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F8BOE > PACKET 28.01.05 06:55l 43 Lines 1789 Bytes #999 (300) @ WW
BID : S1FF6KDL_004
Read: DG5YM GUEST DL7ALE OE7FMI
Subj: Sound1-5 info
Path: DB0FHN<DB0RGB<DB0MRW<DB0FSG<HB9EAS<F6KDL
Sent: 050128/0522z @:F6KDL.FCAL.FRA.EU [OpenBCM] obcm1.06b42 LT:300
From: F8BOE @ F6KDL.FCAL.FRA.EU (Olivier)
To: PACKET @ WW
X-Info: No login password
Hello,
Sound1-5 are RAR compressed JPEG pictures of my home brewed soundcard
interface, which can be connected to virtually every transceiver ever made.
Computer and transceiver are insulated by optocouplers on the COM port's side
and 600 Ohms transformers on the audio side. PTT and audio circuitry are
mounted on veroboard style PC boards in the traditional "Ugly Tech" way.
For demo purposes, an external speaker or head phones can be plugged in and
can monitor either the right or the left computer's line-out channel for
EHSCW or MS programs for example.
DTR and RTS signals are separated too and can be switched for computer keyed
CW using the transceiver's MOX and CW key plugs together allowing semi
break-in on older transceivers.
This soundcard interface is not only intended for packet but is used for
other digimodes such as RTTY and SSTV. It can also be used to link a
transceiver and a computer for Echolink or phonepatch applications.
I picked up some ideas on F6CRP's homepage at:
http://perso.wanadoo.fr/f6crp/
I also had another souncard interface project, using both audio channels to
connect to two separate transceivers... Tests are running to optimize it's
performance for 9k6 soundcard packet; the problem is that the only program
that seems to be able to run AX25 on two audio channels is AGWPE, which is
far away from beeing the best choice for reliable packet data transfer.
More about this second soundcard interface project later...73 de F8BOE Olivier ...-.-
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