Archive for October, 2018:

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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2018-10-08 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 4

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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2018-10-05 Air Band Radio Kit HMOOABRA_4.3 Part 1

Will also post to FB. I ordered this air band radio kit from China a few weeks ago and received it a few days ago. Yesterday I spent most of the day assembling it. I’m an experienced kit builder and believe me, it was difficult. The kit came with a single sheet of paper, on

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