Archive for October, 2018:

2018-10-29 Early Transistor Radios And LW Band

from FB group Vintage Transistor Radios 2018-10-29 One may find that some early transistor radios, along with AM, had Long Wave band before they had SW or FM. We should keep in mind that earlier germanium junction transistors had a maximum frequency that was limited to 2 to 4 MHz. The radios could have a

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2018-10-26 TV Repair Was A Dying Business

From FB group Building Transistor Radios 2018-10-26 I repaired a lot of old tube TVs, and I saw that the repairs were dying when it was cheaper to remove the chassis from the old TV’s beautiful wood cabinet and buy a new cheap TV and put it into the wood cabinet. It even had a

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2018-10-24 The AT&T L.D. Network Crashed 1990

The article about the system crash. As was stated in the article, C is not as structured as some other languages, which may allow the programmer to write code that has unintended consequences. Jay Neale said ‘C is very unforgiving.’ But C allows you to do things with the implication that you know what you’re

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2018-10-18 Admirable Admiral Radio

from FB group Vintage Transistor Radios 2018-10-20 Was it made in the late ’50s? The transistors are early RCA types. These old time radios are about 60 years old and I am amazed and inspired to hear and see that, once the caps have been replaced, they perform as well as the day they were

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2018-10-16 Major Power Outages In Neighborhood

from FB group Orange Talk Oct 16 Melissa McQuary Moser I grew up in a neighborhood that used ‘antiquated equipment’ and we didn’t have these long term outages. I’ve lived in Orange for decades close to Edison’s main station on Tustin and Taft, and our neighborhood had major outages lasting for hours. We remember the

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20185-10-13 Limiting Global Warming To 1.5 Deg. C

I was reading this article about the catastrophe that awaits us in the near future, in the next 20 to 35 years. It states that limiting the global warming will be hard, really hard. But it’s something that has to be done if life as we know it is to be saved. As the article

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2018-10-12 Finding Transistor Substitutes

From FB group Building Transistor Radios 2018-10-12 Michael P. Hamilton After I got a National transistor catalog decades ago, I started to understand the way they were making and packaging transistors. They had lists of discretes, BJTs, FETs, etc. At the beginning of the line was the part number, then the parameters, and then at

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2018-10-08 Air Band Radio Kit HMOOABRA_4.3 Part 5

from FB group Building Transistor Radios comment 2018-10-08 Bob Johansen Receive frequency? I can’t receive a signal, so the receive frequency is not known. This receiver has no tuned circuit in the RF side of the NE612, other than the bandpass filter made up of the coils on the PCB and their capacitors. The bandpass

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2018-10-07 Air Band Radio Kit HMOOABRA_4.3 Part 3

From FB group Building Transistor Radios comment 2018-10-07 Bob Johansen I don’t have a way of calibrating an RF signal level. Back when I worked on Aircraft radios we had General Radio VHF signal generators, attenuators and RF signal strength meters and a Panoramic spectrum analyzer. This would have been a piece of cake to

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2018-10-06 Air Band Radio Kit HMOOABRA_4.3 Part 2

Posted to FB group Building Transistor Radios 2018-10-06 First part is here. I noticed that my photo didn’t get added to the photos tab, So I’m trying again to add it. I got a fresh start this Sat. morning. I used another little air band receiver to listen for the LO from this one. I

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