August 2017 Eclipse High Altitude Balloon Flights

The ham radio club that I am a member of supported two high altitude balloon flights from the area of Glendo, Wyoming on August 21st, 2017.

Sun and the mood at totality – no filter

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Hex Beam Installation

After giving up on my 35 year old Cushcraft A4, I ordered a Hex Beam from NA4RR.

Trap Dipole, VHF and UHF antennas installed

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Cushcraft A4 Repair (Fail!)

Shortly after I had repaired my Cushcraft A4 tribander beam the last time, I noticed that it appeared to have a loose connection somewhere.  Especially when the wind was blowing, I would hear something that sounded a little like static crashes, or pops in the receiver.  This was especially noticeable on 20 meters, but was apparent on all bands.

A4 coming down the tower

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TS-430 RF and IF Signal Paths

I’ve had some questions from readers about where to obtain the color annotated schematics for the TS-430 that I used in some of my previous posts.

Violet line indicates the missing SSW signal.

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8640b Power Supply Repair

Early in the repair cycle of the 8640b, when I had just finished the brass gearset installation, I ran into a problem during the first power up after reinstallation of the deviation and range module.  When I powered up the unit, I saw a flash from under the main board, and the unit came up with no led frequency display.  I suspected that I had lost one of the power supplies.  After finding the manual for the generator, I saw that there were 3 power supply boards with led indicators on them to indicate the various voltages were being generated.

5v indicator

5v indicator

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