These amps used a serial number system that was not used by any Ampegs.
Unfortunately, the serial numbers are of little help for dating one of these pre-Ampeg models and EIA date codes on components were used sporadically during the early post WW-II years.
‘After two days, Flo knew me better than my partner.
To date, the free app has ten million users globally, monitoring different stages in the hormonal cycle from menstruation to pregnancy, early motherhood and menopause.
By anonymously logging information such as symptoms, weight and moods, each user receives personalised feedback about their reproductive health.
Keeping track of your period is far from a novel concept. ‘It’s a useful step for understanding PMS, detecting conditions such as endometriosis and charting fertility.
Some scholars have even proposed that the markings on the Ishango bone – an ancient African artefact – may have been an early lunar calendar to track menstruation. I definitely support it as part of a woman’s health programme,’ says consultant gynaecologist Michael Dooley.
This information original was found on The Unofficial Ampeg Page ( which appears to be dead.
I pulled this information from Google's cache of the site.
These codes have been used on components including potentiometers (pots), transformers, capacitors, tubes, and speakers.
The code usually consists of 6 or 7 digits such as 137634 where the first two or three digits is the EIA code for the manufacturer (137 denotes CTS), the fourth digit and sometimes fifth digit denotes the year (in this case it could be 1956, 66, or 76), and the last two digits denote the week of the year.
She adds, ‘When my boobs started to grow, I thought something was wrong with me. I was too ashamed to talk to my grandmother about it, so I just worried.’Encouraging openness around periods is fundamental to Natalia’s global campaign ‘Let’s Talk About It. This month, she is travelling to India, where menstruating women are often considered ‘dirty’ or ‘unclean’, to speak out on period stigma and empower women. Since this month is officially Organic September (soilassociation.org), here’s a natural favourite.