|To:||KC2RVD@arrl.net,Discussion of Ten-Tec Equipment <email@example.com>|
|Subject:||Re: [TenTec] Triton IV with digital modes|
|Reply-to:||firstname.lastname@example.org,Discussion of Ten-Tec Equipment <email@example.com>|
|Date:||Wed, 26 Dec 2007 18:29:59 -0600|
I question whether the Triton's stable enough for sliver narrow PSK, but
it sounds like|
you're driving the Triton so hard that the supply is nervously approaching the current limit
It might become unstable enough to cause frequency modulation of the transmitter. If there is a
radical DC instability, any dampening caps or voltage amplifier circuitry between the meter
and VSWR detector might be cycling and holding up enough voltage across the meter
coil to cause the erratic deflection.
If you are running the AFSK signal into the mic jack, set the drive up to the normal SSB mode
setting, then regulate the transmitter to about 25W by adjusting the COMPUTER audio level out.
If you can't get the computer audio level output down low enough to properly drive
the transmitter, you may have to stick a 10dB pad between the computer out and mic in,
as the computer level will often be significantly higher and too low an impedance than what
the transmitter would like to see to develop PEP. A 10:1 T-pad should take care of both, and
help produce distortion free AFSK sigs. Effective PSK RF power levels are typically between
QRP to 30W.
Louis Ciotti (KC2RVD) wrote:
I have been using my Triton IV with PSK31 and RTTY over the past few weeks, and occasionally something odd happens.
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