I assume you mean a low pass filter ???
----- Original Message -----
From: "Barry Gross" <barry.n1eu@gmail.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Tuesday, February 14, 2006 9:56 PM
Subject: Re: [TenTec] Orion V2.054 Notes
> Do you know about the requirement to use a high pass filter between the
> Orion and Acom 2000A?
>
> http://www.rfsquared.com/cms-files/Acom-Orion%20Note.html
>
> 73,
> Barry N1EU
>
> On 2/14/06, Kamal Sirageldin <ksira@corpten.com> wrote:
> >
> >
> > I decided to try the V2.054 Beta upgrade. Did the hardware mod for the
> > Sweep (works great).
> >
> > I did seem to find one problem, although I wish I could provide more
> > detailed information to help determine the cause.
> >
> > Since last spring, I have used an Acom 2000A amp with the Orion - no
> > problems. I use V1.372 firmware.
> >
> > After installing V2.054, I cannot key the amp without it throwing the
amp
> > into protection. Can't tell if it is because the initial RF waveform
> > output
> > of the Orion is too high, or if RF is present before the AMP Key line
keys
> > the amp. I use a simple keying cable from the Orion AMP KEY jack to the
> > Acom
> > key line input.
> >
> > The strange thing is that the rig keying throws the amp into protection
> > even
> > when I have the Orion RF output power set to one (1) watt (normally I
> > drive
> > the amp with 42 watts).
> >
> > CW QSK is set for 21%.
> > EXT T/R Delay 1 is set for 23%
> >
> > Something strange is going on - and it's definitely a V2.054 issue, I
> > re-installed 1.372 and things work fine with the amplifier. The 2.054
> > problem with throwing the amplifier into protection is both in CW and
SSB,
> > and on multiple bands.
> >
> > I also noticed that the "MON" seemed to have feedback or was extremely
> > sensitive to level - even when cranked down to a "2". This did not
happen
> > with V1.372 - I probably need to change the mic gain and SP settings to
> > different values for 1.372 vs 2.054. I use a Heil Quietphone Headset
with
> > HC-4 element.
> >
> > I noticed that the Sweep function works great in V2.054.
> > Appreciate how compressed some of the setup knob turning is with 2.054.
> > Setting AGC Threshold is no longer an endless knob turning affair.
> > The audio fidelity in 2.054 does not distort with very strong signals
like
> > it sometimes did in 1.372. Good job.
> > I'm not sure, but the receive audio sounds smoother in 2.054.
> > Screen display seems crisper too.
> > S-Meter is definitely more generous with strong signals. Never seen so
> > many
> > needle pinning signals.
> >
> > Re-installed 1.372 so I could use the amp, but looks like lots of nice
> > touches in V2.054.
> >
> > 73 Kam N3KS
> >
> >
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> >
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