I also painted the chassis with some Semi-gloss black high heat exhaust enamel from Duplicolor since it prevents rust and holds stronger than the rustoleum stuff. I stripped down the whole thing and wire brushed the chassis using my Drill Press with a wire wheel. It does not store any personal data.Started on restoring the VTVM. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. I still mourn the death of Heathkit, like a long lost friend. After that fix the distortion went down to under 0.02%. The only repair I've had to do is replace a resistor in the AG-9A audio generator which had too low a wattage rating causing value shift and 4% harmonic distortion. I'm impressed that all my Heathkit tube equipment from the 50s and 60s still functions very well indeed. If you look at the schematic, there are very few caps in the circuit. Those wax covered paper tubes are hiding the reistor values underneath them.
In the 60s I replaced the 1.5V D cell for the ohms function with a power supply kit sold for that function and the zero and ohms pots with the vernier (planetary ball) pots availble from Heath which made setting zero and ohms far less touchy. The Heathkit has a db scale and no separate scale for the 1.5V range.
It's a close cousin to the RCA who had all the standard tube circuits in their tube manuals. I still have my Heathkit V7-A VTVM which I built in 1957 working.
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