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Radio frequency treatments can help you solve a number of problems that you may be up against as a result of aging like sagging skin and pain in joints.
lasertreatmentz.blogspot.com/2013/04/radio-frequency-trea...
Homebrew 175MHz prescaler for frequency counter. This was based on Heathkit IB-102 design, with some modifications. The circuit boards were my only use of a photographic technigue to develop the resist patterns. The boards came out nice but it was too time consuming for a one-off application.
"The Unexceptional" series
Testing out a chrome Carl Zeiss Distagon 50mm f4.0 lens I recently acquired for the Hasselblad. I thought a wider perspective would work well with this series.
This is from the first test roll, results aren't bad. The negatives may be a bit flatter compared to my 80mm Carl Zeiss. Need to do some comparison shots.
Hasselblad + Carl Zeiss Distagon 50mm f4.0 + Arista EDU Ultra 400 @ 320 + HC110 B @ 6.5 min (30 sec agitation)
Photo from Feminist Frequency's Tropes vs Women in Video Games wrap party in San Francisco on Saturday August 5th, 2017.
This is a first generation analog TV antenna. This simple antenna design dates back to the late 1940's. It's amazing it's still in one piece. Today however, it is hopelessly obsolete and there are no signals for it to receive anymore.
Homebrew 50 MHz Frequency Counter built in 1972. At the time, a 50Mhz counter was pretty advanced (at least to me). My own design, but functionally, it was similar to an HP 10MHz counter that used nixie displays. I think there are about 50 DIP chips, mostly 7400 TTL, on 8 PC boards. The largest board is about 4" x 12" with 21 DIPs (3 per decade), hidden in the base of the chassis. Today, this could be built with a few inexpensive chips, with much better performance. But, it still works, and I built it, so I use it... ;-)
Nobody knew what I was talking about or could supply real specs, the most important part, no mention anywhere of the frequency range. Most of us of a more mature age can’t hear notes above 8kHz or approaching 18,000cycles per sec.
Who needs an expensive sound bar or earphones that don’t deliver the high notes, that we can’t hear anyway.
I had just returned from a hearing test and the idea of frequency and what we could buy and hear came to me , but this shop seemed ignorant of Hz and specs… My hearing had not changed much in a few years… good enough for the ABC TV, radio and CDs while driving #AngelaMerc . We play cassette tapes in #Smoky60Series ..