I have a 580 delta. You are correct about the RIT. It has a range of +- 1
khz. I have not heard of anyone extending this range. I made an external
VFO for mine to handle split operation. Years ago Tentec was at the
Charlotte Hamfest and had some excess PTO's for sale. I bought 4 of them.
I then took one and added a switching circuit and made a nice external VFO
Also, you are correct about no RF gain control. I have never found this to
be a problem with the delta. The IMD on the Delta is actually quite decent.
The weakest part of the Delta is the AGC. It is audio derived and like all
audio derived AGC's, the attack is never fast enough. This results in a
"pop" when a strong signal suddenly comes on. But all in all, I have found
the delta to be an excellent vacation rig.
Carl Moreschi N4PY
----- Original Message -----
From: "Paul DeWitte K9OT" <email@example.com>
Sent: Friday, June 03, 2005 12:56 PM
Subject: [TenTec] 580 Delta
> For those of you familiar with the 580 Delta, I have a few questions.
> The literature says it has an RIT/TRX of + or - 1 khz.. I would not use
> external VFO and this would not be enough to work up 1-3 split. Has anyone
> tried to make this tune farther than 1 khz?
> I do not see any reference to an RF gain control. That would be a must for
> Since this would be primarily a rig to take on vacation/trips would this
> a good choice? Where we go there is not a lot of 30+ over9 signals, so
> close in imd is not an issue. Size and weight plus performance are the
> Any input positive or negative would be appreciated.
> Thanks 73 Paul K9OT
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