| |
ZL3AI > APRDIG 22.06.03 08:51l 267 Lines 9777 Bytes #999 (0) @ WW
BID : 1511-ZL3AI
Read: GUEST
Subj: TAPR Digest, Jun 19, 1/3
Path: DB0FHN<DB0RGB<OK0PPL<RZ6HXA<IK1ZNW<ON0AR<VK6HGR<ZL2BAU<ZL3VML
Sent: 030621/1325Z @:ZL3VML.#80.NZL.OC #:2803 [Chch-NZ] FBB7.00i $:1511-ZL3AI
From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Thursday, June 19, 2003.
1. Re: RS 5/8 wave mag mount
2. RE: FD Wind Power. The rest of the story...
3. 73 Magazine
4. End of water pumps!
5. Re: End of water pumps!
6. Re: End of water pumps!
7. Re: End of water pumps!
8. Re: aprssig digest: June 15, 2003
9. Re: aprssig digest: June 15, 2003
10. GLOBAL VOICE ALERT settings
11. Re: End of water pumps!
12. Re: GLOBAL VOICE ALERT settings
13. Real Water Power... (Link to Photos)
14. Re: End of water pumps!
15. New Tripmate USB with DB9 Serial Cable
16. Re: New Tripmate USB with DB9 Serial Cable
17. Re: New Tripmate USB with DB9 Serial Cable
18. Re: New Tripmate USB with DB9 Serial Cable
19. RE: New Tripmate USB with DB9 Serial Cable
20. Re: New Tripmate USB with DB9 Serial Cable
21. WinAprs and PMapping 5.0
22. RE: New Tripmate USB with DB9 Serial Cable
23. Re: WinAprs and PMapping 5.0
24. New EARTHMATE USB with DB9 Serial Cable
25. APRS+SA help
26. Stupid Question Time; IC-746 "Pro"
----------------------------------------------------------------------
Subject: Re: RS 5/8 wave mag mount
From: "Scott Miller" <scott@home.miller.org>
Date: Wed, 18 Jun 2003 21:42:10 -0700
X-Message-Number: 1
[commercial content deleted]
Bob, on the Rino decoding thing - the link to the .wav file seems to be
broken. Got another one? Got any plots of it in the frequency domain?
I understand Garmin's not being very forthcoming about the protocol details.
What is their legal response likely to be if and when someone publishes it
on their own? Are they going to find some way to invoke the DMCA or
something? Maybe we should let Henk do it. (Sorry, Henk - you won't be
able to attend DCC. Or set foot on US soil, for that matter. =]) For
anyone who doesn't know what I'm talking about, see
http://www.freesklyarov.org/.
Scott
N1VG
----------------------------------------------------------------------
Subject: RE: FD Wind Power. The rest of the story...
From: "Scott Miller" <scott@home.miller.org>
Date: Wed, 18 Jun 2003 21:48:43 -0700
X-Message-Number: 2
Sorry Bob, but after that story I'm pretty much convinced that you ARE
crazy. =]
Scott
----------------------------------------------------------------------
Subject: 73 Magazine
From: "Richard Morrall" <richard.morrall@llcag.co.uk>
Date: Thu, 19 Jun 2003 10:43:13 +0100
X-Message-Number: 3
I am looking for a copy of an article in 73 Magazine from July/Aug/Sept 1997
in K0OV's Homming In Column about a "Northscope". If anyone could scan these
pages and send them to me I would be greatful as I have had no luck finding
the magazine here in the UK.
Regards, Rich G8ZHA
----------------------------------------------------------------------
Subject: End of water pumps!
From: Bob Bruninga <bruninga@usna.edu>
Date: Thu, 19 Jun 2003 07:02:54 -0400 (EDT)
X-Message-Number: 4
Last post on Water pump! (my apologies to the group).
Of course, inherent in any use of a pump impeller as a turbine is the
assumption that the pump is worth a darn in the first place.
I finally found a washing machine and got the pump out and it was not at
all what I remembered. If it's efficiency as a "pump" is even 5% I would
be surprised. Of course, this makes sense, because the machine has a 1 HP
motor big enough to spin a 150 lb load of clothes at 900 RPM. Yet the
pump only has the job of raising the water 4 feet to drain the tub.
Thus the Pump (only an accessory on the main belt drive) only has to use a
very small protion of the 1 Hp energy to do its job. Open it up, and it
has a tiny impeller with huge clearances all around, and half of its vanes
eliminated. This is so inefficient, but designed that way. If it was a
highly efficient pump, it would drain the tub in 3 seconds and squirt the
water 100 feet, blowing the drain line out of your pipe!
So, everyone who had seen one before and said a washing machine pump
impeller wont work as a turbine were absolutely right! End of that story.
Back under my rock until I find a "real" pump...
Bob
----------------------------------------------------------------------
Subject: Re: End of water pumps!
From: "Mike Yetsko" <myetsko@insydesw.com>
Date: Thu, 19 Jun 2003 07:21:16 -0400
X-Message-Number: 5
You know, a dishwasher has to pump water around at pressure....
----------------------------------------------------------------------
Subject: Re: End of water pumps!
From: wes@johnston.net
Date: Thu, 19 Jun 2003 10:33:22 -0400 (EDT)
X-Message-Number: 6
On Thu, 19 Jun 2003 07:21:16 -0400, "Mike Yetsko" wrote:
I was kinda wondering what a bicycle rim with cups mounted around it's
circumference would do.... Some even have multiple sprockets to adjust
speed/torque... and a 3 speed bike has an internally adjustable gear ratio
(less places to get fingers caught).
Wes
>You know, a dishwasher has to pump water around at pressure....
----------------------------------------------------------------------
Subject: Re: End of water pumps!
From: Tad Burnett <tburnett@vermontel.net>
Date: Thu, 19 Jun 2003 10:41:24 -0400
X-Message-Number: 7
Hey Mister Navy guy !!!
My girfriend who has been reading this thread over my shoulder and at
one point in her life had a job assembling bilge pumps and she wants
to know if one of them would work...
She says the kind she made were rated at 1500 GPH, and the pump spun
with no friction which means it wasnt the rubber impeller type that would
have too much friction and she said it attracted a screw driver with no
power applied which sounds like a PM type motor....
And its direct drive too, reducing the belt friction..
I can't tell her why that wouldn't work....But I was a Air Force guy
and I don't alow any powered equipment aboard my 19 foot sailboat..
Tad N1QAG
----------------------------------------------------------------------
Subject: Re: aprssig digest: June 15, 2003
From: Henk de Groot <henk.de.groot@hetnet.nl>
Date: Thu, 19 Jun 2003 16:51:33 +0200
X-Message-Number: 8
Hello Bob,
At 15:28 18-6-03 -0400, Bob Bruninga wrote:
>Woaha... You always should put your APRS on BAND-A and use the more
>universal BAND-B for all other operating. I wont belabor it here, but
>there are lots of good reasons for doing this. Is Europe using band B
>for APRS? Or just you?
It depends! Currently I use band A for APRS since I need band B for PI2APD,
the local 70 cm repeater we use for local voice contacts about APRS and
Packet. Sometimes however I want to use APRS on 430.5125, the 70 cm APRS
frequency and then I obviously have to switch to band B for APRS. When I
switch a lot between APRS on 70 cm and APRS on 2 m I keep the databand on
side B.
I have not measured it, but I have the impression that band A is more
sensitive, so when I need that for voice I switch also.
Bottom line, I do not have a fixed assignment but switch the databand
depending on what I want to do. Most of the time I have APRS on band A
however. I have no idea what settings other users use in general on their
TH-D7's.
Kind regards,
Henk.
----------------------------------------------------------------------
Subject: Re: aprssig digest: June 15, 2003
From: Henk de Groot <henk.de.groot@hetnet.nl>
Date: Thu, 19 Jun 2003 17:11:26 +0200
X-Message-Number: 9
Hello Mike,
At 14:53 18-6-03 -0400, Mike Yetsko wrote:
>'mute' the audio. But they don't mute the audio 'right there'. Instead
>the audio that goes to the DTMF detection circuitry is also routed to
>a delay line that has a delay long enough to allow the detection circuit
>to activate while the tone is still in the 'delay'.
>
>You can see why that's not practical to do in an HT!
Well, the TH-D7 is full of software and what could have been done is delay
"squelch open" for a few milliseconds until a stable positive go/nogo is
reliably received from the CTCSS decoder. I think delay of the complete
audio signal is a bit overkill.
By the way, I know how funny it is to hear a delayed signal, try to sing a
song while you can only hear a delayed feedback, good luck...
Anyway, seems to work without this glitch on band A and on band B its okay
most of the time. It is very short and I never saw this as a problem, only
now that it is mentioned I just wanted to confirm that this happens to me
too. Maybe setting the sequelsh to the most insensitive setting also fixes
it, I never tried.
Kind regards,
Henk.
----------------------------------------------------------------------
Subject: GLOBAL VOICE ALERT settings
From: "Demetre Valaris" <sv1uy@sv1uy.ampr.org>
Date: Thu, 19 Jun 2003 18:53:01 +0300
X-Message-Number: 10
>Subject: Re: aprssig digest: June 15, 2003
>From: Bob Bruninga <bruninga@usna.edu>
>Date: Wed, 18 Jun 2003 15:28:28 -0400 (EDT)
>You know, that would be PERFECT! I should have thought of that the first
>time. If I had it to do over, I would choose 88.5 Hz... but probably too
>late to change now.... but since most people still arent using Voice
>Alert, maybe now IS the time to change... to a global 88.5?
>
>Bob
Hi Bob,
Good idea to have a global VOICE ALERT setting but I think another subtone,
such as 77 Hz (as Henk proposed) would be a better idea since many home
stations use 88.5 HZ, at least in Europe, to access their local repeater and
when these home stations switch onto APRS mode on VHF perhaps they will forget
to switch off their 88.5 HZ setting. As a result many might start
transmitting APRS PACKETS with VOICE ALERT mode enabled from their home
stations. This is something we do not want!
===
73 de Demetre SV1UY
e-mail: sv1uy at sv1uy.ampr.org
PACKET MAIL: SV1UY@SV1UY.ATH.GRC.EURO
http://www.athnet.ampr.org/~sv1uy
----------------------------------------------------------------------
Read previous mail | Read next mail
| |
