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Posts Tagged ‘HP’

HP 8620C sweep generator repaired

Thursday, March 15th, 2018

Kerry Wong did a repair of an HP 8620C sweep generator we covered previously: In my previous post, I did a teardown of an HP 8620C sweep generator along with an HP 86245A 5.9 GHz to 12.4 GHz RF plugin. A few of the plguin boards in the 8620C had...

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Posted in repair | No Comments »

Capacitor plague? Inside an HP 8620C sweep oscillator and HP 86245A RF plugin

Wednesday, February 21st, 2018

A teardown of the HP 8620C and HP 86245A by Kerry Wong: I just picked up an HP 8620C sweep oscillator with an HP 86245A 5.9 GHz to 12.4 GHz RF plugin on eBay. This time around though, the unit does not work. While it was advertised as a working...

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Posted in Teardowns | 1 Comment »

DIY HP/Agilent 53131A 010 high stability timebase option

Wednesday, September 11th, 2013

Gerry Sweeney wrote a post on his blog detailing his DIY HP/Agilent 53131A 010 high stability timebase option: I decided to make a clone 010 option board for my counter using a second-hand OCXO bought from e-bay. I designed a PCB to get a professional finish as well as a reliable upgrade...

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HP 5328A universal frequency counter teardown

Thursday, April 26th, 2012

Kenneth scored two HP universal frequency counters and popped them open. One generates the timebase from an uncompensated oscillator in a TO-5 package, while the other uses a large temperature controlled oven oscillator: here is both of my counters measuring the same 1pps  taken from my AdaFruit GPS receiver.  The...

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Posted in Teardowns | 10 Comments »

Interfacing Arduino with an HP LED display from the ’70s

Monday, April 9th, 2012

[embed]http://www.youtube.com/watch?v=izDoIpxYRVc[/embed] John demonstrates how to interface a vintage LED display with the Arduino. The display in question is a HP 5082-745 model, found in calculators, and other products from this manufacturer in the '70s. Using the display is very easy – kudos to the engineers at HP for making a...

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Posted in DIY, LEDs | 8 Comments »

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