I'm not sure if you were looking for constructive criticism or not. If you
were, here's mine. If not, the delete key is within finger's reach...
> 1 TKR-750 VHF Kenwood Repeater - $1350
> 1 KPG-91D Repeater Programming Kit - $119
> 1 TKR-PS1223 Kenwood Internal Power Supply - $169
> 1 PC24-NN Patch Cable (Repeater TX to Duplexer) - $31.50
> 1 PC24-NB Patch Cable (Repeater RX to Duplexer) - $26.35
> 1 PRD-1556 6 Cavity Pass-Reject Duplexer - $1859
> 1 PC95-400-NN Patch Cable (Duplexer to Polyphaser) - $54
> 1 IS-50NX-CI Polyphaser (Lighting Protection) - $62
> 100 feet of LMR-400 Feed Line $82
> 2 CC4-NM Coax Connector Type N Male - $25
> 1 ANT150D6-9 VHF 4-Bay Folded Dipole Antenna - $995
> 1 Setup, programming, and bench testing before shipping - $105
My comments would be:
1. AVOID the LMR coax!!! 100 feet of 1/2" Heliax with connectors is only
going to cost you maybe $50 more than the prices shown. Feedline is NOT the
place to cut corners.
2. I don't know what the PC??-?? patch cables are, but I'm guessing that
they, too, are LMR400 (judging by the PC95-400-NN nomenclature). If that's
the case, upgrade to either double-shielded silver-braid coax (RG142B,
RG214, RG393, RG400), or are solid-shield cables such as Superflex-type
Heliax. For the prices quoted, you could afford to buy the materials AND
crimp tools to make your own RG400 or RG214 cables with silver-plated
gold-pin telfon-dielectric connectors.
3. Consider budgeting for an isolator for the transmitter and additional
receiver filtering. A pass/reject duplexer like the Telewave TPRD-1556 does
a great job of protecting your receiver from your own transmitter, but does
very little as far as protecting you from anyone else, or anyone else from
you. Without knowing what the RF landscape is like at your site, it's hard
to say what will be necessary. Maybe nothing if it's a very quiet, isolated
site. Maybe a lot if it's a crowded commercial site.
4. I don't see a controller listed? If you intend to use the stock
controller built into the TKR-750, be advised that you will still need a
means of remote control (i.e. a control link above 222 MHz or landline),
which makes an amateur-type controller better suited for the job.
5. Not being familiar with the Kenwood power supply, I don't know whether
or not it has provisions for battery backup, but that's something that would
probably be desirable on an ARES/RACES machine.
I won't comment in detail about the prices other than to say it would be
wise to shop around.
73 and good luck on your project.
--- Jeff
