Definitely not factory..
unknown part under dash
Thread Starter
Instructor
Joined: Oct 2009
Posts: 178
Likes: 7
From: issum Germany
unknown part under dash
Hello,
I found an unknown part under the dash from my ´69 coupe in the near of the mono AMP from the original radio. Can someone tell me what this part is for ? I try to post pictures.
Thanks Uli
I found an unknown part under the dash from my ´69 coupe in the near of the mono AMP from the original radio. Can someone tell me what this part is for ? I try to post pictures.
Thanks Uli
Race Director
Joined: Dec 2005
Posts: 13,515
Likes: 11
From: Fisher, IL
I have no idea but wanted to take a guess before someone much more knowledgeable then me tells you.
It almost looks like the wires my stock alarm has.
yellow and dark green go to the brake lights....
red = power
white is usually courtesy lights?
and black grounds
except I just ripped out my interior on my 69 and found the alarm flasher in the rear storage compartment but definitely didn't have one of those like you did....
It almost looks like the wires my stock alarm has.
yellow and dark green go to the brake lights....
red = power
white is usually courtesy lights?
and black grounds
except I just ripped out my interior on my 69 and found the alarm flasher in the rear storage compartment but definitely didn't have one of those like you did....
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
Thread Starter
Instructor
Joined: Oct 2009
Posts: 178
Likes: 7
From: issum Germany
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
These were common before stereo FM radios were available. Owners put a second set of speakers in the back of the car and the reverb unit sent a 'delayed' signal to those rear speakers. Gave sort of a 'big hall' sound.
Le Mans Master
Joined: Oct 2000
Posts: 8,897
Likes: 1,353
From: Santa Ana CA
There are "transducers" at each end of the springs. One is a "sender" and the other a "receiver." In this case, the signal is taken from the main radio speaker, amplified by the transistors you see, and sent to the "sender" transducer.
The signal, now converted to mechanical energy, is sent out on the spring where it is picked up by the "receiver" transducer.
The receiver turns this mechanical energy back into a signal that is sent out to a second amplifier and an additional speaker usually mounted in the rear. Other units (e.g., guitar amps) can mix this delayed signal back into the main signal and feed it to the regular amp to obtain reverb.
When the signal passes through the springs, a portion reaches the end and is reflected back toward the transmitter side, then back to the receiver side, ad infinitum, creating further delays that goes on until there is no signal left in the springs. This creates reverberation.
The most common point of failure on reverb spring units is the transducers.
A modern reverb spring can:
The signal, now converted to mechanical energy, is sent out on the spring where it is picked up by the "receiver" transducer.
The receiver turns this mechanical energy back into a signal that is sent out to a second amplifier and an additional speaker usually mounted in the rear. Other units (e.g., guitar amps) can mix this delayed signal back into the main signal and feed it to the regular amp to obtain reverb.
When the signal passes through the springs, a portion reaches the end and is reflected back toward the transmitter side, then back to the receiver side, ad infinitum, creating further delays that goes on until there is no signal left in the springs. This creates reverberation.
The most common point of failure on reverb spring units is the transducers.
A modern reverb spring can:
Last edited by toddalin; Dec 13, 2010 at 03:40 PM.
Thread Starter
Instructor
Joined: Oct 2009
Posts: 178
Likes: 7
From: issum Germany
I try to connect the part at one time and find out the sound.
I´ll post the result.
Thanks Uli
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
Safety Car
Joined: Sep 2005
Posts: 4,056
Likes: 99
From: Southeast, Tennessee
St. Jude Donor '09 thru '26
the "springs" in the second picture kind of give it away as that was the structure of the old reverbs from the early 70's. for those that don't know what that was, it created a kind of "echo" effect on regular, pre-stereo AM radios to simulate a deeper sound from the original, "tinny" old radios
