Kenwood TR-7800 - Service Manual

A Note From
Dave Miller (AA4DF) and Jill Bryant
at
http://www.aa4df.com
First, please know that we not only provide free PDFs like this one, we also supply
PDF documents for profit. Please know that there is never an extraneous letter (like
this one) added to PDFs we sell.
This TR-7800/7850 Service document is provided to you through the generosity of
Steve, K7LZJ.
This PDF is made from a photostat copy of an original. The 600 dpi scans made
from the copy are available on CD from our web site, as they are too large to
transmit over FTP. We don’t recommend them for higher quality, though, since
readability doesn’t perceptibly improve with them since the original source was a
copy.
You will soon note that “marketing” and “leeching” vendors will soon be selling this
scan on eBay. “The Leech” in Houston will say nothing about quality, and “The
Marketer” in Minnesota will make up specifications to pretend he scanned it
himself, as he does with so many HP factory downloads. Please support original
PDF producers; “leeches” and “marketers” who obtain and sell the work of others
or sell free internet download material to naïve eBay buyers for high prices are
directly responsible for the scarcity of new material in the scanned manuals trade.
Also, PLEASE don’t upload this to K4XL’s BAMA! BAMA has plagiarized most of
our Tektronix material, and if you investigate you’ll see that they have a great deal
more test equipment manual inventory than useful ham radio inventory (after all,
test equipment docs are “where the money is”) even though they masquerade as a
ham radio site, and that coupled with the presence of the words “if you bought this
from anyone other than BAMA…” locked into the material pretty well tells you
what their intentions are. Wildly waving the “FREE! FREE! FREE!” banner they
are tricking decent people into plagiarizing working vendors, with the ultimate
objective being for BAMA to profit from the labor of others at no cost to themselves.
Otherwise, pass it around all you wish. Thanks for taking the time to read this.
-Dave and Jill
http://www.aa4df.com

Summary

Circuit Description

RX Section

TX Section

Parts List

Packing and Disassembly

Disassembly Procedures

Adjustments

Test Equipment and Preparation

Lists required test equipment and initial setup procedures for adjustments.

RX Unit Adjustments

Covers tuning and alignment procedures for the receiver unit's circuits.

Final Unit Adjustments

Details alignment and calibration steps for the final transmitter unit.

PLL Unit Adjustments

Outlines the tuning and lock voltage adjustments for the PLL unit.

Control Unit Adjustments

Explains touch tone and other operational adjustments for the control unit.

Operational Checks (K type)

Frequency Entry and Mode Selection

Memory Channel and Key Operations

Specifications

K type Specifications

Lists technical specifications for the K type model, including frequency and power.

W, T type Specifications

Details technical specifications for W and T type models, covering performance parameters.

Kenwood TR-7800 Specifications

General

Brand	Kenwood
Model	TR-7800
Category	Transceiver
Language	English