Vintage Heathkit Audio Scope AD-1013 Quadraphonic Oscilloscope and Oscillator (1970's)

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via this Reverb listing

Pic of the inside below.

"Heathkit AD-1013 Quadraphonic Oscilloscope | Rare 1970s Vintage | Fully Functional & Beautiful

Up for sale is a rare and stunning Heathkit AD-1013 quadraphonic oscilloscope from the 1970s. This piece is fully functional and in remarkably clean condition, especially considering it’s over 50 years old.

The AD-1013 is a unique vintage unit designed for visualizing sound in both stereo and 4-channel quadraphonic modes—perfect for adding immersive, retro visuals to your synth setup, studio, or hi-fi system. It also features a built-in sine wave oscillator (20Hz to 20kHz), making it useful for testing or generating signals right out of the box.

Functionally:

• All features tested and working flawlessly

• Bright, sharp CRT trace

• Stereo + quadraphonic display modes

• Built-in sine wave generator (20Hz–20kHz)

Cosmetically:

• Front panel is clean and vibrant with no major wear

• Chrome accents are shiny with only minimal spotting

• Original knobs are in fantastic condition

• Wood cover has a few light marks but is smooth and attractive

• Reticule and brand sticker are bright and intact

• Black side panels complete the sleek vintage look

This is an incredible and rare unit that delivers both function and serious retro vibe. Whether you’re after vintage test gear, synth visuals, or a killer display piece for your studio, the AD-1013 is the real deal."

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Heathkit Sine-Square Audio Generator IG-5218

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

" Vintage Heathkit Analog Sine-Square Audio Function Generator.
Dual banana jacks provide separate outputs for each waveform.
Works great, but I have not checked the accuracy of the tuning - It sounds pretty good to my ear.... perfect for for "droning oscillator" stuff, but if you want to use this as an actual piece of test equipment, it may need a recalibration. The PDF manual is available online.

Salvaged from a university clearout. Cosmetically, very clean, but has the schools name hand engraved in the top right of the front panel, and an ID # in the bottom right corner.

120v"

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Ernesto Romeo – Capítulo 1: Improvisación | Sesiones Cluster

Published on Jan 7, 2019 Cluster

MÚSICO INVITADO

- Ernesto Romeo
https://www.facebook.com/klaussmusic/

- Moog Modular System
- E-Mu Modular System
- Yamaha CS80
- Korg PS3300
- MiniMoog D
- EMS VCS3
- Mellotron M400
- ARP 600
- Antonus 2600
- EMS Synthi AKS
- Korg PS3100
- ARP-Solina String Synthesizer
- ARP Sequencer
- Heathkit Signal Generator

PEDALES http://www.efectoscluster.com.ar
- Cluster Starfox-88 - fuzz con octavador
- Cluster Tsunami-9 - overdrive
- Cluster The Dragon-71 - fuzz
- Cluster Ithaca-26 - distorsión hi-gain
- Cluster Cosmos Vibe-13 - chorus, trémolo y vibrato
- Cluster Spirit-92 - chorus
- Cluster Spiral-48 - phaser
- Cluster Pulstar-43 - trémolo
- Cluster Mask-5 - compresor
- Cluster Heaven and Hell - fuzz
- Cluster Voices-2 - auto-wah / envelope filter

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World's easiest oscillator! Introducing the CD40106

Published on Oct 1, 2019 Synth Diy Guy

"Dusting off the old Heathkit to play around with some oscillators based on the CD 40106 Hex Inverter IC. Take an inverter, add a resistor and a capacitor and you have an oscillator :)"

The Adventures of Captain Sausage

The Adventures of Captain Sausage from Atomic Shadow on Vimeo.

http://www.atomicshadow.com/

A short improvisation featuring processed audio from a really bad Sci-Fi movie, HP and BK sine wave generators, ring modulators, tape echo, various effects, and a dash of reverb.

Vintage RF Signal Generator And Composer Synthesizer

via this auction

Heathkit RF Signal Generator
SWTPC Psych-Tone

Update: the Psych-Tone was via Popular Electronics - click through for the schematics. via Benjamin.

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HEATH generator circuit bent optical synth

via this auction

"eight controls and 2 switches 1 light sensor
1/4" output jack 1/4" input jack
AC adapter included"

Precise Model 635 Vintage Pulse Generator & Heathkit Model SG-8 vintage Signal Generator

via this auction and this auction

On the Precise Model 635:
"A.F. Sine, Square, and Pulse. SN# 2656. Vintage unit powers up but is otherwise untested; sold as-is but everything appears functional and this unit has been thoroughly cleaned."

Not synthss, but rather a cool piece of test equipment. You can see the seller's other items for more. Would make for interesting DIY cases. Thomas Dolby has been known to use similar devices [see this post].

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