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Brad Boegler
73 followers -
A computer scientist, hardware hacker, and embedded developer.
A computer scientist, hardware hacker, and embedded developer.

73 followers
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Anritsu MF76A Repair - Part I
I recently acquired a nice Anritsu MF76A 18GHz frequency counter in a non-working state off of eBay. While older, this is still a very usable counter that goes for quite a bit of money when working. This one sold for cheap so I figured why not, I'm sure I'l...

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Tektronix 2465B Capacitor Replacement and Repair
Recently and randomly I was notified from a friend about a local company liquidation auction for a local Unisys facility that was shutting down. Hoping to score some cool old vintage computer hardware I scoured the item listings to no avail. Nothing was rea...

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Counterfeit 2N3055 Transistors from eBay
I recently needed some 2N3055 TO-3 transistors for a project, but could not locate any around my basement, so I went ahead and carefully purchased some from eBay. I'll explain what I mean by carefully, a little back story on this before I continue. Counterf...

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HP 54503A NVRAM Replacement - DS1235YW to DS1230Y
A few weeks ago I turned on my HP 54503A to find it behaving strangely. While probing a circuit under test, I could not get any waveforms at all. Was very unusual, so ran a quick self test and was greeted with the following: HP 54503A Selftest Failure - Pro...

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10GHz Station Upgrades
With the 2015 September 10GHz and up contest approaching fast, I am in process of making some performance improvements to my 10GHz station. I had already missed the first round of the August 10GHz and up, so I wanted to make sure to complete a few necessary...

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Anritsu MF76A Repair - Part I
I recently acquired a nice Anritsu MF76A 18GHz frequency counter in a non-working state off of eBay. While older, this is still a very usable counter that goes for quite a bit of money when working. This one sold for cheap so I figured why not, I'm sure I'l...

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Decreasing Phase Noise with Low Noise Regulators
I have posted several times in the past on the PLL frequency synthesizer I designed and built based on the Analog Devices ADF4107. The overall design is a platform for a fractional PLL frequency synthesizer for any frequency range up to about 5GHz.  A singl...

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Tektronix 2246 Repair Part II
In the process of debugging the strange intermittent display issue on my Tektronix 2246 after re-capping the power supply , things are not looking so good. Things have actually gone from bad to worse. First of all, the short (or open connection) somewhere i...

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Tektronix 2246 Repair
Last year I had talked about how I accidentally destroyed my Tektronix 2246 oscilloscope by removing the cover. There was a small dent in the metal bottom panel that while removing it had snagged a heatsink on a Motorola 151-0846-00 labeled TO-39 transistor...

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Large Display for GPS Disciplined Time Server
Since building my own local GPS disciplined local time server I have wanted a large display of some sort to display my super accurate clock. The primary purpose of doing this was really just because it would be rally really cool looking. I also have a perso...
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