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All posts for the month February, 2017

The Panasonic RC-6064 is an AM/FM clock-radio produced in the late 80s and early 90s. This one I received as a Christmas gift in 1989 and has served me well over the past 28 years. A few years ago I tried to replace it with a newer clock-radio that had an iPod dock. The blue lights from the new clock-radio keep me up at night, so it was time to switch back. Two things my childhood clock-radio always needed was aux-in and an external FM antenna. Thanks to the chipset diagrams available online I was able to figure where I could mod the circuit to add these.

Aux-In

The clock-radio uses a Sony CXA1019P IC (IC2 on the board), an AM/FM IC with built in power amp. By tapping into the AF in pin (pin 24) for the power amplifier, I was able to wire a 3.5 mm (1/8th) headphone jack directly in.

Sony CXA1019 IC Diagram

R and L aux-in soldered to the AF In pin and the ground wire soldered to ground on the IC.

External Antenna

The external antenna took a little bit more work to figure out. I had to figure out where in the circuit I could tap an antenna into. Using circuit diagrams I found in a google search I was able to discern that the antenna circuit should come off of the FM RF in pin (pin 12). From there I used a test lead on a weak station to identify the ideal spot on the circuit board to solder the antenna lead to. I ended up following the traces and found an unused hole immediately in front of the radio/alarm on/off switch. I was able to wire the lead to there and ran it out through the back of the case.

The external antenna starts off as the small black wire in front of the left slider switch

The wire is soldered to the antenna circuit which happens to have a trace running along the top of the board in this photo

Final Results

It is all working. The aux-in works great with my various audio players and cell phones, the external FM antenna helps me to better pull in the public radio station I enjoy listening to.

 

 

When I was a child the transition of seasons from summer through fall into winter brought with it a slew of sinus issues and a nasty cough. As I aged, fall and winter became worse for me. After high school I ended up in Florida for my undergraduate studies at a tech university. I and my body were happy to be away from the cold of New England. I had no clue why I sick less often and why my allergies and sinuses bothered me less now that I was in Florida, back then I did not care.

Seven or eight years ago I noticed the Florida falls and winters were getting harder on. By late fall I would suffer sinus infections that I blamed on working at a University or roommates. The reality is that my body was becoming weak, combinations of vitamin D deficiency and B12 anemia were making the fibro worse (or maybe the fibro was progressing making the deficiencies and anemia worse). Part of my diet was a B complex supplement that ended up masking the anemia from my blood tests.

Four years ago I would find myself shaking with a chill in a 71f room. I was still undiagnosed and the doctors were passing me from one specialist to another. I needed a space heater in my office due to the AC keeping the room 75f, which would trigger chills. I remember driving home from work on many occasions, heat on full blast at the highest setting, even when it was 80f outside.

Two and one half years ago I was diagnosed with a vitamin D deficiency and started treatment, I had hoped that would solve my temperature sensitivity. The worst of my pain lessened but I still had regular chills and of course the fatigue attacks.

Less than one year ago I was diagnosed with Vitamin B12 anemia and started treatment. Suddenly I was warmer than I had been in years. I no longer needed to set my AC at 78f-81f, but could keep it at 76f. I stopped getting chills at work and the fatigue attacks lessened. Along with cardio and stretches I felt like I was getting stronger for the first time in years, maybe winter would be easier to handle.

This is my first winter with all my deficiencies treated, I even traveled to New England in December. Winter is still hard on me, especially the cold weather. When the weather drops below 50f the fibro is prone to flaring. I feel stiffness in my joints, my muscles are sluggish and heavy, the chronic pain increases by a factor or two, and my sinuses act up. When I was up in New England I was miserable. The fibro was much worse up there, it made me slow and I felt sickly like when I was younger. While the New England trip reminded me of my health limitations, I was happy I made it there and was able to enjoy some of the trip.

These issues slow me down, but they are not nearly as intense as they were a few years ago. I am happy that I can sit in a 70f room and not suffer a chill. I am happy I don’t have to bundle up to go outside in 60f weather. I look forward to the weather warming back up, it is hard to exercise with muscles sluggish like this, and my hand pain always worsens, making work pain. I am not happy that the fibro flares in the cold, but as long as it only slows me down I will survive.