I recently sold my at-250 to a fellow who wants to use it with a ts
830.

I sent him the connection diagram in advance via email, and sent the
manual with the tuner.
He says it doesn't work.

I found out he did not make the cable as he says it should be r.f.
sensing and should work without any connection.

Another fellow told me he is correct.

I dont remember this feature. My recollection is that the tuner must be
triggered by the radio.

Am I correct, or is the at-250 r.f. sensing and will work with ANY rig
without connection?(other than coax of course)

Thanks to you all.

K8VF

I am receiveing answers off forum which indicate YES and NO.

Does ANYONE have an AT-250 which they can hook up WITHOUT any
d.i.n.cable to verify if it will operate as a tuner- r.f. sensing?

The manual (such as it is) is very much lacking in this area.

I have used it with the 430, and with other rigs WITH the d.i.n. cable.
It works fine.

My question is: Will the AT-250 operate with only a coax connection
and d.c. connection and tune from the signal it gets from the
transmitter?

Thanks again.
k8vf

In article .com,
wrote:

I am receiveing answers off forum which indicate YES and NO.

Does ANYONE have an AT-250 which they can hook up WITHOUT any
d.i.n.cable to verify if it will operate as a tuner- r.f. sensing?

The manual (such as it is) is very much lacking in this area.

k8vf-

This is an interesting question. I thought the AT-250 was so old it
couldn't possibly be auto-sensing. I found a portion of the manual at
www.mods.dk, and agree that it isn't clear about it.

A box called "TUNE switch" says to tune the antenna and then turn the TUNE
Switch off. It also says that after tuning is complete, the motor may
activate during operation if you leave the TUNE switch ON. This suggests
that it does have auto-sensing of a sort.

HOWEVER, the "CAUTION" on the first page, repeated on the last page of the
manual, says you MUST limit power to less than 50 watts when tuning is
initiated. When not tuned, voltages inside can be extremely high, and
could cause damage to the transceiver. I suspect damage from arcing could
occur inside the tuner as well.

Therefore, even if it has auto-sensing capability, it is not good practice
to routinely rely on that alone unless there is some way to limit power.

Nowhere in the manual could I find a hookup with no control cable
connected. Operating it that way would be at the user's risk.

73, Fred, K4DII