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PA2AGA > HDDIG 01.07.00 14:54l 236 Lines 7604 Bytes #-9416 (0) @ EU
BID : HD_2000_173C
Read: GUEST
Subj: HamDigitalDigest 2000/173C
Path: DB0AAB<DB0FSG<DB0SL<DB0RGB<DB0MRW<DB0ERF<DB0BRI<DB0SM<PI8DAZ<PI8GCB<
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Sent: 000701/0106Z @:PI8HGL.#ZH1.NLD.EU #:57088 [Den Haag] FBB $:HD_2000_173C
From: PA2AGA@PI8HGL.#ZH1.NLD.EU
To : HDDIG@EU
Date: Sat, 01 Jul 00 01:50:09 MET
Message-Id: <hd_2000_173C>
From: pa2aga@pe1mvx.ampr.org
To: hd_broadcast@pa2aga.ampr.org
X-BBS-Msg-Type: B
circuit diagram or repairer this side of USA.
I will refund costs etc. Thanks, Mick. G4RMN
mlhogan@lineone.net
------------------------------
Date: Sat, 24 Jun 2000 20:28:49 GMT
From: nomail@rob.knoware.nl (Rob Janssen)
Subject: DRSI 2
Michael Hogan <mlhogan@lineone.net> wrote:
>I have a receive fault on my PCPA type 2 (DRSI) card. Port 1 works
>perfectly. The fault is on port 0. TX works ok but even though the RX LED
>lights there is no RX data to the PC.
>I have tried the loop-back tests, using the THS program, with the same
>result. I have also tried adjusting the RX sensetivety with no effect.
>I have tried to find Siskin, who serviced these units in the past, with no
>success. DRSI no longer support amateur equipment.
>I would appreciate any information on this TNC, likely cause and fix,
>circuit diagram or repairer this side of USA.
I do have the schematics, but not in mailable format. And I don't know if
I am supposed to forward these, I got them from DRSI when I was writing the
driver for this card.
The type 2 has two TCM3105 modems. Port 0 uses U8 and associated
components. You say the RX LED lights, I presume you mean D6, the DCD 0
LED.
Check if demodulated data appears at TP2. This should also appear at pin
13 of U13. Also check if the same signal als the LED (DCD) appears on pin
19 of U13.
When U8 and U12 are socketed, try swapping them.
Rob
--
+----------------------------------+--------------------------------------+
| Rob Janssen pe1chl@amsat.org | WWW: http://www.knoware.nl/users/rob |
| AMPRnet: rob@pe1chl.ampr.org | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU |
+----------------------------------+--------------------------------------+
------------------------------
Date: Sun, 25 Jun 2000 17:46:58 GMT
From: "D. Stussy" <kd6lvw@bde-arc.ampr.org>
Subject: DRSI 2
Also check your cable for fault on the RX-Audio wire.
On Sat, 24 Jun 2000, Rob Janssen wrote:
> Michael Hogan <mlhogan@lineone.net> wrote:
> >I have a receive fault on my PCPA type 2 (DRSI) card. Port 1 works
> >perfectly. The fault is on port 0. TX works ok but even though the RX LED
> >lights there is no RX data to the PC.
>
> >I have tried the loop-back tests, using the THS program, with the same
> >result. I have also tried adjusting the RX sensetivety with no effect.
>
> >I have tried to find Siskin, who serviced these units in the past, with no
> >success. DRSI no longer support amateur equipment.
>
> >I would appreciate any information on this TNC, likely cause and fix,
> >circuit diagram or repairer this side of USA.
>
> I do have the schematics, but not in mailable format. And I don't know if
> I am supposed to forward these, I got them from DRSI when I was writing the
> driver for this card.
>
> The type 2 has two TCM3105 modems. Port 0 uses U8 and associated
> components. You say the RX LED lights, I presume you mean D6, the DCD 0
> LED.
> Check if demodulated data appears at TP2. This should also appear at pin
> 13 of U13. Also check if the same signal als the LED (DCD) appears on pin
> 19 of U13.
>
> When U8 and U12 are socketed, try swapping them.
------------------------------
Date: Wed, 21 Jun 2000 18:33:30 GMT
From: haynes@alumni.uark.edu (Jim Haynes)
Subject: Experimental HF RTTY Transmissions
In article <394f9494.5335057@news.gradwell.net>, JimD <JimD> wrote:
>
>Why?
>
>60 wpm??? Do you mean 45.45 bauds?
>
Yes, I should have been more precise.
The why is that the guy who is doing this is connected with a TTY
museum, and is trying to bring back something for RTTY SWLs to copy
as existed back in the 1950s. At least that's my understanding.
Probably his website www.rtty.com has a better explanation.
------------------------------
Date: Wed, 21 Jun 2000 20:59:39 -0500
From: Butch Magee <butchkay@netdoor.com>
Subject: Experimental HF RTTY Transmissions
We need a schedule bubba. Would enjoy listening for him, but I can't
reply, don't think the law lets me operate there.
Butch KF5DE
Jim Haynes wrote:
> Experimental station WA9XHN, Auburn, WA is from time to time running
> RTTY at 60WPM, 170 Hz shift on 13972 or 6994 KHz.
------------------------------
Date: Wed, 21 Jun 2000 21:54:02 -0400
From: Ralph Mowery <rmowery@dialpoint.net>
Subject: Experimental HF RTTY Transmissions
Real RTTY men talk in WPM or OPM. That would be 368 operations per
minute for 60 WPM.
I think bauds came in with the computer.
Jim Haynes wrote:
>
> In article <394f9494.5335057@news.gradwell.net>, JimD <JimD> wrote:
> >
> >Why?
> >
> >60 wpm??? Do you mean 45.45 bauds?
> >
>
> Yes, I should have been more precise.
>
> The why is that the guy who is doing this is connected with a TTY
> museum, and is trying to bring back something for RTTY SWLs to copy
> as existed back in the 1950s. At least that's my understanding.
> Probably his website www.rtty.com has a better explanation.
------------------------------
Date: Thu, 22 Jun 2000 18:12:01 GMT
From: dynastic@REMOVE_THIScwcom.net (JimD)
Subject: Experimental HF RTTY Transmissions
On Wed, 21 Jun 2000 21:54:02 -0400, Ralph Mowery <rmowery@dialpoint.net>
wrote:
>Real RTTY men talk in WPM or OPM. That would be 368 operations per
>minute for 60 WPM.
>I think bauds came in with the computer.
Indeed. We used WPM in the RAF in the late '50s. The European
50-baud speed was 66.6 WPM.
>Jim Haynes wrote:
>>
>> In article <394f9494.5335057@news.gradwell.net>, JimD <JimD> wrote:
>> >
>> >Why?
>> >
>> >60 wpm??? Do you mean 45.45 bauds?
>> >
>>
>> Yes, I should have been more precise.
>>
>> The why is that the guy who is doing this is connected with a TTY
>> museum, and is trying to bring back something for RTTY SWLs to copy
>> as existed back in the 1950s. At least that's my understanding.
>> Probably his website www.rtty.com has a better explanation.
All OK now, thanks for the information. Although I didn't see my
original post appear here, Perhaps I should have asked 'why 13
and 6 MHz?'
--
Posted by G4RGA.
g4rga at thersgb.net
Rallies Info: http://website.lineone.net/~nordland
http://www.netcomuk.co.uk/~amadeus
------------------------------
Date: Fri, 23 Jun 2000 01:04:45 GMT
From: matt weber <mattheww50@home.com>
Subject: Experimental HF RTTY Transmissions
On Thu, 22 Jun 2000 18:12:01 GMT, dynastic@REMOVE_THIScwcom.net (JimD)
wrote:
>On Wed, 21 Jun 2000 21:54:02 -0400, Ralph Mowery <rmowery@dialpoint.net>
wrote:
>
>>Real RTTY men talk in WPM or OPM. That would be 368 operations per
>>minute for 60 WPM.
>>I think bauds came in with the computer.
>
>Indeed. We used WPM in the RAF in the late '50s. The European
>50-baud speed was 66.6 WPM.
>
Baud really is a telegraphy term, and it refers to a switching rate.
Words per minute is confusing become most low speed TTY is 6 level,
usually baudot, where as 100wpm and up is usually 8 level Ascii, which
with the requisite start and stop bits is 110 baud.
Baud does not necessarily mean bits per second. Technically 2400
baud is as fast as a phone line will go, beyond that it is bits per
second because it isn't a switch rate, the data is in fact transmitted
by phase modulation. At 110baud, the data is sent by frequency shift
keying.
------------------------------
Date: Fri, 23 Jun 2000 17:35:54 GMT
From: dynastic@REMOVE_THIScwcom.net (JimD)
Subject: Experimental HF RTTY Transmissions
To be continued in digest: hd_2000_173D
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