Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
Click on a see also (sa) or tracing (xx) to view detailed entries about a related subject.
The entries are in alphabetical order by magazine name and then in chronological sequence.
To obtain a copy of any magazine article contact your local public library or the publisher.

An audio Q-multiplier for SWLs and hams.
ELECTRONICS ILLUSTRATED Jul 1969 (v.12#4) pg. 97

Circuit for a Q-multiplier for high IF's. Covers IF's up to 1430 KHz.
POPULAR ELECTRONICS [1] Jul 1968 (v.29#1) pg. 66

Circuit for an audio Q-multiplier to increase the selectivity of a receiver.
POPULAR ELECTRONICS [1] Aug 1968 (v.29#2) pg. 77

Improve receiver sensitivity and selectivity with a Q-multiplier/amplifier. Uses a field-effect transistor stage. Est. cost: $10.
POPULAR ELECTRONICS [1] Dec 1968 (v.29#6) pg. 51

Q-multiplier boosts SW selectivity and gain. Est. cost: $20.
POPULAR ELECTRONICS [1] Apr 1974 (v.5#4) pg. 32

Schematic for a Q-multiplier (audio filter) to improve the selectivity of the CW and SSB in the Realistic DX-300 receiver. Other tips on improving this receiver are mentioned.
POPULAR ELECTRONICS [1] Sep 1980 (v.18#3) pg. 110

Audio Q-multiplier, an audio filter for Morse-code reception.
POPULAR ELECTRONICS [2] May 1989 (v.6#5) pg. 48

Audio Q-multiplier circuit which provides enhanced receiver selectivity and gain centered around a 1.5-kHz audio output frequency. This filter connects between receiver and the headphones or speaker.
POPULAR ELECTRONICS [2] Feb 1999 (v.16#2) pg. 55
Correction POPULAR ELECTRONICS [2] May 1999 (v.16#5) pg. 64

Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law.