There was a mistake in the Argosy manual about aligning the carrier
oscillator frequencies. In my 525D manual for the Argosy II on page 3-18 in
the section "Carrier Oscillator Alignment" step 4.) is incorrect. It ought
to read as follows:
4.) Set the MODE switch to SB-N and adjust C3 for a frequency of 9.00000
MHz.
(Note that the original text "...adjust C2..." is incorrect.) I believe
this may well account for the problem you are having with your offset tuning
control.
Free but unrelated advice: There is a 9MHz trap in that rig. Unless the
sun comes up in the West, don't mess with it!!
Again, please advise your success or lack thereof.
73, Mike N4NT
----- Original Message -----
From: "scott sheppard" <scottsheppard@videotron.ca>
To: "Mike Hyder -N4NT-" <Mike_N4NT@charter.net>
Sent: Saturday, November 13, 2010 3:01 PM
Subject: Re: [TenTec] Argosy 525 offset for CW ...issues
hi Mike
Well, after playing with that POT it did work--bbut only for a given
sideband--ie, cw could be zeroed in for 80. 40 but the usb side was off by
double that. As well, all side bands were messed up too. So, I have it
back
to where it was--all sidebands, LSB and USB lined up but I have to adjust
for cw by about 2 notches...its got me wondering...
cheers
scott
----- Original Message -----
From: "Mike Hyder -N4NT-" <Mike_N4NT@charter.net>
To: "scott sheppard" <scottsheppard@videotron.ca>
Sent: Friday, November 12, 2010 6:39 AM
Subject: Re: [TenTec] Argosy 525 offset for CW ...issues
Please let me know how you fare with the rig.
73, Mike N4NT
----- Original Message -----
From: "scott sheppard" <scottsheppard@videotron.ca>
To: "'Mike Hyder -N4NT-'" <Mike_N4NT@charter.net>; "'Discussion of
Ten-Tec
Equipment'" <tentec@contesting.com>
Sent: Thursday, November 11, 2010 5:01 PM
Subject: Re: [TenTec] Argosy 525 offset for CW ...issues
Thanks Mike...I will try that POT...and your idea re: cut off on the
filter is along the same lines as to what I was thinking...especially
since the ssb power output (heard) is lower as well...a friend is
bringing over his IFR so I will have a go at that too.
Cheers
scott
-----Original Message-----
From: Mike Hyder -N4NT- [mailto:Mike_N4NT@charter.net]
Sent: Thursday, November 11, 2010 4:18 PM
To: Discussion of Ten-Tec Equipment
Cc: scott sheppard
Subject: Re: [TenTec] Argosy 525 offset for CW ...issues
In every rig I've owned there was an internal pot which balanced the
offset
pot on the panel between transmit and receive. The Argosy II manual
shows
the Control Board 80781 on page 3-25. My best guesstimate in that R1 on
that board is that pot. I'd give it a go. I might even phone Ten-Tec
to
get their advice as I can find nothing in the manual about adjusting the
pot.
About the power's being lower with the 8-pole filter, two things come to
mind: first, is it a Ten-Tec filter; and second, if your carrier
oscillator
is not properly adjusted, the narrower skirts of the 8-pole filter may
be
attenuating your signal.
73, Mike N4NT
----- Original Message -----
From: "scott sheppard" <scottsheppard@videotron.ca>
To: <tentec@contesting.com>
Sent: Thursday, November 11, 2010 3:03 PM
Subject: [TenTec] Argosy 525 offset for CW ...issues
Hello all
I am in the midst of tuning up an older argosy I recently acquired.
While I have a bit left to do, most of it is done and it is working. I
am curious if anyone has any insight into a few issues I have as yet
unresolved:
1) Offset tuning. As it stands, on SSB the rig works fine.I listen on
the same freq as I Tx without any adjustment. On CW, however, I have
to crank the offset about 2 clicks to the left for 40m, 80m etc and on
CW 14 mhz, 2 clicks to the right in order to hear where I am txing.I
have looked in the manual but cant find the specific area where this
would be aligned. Obviously a usb/lsb issue as they are identical yet
oposite offsets.
2) I also note that my low power output position, when chosen
(bypasses final PA) is significantly lower with the 8 pole filter as
opposed to the stock 4 pole. The 4 pole is about 4-5 watts out while
the 8 pole is about 2 watts.
Appreciate any feedback.
73 scott VA3IED
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