Hi Paul,
I have a TKR-720 (VHF), and was successful in reprogramming
it for the ham frequencies.
However, it is not for the 'faint of heart'.
1. There are two EEPROM devices which must be reprogrammed.
One for the frequencies, and one for PL.
2. The EEPROM device for the frequencies is soldered to the
front panel board. You must unsolder & put a socket in
place of it (so you can plug in the re-programmed device).
3. You must make your own EEPROM programmer. It's not all
that difficult - just a socket & a couple of easy to get
parts.
4. I use a program called PonyProg, which does the actual
reading/writing. Another program called XVI32 is used
to change the binary file that you downloaded from the
original EEPROM. (you shouldn't destroy the original
part).
5. I had to re-tune the VCOs - easy procedure, and the
schematics/manual for the 720/820 seem to be available
in .pdf form around.
Anyhow, I went through this procedure about 2 months ago... you
can search through the archives for TKR-720, and probably
find the thread which included the programmer schematics &
'how to' guide.
Having said that, it'd be a lot easier to get something
from Skipp!!
Thanks,
Tim W5FN
--- In Repeater-Builder@yahoogroups.com, "skipp025" <skipp...@...> wrote:
>
> Hi Paul,
>
> As others have also replied with similar information... you
> need a different type of programming interface for the TKR-820
> and TKR-720 Repeaters, which is called a KPT-50 unit. The KPT-20
> might also work for the cause but it's really a very early
> interface not normally seen on the use radio market.
>
> Regarding the KPT-50 unit:
> Depending on where and how you can find one... they are
> relatively expensive (at, near or above the $200 amount). You
> can search out a process others have mentioned to remove the
> signaling and frequency EEproms and program them yourself
> if you have the proper hardware (and software).
>
> I'm a Kenwood Dealer and would program your repeater for free
> if you are/were able to get it to our shop here in Northern
> California (where the men are men and the sheep are nervous).
> I have new and used KPT-50 programmers in stock, but again they
> are not super cheap (please contact me off the list direct if
> you want more information about buying a KPT-50).
>
> The TKR-820 might go into the Amateur Band with just a front
> end realignment, but there are also cases where the VCO's
> (there are two) need re-ranging (adjustment). VCO adjustments
> would normally require the Kenwood Service Manual, which should
> be on/in the Repeater Builder Web Page Archives.
>
> The KPT-50 Programmer operates "stand alone" or you can control
> it with the DOS KPG-21d software, which makes life much, much
> easier for the programmer person.
>
> A jumper on the Signaling Board enables the Repeater/Base to
> use 8 independent combinations of CTCSS or DCS (the industry
> names for "PL" and "DPL".
>
> You're always welcome to Email me direct if you need specific
> help with your Kenwood (or any brand we service) Questions.
> Of course I'll happily respond to your Group Posts here if
> Howard can stand it... :-)
>
> cheers,
> skipp
> skipp025 at yahoo.com
> www.radiowrench.com
>
>
> > Paul Dumdie <w9dwp@> wrote:
> >
> > I have the opertunity to get a Kenwood TKR-820 repeater. I have the
> > programing cable that works on a TKR-850 and all of the TK mobiles.
> > Will this cable work with a TKR-820? What software works to put the
> > repeater in the ham band? Can the repeater do multi PL or DPL?
> >
> > Thanks!
> >
> > Paul R. Dumdie Jr. "73"
> > W9DWP/R IRLP-NODE-4455
> > 443.025/2A 145.270/1B/1Z/NAC-293
> > ARC-Radio-8 KCARES KCAPS
> > HERD546 EX WB9QWZ
> > WQGG738-462.725 AAR5CU/T
> > www.riflesandradios.com
> > www.theherd.com
> >
>
