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
>
>
>