Archive for May, 2019:

2019-05-24 IR Slave Flash

I had an old RCA TV with an early remote control that used an IR beam with different frequencies for 6 different functions. I also had a VCR with the newer remote that sent the codes digitally over a 38kHz carrier. I built a remote extender so I could use both remotes beyond their short

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2019-05-22 Fiber Installing In Near Future

from FB group Orange Talk May 23 Jack What I’ve seen is the internet service providers have eliminated the lowest speeds and lowest prices of course, and now offer only higher speeds and higher prices. For the city of Orange, there will be at&t fiber cables installed in the near future, so Sputum cable will

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2019-05-21 Upstream Data Concentration

from FB group Bell Telephone… May 22 Keith Hlavacs I was connecting up equipment with cat5e and cat6 cabling capable of 1000 Meg’s, and there were 48 ports on the switches on campus. The GBIC feeds on, say, 4 switches were daisychained, so a total of 192 ports per fiber optic feeder. So… I see

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2019-05-19 No Go Showboat

from FB group regenerative receiver initiative May 22 Henrik Stenstrom I would like to build something hollow state with all sorts of gizmos like in this photo, but all of it would be a no-go showboat, just for looks. I would put Amber or orange LEDs under the tubes to make them look like they’re

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2019-05-17 March of technology Kills Skills

from FB group Bell Telephone of.. May 18 Bob Rosa Said “The march of technology inherently takes the skill out of every trade.” The existing skills may be taken out, but it adds new skills. Yes, that trade as a wire splicer may no longer be needed, instead there will be a much greater demand

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2019-05-09 A 3V to 9VDC Boost Converter V. 1.1

I built this in 2007. No load it puts out 9.5VDC and at 22 mA it puts out 8.5VDC. It works okay for powering a radio on the FM band, but it has too much RF Interference on the AM band. The original circuit had only a single output transistor but it couldn’t handle enough

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2019-05-08 Dad’s Barber Shop In Stock Yards In Vernon, CA

Most of this was in FB group Compton 50s 60s My dad’s barber shop was in the old Stock Yards in Vernon. He used to take me there on Saturdays and we’d drive by the murals of Farmer John and his livestock on the walls along Bandini Blvd, IIRC. I used to climb on the

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2019-05-05 Using a 7805 For An Adjustable Regulator

from FB group Building Transistor Radios Willie Barnett When you understand how the 3 terminal regulators work, you can replace the 1N4148 and the almost impossible to get 1N34 with just a pair of resistors. The 7805 or 78L05 regulator always has a fixed voltage of 5V between the O and G pins. So you

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2019-05-02 Regen Using PN2222A Connected Backwards

from FB group Regenerative Rcvr Initiative May 3 Cyril Hodson Superregen receivers are always past the point of regenerative amplification. The AGC for a Regen should keep the regen high but prevent it from oscillating. I was thinking that a CdS photocell could be put in series with the Regen pot, and light from a

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