[VHFcontesting] [VHF] Kenwood TS2000 ACC2 power out

Bob Fischer bobw2sj at gmail.com
Thu Feb 11 17:35:26 EST 2021

Hi Brian,

Thanks for the tip! I got mine very early on so it was from an early
production for sure. I will try the mic input and see if that clears it up.

73, Bob

On Thu, Feb 11, 2021 at 4:58 PM Brian Dickman <brian.dickman at gmail.com>

> The rampup issue only affected very early units (definitely years 2000 and
> 2001, although I don't know exactly when the fix cutoff happened). It's in
> the fixed DSP logic, so the only remedy is a manufacturer's swap of the DSP
> or board if you can convince Kenwood to do the work in the first place.
> A local operator who has a few of the faulty units reported that it also
> only affects the rear ACC2 connector, not the front mic input, and was easy
> to observe: "when you key up, the ALC and power out are both ZERO and then
> over 5 seconds the power ramps up ALC action finally kicks in". He also saw
> this doesn't cause much of a problem for "long over" modes like JT65/9, but
> completely prevents function on the short over modes such as FT8/4.
> I span the gap, using a 2008-era TS2000, which may have the flaw, but
> probably not. However I drive it through the mic port for digital modes and
> have no issues with FT8.
> John, it should be easy to observe but seems most likely that it was
> resolved by 2012.
> Bob, you could try using the mic input?
> --
> Brian NR7Y
> On Thu, Feb 11, 2021 at 11:35 AM Bob Fischer <bobw2sj at gmail.com> wrote:
>> Hi John,
>> I also have this problem with My-TS-2000X and will be watching here for
>> any
>> solutions. It's one of the older units and has never had any firmware
>> updates. I talked to SignaLink about it, and their thoughts were to check
>> the audio set-up in the computer for proper settings. I also have used the
>> SignaLink with an IC-746 Pro and it did the same thing. If I hook it up to
>> my Yaesu FT-450 it works fine. This all certainly adds to the confusion if
>> it's the radio/radios, or just a setting as Signalink suggested.
>> All that being said, I have made many FT8 & MSK144 contacts with the power
>> ramping up in the first couple seconds of transmit, no matter if the
>> signal
>> strengths are strong or weak between the stations I have worked.
>> GL es 73!
>> Bob W2SJ
>> On Thu, Feb 11, 2021 at 1:05 PM John Geiger via VHF <
>> vhf at w6yx.stanford.edu>
>> wrote:
>> > I wonder if anyone has come across this issue when using the Kenwood
>> TS2000
>> > on 6m FT8 or VHF meteor scatter.
>> >
>> > I recently purchased a used Kenwood TS2000, made in January 2012.  I am
>> > looking at getting it on FT8 and other digital modes, but have found a
>> few
>> > old postings on the internet stating that when using the ACC2 jack for
>> > audio in on the digital modes, it takes 3 to 4 seconds to reach full
>> power
>> > on transmit.  I have had a TS2000 in the past and used it with a
>> Signalink
>> > USB interface and can't remember if this was a problem with it or not.
>> >
>> > Is that a common problem for all TS2000s?  Did they fix it at some point
>> > and does anyone know the serial number range or firmware version where
>> this
>> > issue was fixed?
>> >
>> > 73 John AF5CC
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