The Heathkit IG-72 Audio Generator

In this video, we'll take a look at a piece of vintage Heathkit test equipment, the IG-72 Audio Generator. I'll discuss the history and features of the instrument, and we'll look at the front panel controls and inside circuitry. I'll discuss the restoration of this particular unit, and say something about the circuit design it used. We'll see a demonstration of the generator in operation, and then wrap things up with a summary.

[@beanmeup9902]

Brilliant . . . Bravo!

[@jeffwallach7533]

Jeff, another wonderful Heathkit video..very educational. My Heathkit test equipment collection has grown quite a bit since reviewing all your videos! The ham and electronics community really appreciates all of your efforts! Jeff, N5ITU

[@RestoreOldRadios]

Jeff - another very informative, detailed, and well done video. Thanks for sharing. Don

[@BrokebackBob]

Terrific Jeff, they should put your videos in a time capsule :-) they are that good.

[@RegiPavan]

I am impressed by your knowledge on Heathkit equipment. Congrats

[@joshuaroth4127]

thanks man. i just found one today at the flea market in a pretty good condition and just wondered what the hack this is ^_^ i will have a lot of fun with it^^ cool channel !

[@joshuaroth4127]

forgot to say that i only paid 10 bucks for this one or actually 40 for 4 vintage devices

[@Pwaak]

Great Video! Very fine condition of that generator! Thank's!

[@sebastianhamilton5892]

Excellent video, Jeff. Do you ever sell any of your vintage Heathkit products?

[@jefftranter]

+sebastianhamilton In short, no. If I had something I didn't need I might sell it on eBay.

[@markodelac1528]

Thanks for the video. Do you know what is the exact replacement candalebra bulb for this unit? It just says 3W 115V, but no info on the type?

[@jefftranter]

There are some details here on what lamp can be used as a replacement: www.antiqueradios.com/forums/viewtopic.php?f=8&t=295316

[@markodelac1528]

Thank you very much!

[@ReyciclismoMTB]

Great video, I just bought one 100% stock. I have a somewhat silly question, what’s the finish on the faceplate. I don’t seem able to get a perfect finish. Has a haze look to it, almost smudged. Anyway thanks for the video, my 5 Heathkit product.

[@jefftranter]

It's a matte (not shiny) finish. Possibly yours was cleaned at some point with a solvent that smudged the paint?

[@ReyciclismoMTB]

@@jefftranter Thanks that makes, because is hazy which then you could call matte. Then I’m happy with the look. Thanks for the reply. I just ordered your book.

[@lutbv]

Great video, what do yoou think a fair price would be for one, I found one for 60$

[@jefftranter]

You can look on eBay to see some selling prices there. They range from about $20 - $100, with most around $30. One in excellent condition with manual would sell on the higher end of the range.

[@fullwaverecked]

What are saw tooth and square wave useful for? Thanks!

[@jefftranter]

Square waves are useful for checking the frequency response of amplifiers.They are also useful in digital circuits for clock signals. Sawtooths are less common but are used in circuits for vertical and horizontal deflection on cathode ray tubes (e.g. television and oscilloscopes), switching power supplies, and they are sometimes used in electronic music.

[@billythegent]

hi Jeff. I was curious if I could get your input on an idea I have for this unit. do you have an email I could use to get in touch with you?

[@jefftranter]

+billythegent Yes, [e-mail]