clear what the demands are for the power 
> supply for the HPSDR.
>
> During the past months, I found out that a switcher can be succesfully 
> used when carefully designed. Furthermore, a good linear regulator can 
> be constructed far better from discrete component (compared to an 
> integrated IC-regulator). Another pro, a discrete regulator will give 
> more flexibility in terms op maximum current (e.g. by adding extra 
> regulating transistors).
>
> In the last Teamspeak-session there was some discussion about a small 
> "experimenters" power supply, to be used in the meantime until Demeter 
> becomes available. I would be very happy if I could offer my help in 
> designing a "Tiny Demeter" (and maybe try some simple concepts?!). 
> However, I found, by listening to the teamspeak sessions, that talking 
> to each other gives better results than sending numerous E-mails. Due to 
> my location (the Netherlands) and time-zone it is difficult to attend 
> the Team-speak sessions. Maybe someone on the list is willing to bring 
> in the Tiny Demeter and Demeter in the discussion to find out what the 
> requirements and wishes are for these units.
>
> As far as I can see the 3.3Volt regulator is not necessary, as each 
> board is creating its own 3.3 and 1.8Volts from the 5 Volts. Maybe, this 
> could be a discussion in the coming Teamspeak session. Another thing 
> which should be defined are the current-requirements for each supply 
> voltage.... I'm very curious if we are able to give a sensible answer to 
> this question at this moment. ;-)  For the power requirements we should 
> disregard any "big" RF power amp, as this probably get its own regulator.
>
> Looking forward to reactions from the list! Hope to get the (Tiny?) 
> Demeter project really going now!
>
> For now, 73 Jeroen PE1RGE
>
>   

-- 
Ing. Jeroen Bastemeijer

Delft University of Technology
Department of Electrical Engineering
Electronic Instrumentation Laboratory
Mekelweg 4, Room 13.090
2628 CD Delft
The Netherlands

Phone: +31.15.27.86542
Fax: +31.15.27.85755
E-mail: J.Bastemeijer at TUDelft.nl
GPS: Lat N52.00002 Lon E4.37157 Alt 46.2m


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