beautiful and rebuilt HEATHKIT IG-72 Audio Generator. $179 free ship inside continental USA
Here is a Heathkit IG-72 audio sine-wave generator, ideal for testing tube audiophile amps and guitar amps. This is a quality model that has an excellent low distortion sine wave for tube amp testing. And beautiful original cosmetics.
Rebuilt electronics, consisting of:
new capacitors (including correct orientation of caps regarding foil side of the caps)
upgraded the 5k-20W resistor to a 50W surface-mounted unit, for cool operation
meter smoothing capacitor
many resistors replaced to bring circuit into excellent overall accuracy
clean sine wave on all frequencies.
3 wire grounded line cord installed to meet modern safety standards
I have attempted to photograph the sine wave below. The sine wave looks better in-person than the photos show because my camera has a tendency to bloom the scope trace. (Photography is not my specialty!)
beautiful Heathkit FM Deviation Meter model IM-4180, with nice original manual. $179, includes free shipping inside USA (lower 48-states only).
See photos, this is a real beauty, I doubt that it ever saw much — if any — usage. This came directly from an estate of Heathkit collector. It seems that he bought stuff and most of his gear looked that it was seldom, if ever, used. My opinion.
Does NOT include the DC power supply power pack, but any modern power pack of correct DC voltage and current will suffice, or it says that you can run it on batteries.
I have NOT tested the unit nor done ANYTHING to it. Not even any cleaning! Exactly as found, beautiful as you see it.
Since the unit is approx 40 years old, repairs may be required.
Here is a gorgeous PHILCO model 20 DELUXE tube cathedral radio.
This radio is from my own personal collection. I have owned it for close to 30 years.
Price is $225 + shipping (or pickup). Working condition. Awesome cosmetics in my opinion, a real beauty. (Output tubes and rectifier tube will be different from the ones you see in the photo.)
Safer double-boxing of this radio will end up making the shipping cost somewhat expensive (due to the weight of the radio and the resulting large size of the outer shipping box.) If you are a penny-pincher regarding shipping costs, then this item is not up your alley.
Hoping you can answer a question for me. I have an Amplitrex and a TV-7D/U tube tester. The Amplitrex tests a 12ax7 as new at 1600GM. According to your TV7 GM calculator, I believe that should translate to 64 on the TV meter. However, when I test the same 12ax7 on my TV-7 the meter only hits 42. Does it sound like my TV7 needs some calibrating or am I missing something? Hope you can help and thanks for the great calculator.
This website discusses repair of electronic items. Electrical voltages are present and represent a danger. Repairs should only be attempted by a qualified technician. We do not provide free personalized troubleshooting.
All content is the opinion of the author and not intended as advice.