[HBR] Product Detector

[Dan Merz]

Hi, my oversight.  The hang agc circuit is also in the Jan 1963 QST article
on the HBR "Added Versaltility for the HBR 16" which is probably an easier
article to find on the HBR site,  Dan. 

-----Original Message-----
From: hbr-bounces at mailman.qth.net [mailto:hbr-bounces at mailman.qth.net] On
Behalf Of DW Holtman
Sent: Saturday, January 21, 2006 8:36 PM
To: hbr at mailman.qth.net
Subject: [HBR] Product Detector

Hello,

I have a question that I hope that someone can help me with.  I'm looking to
build a Product Detector for a R-390A receiver. The R-390A has a BNC
connector on the back with the If of 455 KHZ coming out. What I want to do
is build a quality detector in a chassis that will mount in a standard 19
inch rack. The mechanics I can handle. What I'm looking for specifically is

1.  Tube gear.
2. Built in AGC circuit, with at least 2 time constants, ie; fast and slow
as well as MGC using manual RF attenuation (pot).
3. At least 2 maybe as much as 4 If stages for better selectivity.
4. Don't know yet is it is better to use cans or crystal/mechanical filters.
5. Don't need a high power audio amp, will feed audio back onto the R-390A
and use the onboard audio amp.

What I'm looking for is a construction project from an old ARRL handbook or
QST article for a quality receiver. I will only use the If strip and the
detector and low power audio amp. If anyone has any suggestions on what year
handbook/'QST might have something promising, please let me know.

Thank you in advance for any information.

73's
DW Holtman
WB7SSN




************************************
Visit the HBR Receiver Web Site with over 100 pictures of receivers and
construction notes...... via http://www.qsl.net/k5bcq/ there is also a
mirror (faster response)at http://k5bcq.edebris.com/
 

Retrieve reflector archived data via
http://mailman.qth.net/mailman/listinfo/hbr