National Company NC-88 User Manual

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PHOTOFACT* Folder
TRADE NAME
SELECTOR
SWITCH
National Model NC-88
TONE
SWITCH
NATIONAL
MODEL NC-88
VOLUME
CONTROL
ON-OFF SWITCH
MANUFACTURER
National Co. , Inc., 61 Sherman St., Malden 48, Mass.
TYPE SET
AC Operated 4-Band Superheterodyne Communications Receiver
TUBES (Nine)
Types 6BA6 RF Amp., 6C4 Osc. , 6BB6 Mixer, (2) 6BD6 IF Amp., 6AL5 Det. -AVC-
Noise Limiter, 12AX7 CW bsc.-AF Amp ., 6AQ5 .Audio Output, 5Y3GT Rectifier
POWER SUPPLY
TUNING RANGE
105 / 130 Volts AC-50 / 60 Cycles
Band "A" -540-l600KC
Band "B" -1. 6-4. 7MC
RATING .56 Amp . @ 117 Volts Ac
Band "C"-4.7-l4 . 0MC
Band " D"-14.0-40MC
HOWARD W. SAMS & CO., INC.
Indianapolis 5, Indiana
"The listing of any available replacement part herein does not constitute in any
case 0 recommendation, warranty or guaranty by Howard W. Sams & Co., Inc.,
as to the quality and suitability of such replacement part . The numbers of these
ports hove
been compiled from information furnished to Howard W. Sams & Co.,
Inc., by the manufocturers of the particular type of replacement port listed."
"Reproduction or use, without express permission, of editorial or pictorial
can·
tent, in any manner , is prohibited. No patent liability is assumed with respect to
the use of the information contained here in. Copyright 1954 by Howard W.
Sams & Co., Inc ., Indianapolis 5, Indiana, U. S. of America. Copyr ight under In ·
ternational Copyright Union. All rights reserved under Inter·American Copyright
Union (1910> by Howard W. Sams & Co., In c." Printed in U. S. of America
DATE
3-54
SET 233
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FOLDER 7

National Company NC-88 Specifications

General

Brand	National Company
Model	NC-88
Category	Receiver
Language	English

Summary

National NC-88 Radio Overview and Controls

Control Panel Layout and Functions

Details the front panel controls including sensitivity, band selection, tuning, and volume.

Key Technical Specifications

Summarizes power supply, tuning ranges, and tube types for the NC-88 receiver.

Chassis Bottom View: Capacitor Identification

Capacitor Locations and Labels

Identifies capacitor components by label and location on the chassis bottom.

Radio Circuitry and Performance Data

Schematic Diagram of the Receiver

Presents the complete electrical schematic diagram of the National NC-88 radio.

Tube Resistance Measurement Data

Provides measured resistance values for each tube pin as per service data.

Chassis Bottom View: Resistor Identification

Resistor Locations and Labels

Identifies resistor components by label and location on the chassis bottom.

Alignment Instructions for NC-88

IF Alignment Procedure

Step-by-step guide for performing Intermediate Frequency (IF) alignment.

RF Alignment Procedure

Step-by-step guide for performing Radio Frequency (RF) alignment.

Parts List and Chassis Top View

Tube and Capacitor Parts Data

Lists all tubes and capacitors with national and replacement part numbers.

Chassis Top View Component Map

Diagram showing the layout and identification of components on the top of the chassis.

Parts List and Mechanical Adjustments

Resistor, Coil, and Transformer Parts Data

Lists resistors, coils, and transformers with national and replacement part numbers.

Miscellaneous Components and Drive Cord Stringing

Details miscellaneous parts and instructions for drive cord stringing.