Hi.
I can see where there could be something to it. I had some band switching
diodes in a Kenwood R1000 receiver that created a rather high noise floor
until a talented repair tech with an oscilloscope tracked down the
offending noisy diodes and replaced them with quiet ones.
73, de Lou K2LKK
At 09:04 PM 3/17/2008 -0600, you wrote:
>interesting stuff.
>I tend to believe the couple who have actually done the mod and say it works
>as suggested. The others who haven't done it, and haven't experienced who
>say its bogus don't have a clue and are merely blowing hot air...a rather
>hammish thing to do sometimes hi hi.
>73
>Colin, V A6BKX
>----- Original Message -----
>From: "Steve Forst" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Monday, March 17, 2008 7:40 PM
>Subject: Re: ts-2000 filter diode mod
>
>
> > Colin,
> >
> > I don't have a dog in this fight, but for what it's worth, I saw this back
> > and forth on e-ham a few weeks ago:
> >
> > http://www.eham.net/forums/Misc/7142
> >
> > Don't know if kenwood service will do the job, but their shop rate is
> > fairly high. The one in Virginia Beach isn't owned by Kenwood and
>started
> > out as a audio repair center. They still do a/v repair and act as
>Kenwood
> > Service East and now also as Tokyo Hy-powerUSA service. Perhaps their
> > contract with Kenwood would preclude their doing this type of mod.
> >
> > There is Cliff Holland at Avid in Texas and a fellow named Mike in Maine,
> > who are both highly rated on e-ham and may be able to performe this
> > surgery.
> >
> > 73, Steve KW3A
> >
> >
> >
> > ----- Original Message -----
> > From: "Colin McDonald" <[log in to unmask]>
> > To: <[log in to unmask]>
> > Sent: Monday, March 17, 2008 6:42 PM
> > Subject: ts-2000 filter diode mod
> >
> >
> > > Has anyone who has a ts-2000 on the list ever had the filter diode mod
> > > done?
> > > This mod is the one where all the diodes in the DSP filter section of
>the
> > > ts2000 are replaced with high quality, low noise diodes.
> > > The noisy receiver in the ts2k is infamous, and a cause for many folks
>not
> > > to want it or rid themselves of it for a 746/56 series icom with a low
> > > noise
> > > floor.
> > > Apparently, according to the guy on ham.dmz.org, the replacement of the
> > > dsp
> > > filter diodes with better ones made a huge improvement.
> > > He put an image of a before and after screen shot from a scope. With
>no
> > > antenna hooked up, the stock ts2k seems to have about -24DB of internal
> > > noise on all HF bands.
> > > After the mod, and according to the scope image, it has minus 36 db of
> > > noise
> > > which is, obviously, a 12DB drop in the internal noise.
> > > This is, to the human ear, an equivalent of, I think, halfing the noise,
> > > and
> > > halfing it again.
> > > So, a 200 percent drop in noise from stock i suppose.
> > >
> > > If anyone has had it done, where did you get it done? Will the kenwood
> > > service department perform these kinds of mods if you send them the
>parts?
> > > Or, is there anyone specific in north america who will do this
>particular
> > > mod?
> > > I think it would vastly improve the receiver in the rig and allow it to
>be
> > > a
> > > really world class dx radio.
> > > 73
> > > Colin, V A6BKX
> > >
> > >
> > >
> >
> >
> >
> > --
> > No virus found in this incoming message.
> > Checked by AVG.
> > Version: 7.5.519 / Virus Database: 269.21.7/1332 - Release Date: 3/17/2008
>10:48 AM
> >
> >
>
>
>
>
>--
>No virus found in this incoming message.
>Checked by AVG.
>Version: 7.5.519 / Virus Database: 269.21.7/1335 - Release Date: 3/19/2008
>9:54 AM
Louis Kim Kline
A.R.S. K2LKK
Home e-mail: [log in to unmask]
Work e-mail: [log in to unmask]
Work Telephone: (585) 697-5740
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