Back to index page
Back to Home
Kenwood TR-8300 Notes
Compiled by Mike Morris WA6ILQ
I had a 8300, a mag mount and a small homebrew power supply parked on top of the refrigerator for a couple of years. The TR-8300 was a darn nice no-frills crystal controlled UHF 1 watt/10 watt radio. You could plug in up to 22 crystals! It had a huge internal speaker, and such niceties as a factory zero-center meter jack on the back.
Two TR-8300 brochures:
This document is the Com-Spec writeup on adding an SS-32 encoder. While it specifies an SS32 any external encoder will work - a TS32, a Vega 188, etc.
Note that the unit as shipped is tuned to transmit from 445.0 MHz to 450 MHz and receive from 442.0 MHz to 447.0 MHz. Southern california and many other areas are upside down from that, and the radio needs to be retuned. You need to tweak both the receiver and the exciter, both are about 5 MHz wide, and the tweaks should be made in the center of the 5 MHz range desired.
From Trio-Kenwood Service bulletin no. 16, dated 02-06-1977:
Adjust the oscillator coil L14 1/2 to 1/4 turn counterclockwise until the LED in the channel indicator window turns on. This indicates that the oscillator is now working. Connect a signal generator to the TR-8300 and adjust L15, L16, TC-6 and TC-7 for maximum "S" meter indication. (These should be very small adjustments.) Adjust TC-5 in the helical resonator for maximum "S" meter indication. This is the only adjustment made to the helical resonator.
Connect a wattmeter and dummy load to the TR-8300. Adjust the oscillator coil L3 for maximum RF output.
The author can be contacted at: his-callsign // at // repeater-builder // dot // com.
Information provided from various sources as listed in the text.
Hand-coded HTML © Copyright date of last edit by Mike Morris WA6ILQ.
This page split from the main index page 16-Nov-2011.
This web page, this web site, the information presented in and on its pages and in these modifications and conversions is © Copyrighted 1995 and (date of last update) by Kevin Custer W3KKC and multiple originating authors. All Rights Reserved, including that of paper and web publication elsewhere.