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Old 17th Feb 2021, 10:00 am   #27
Steve G4WCS
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Join Date: Sep 2004
Location: Preston, Lancashire, UK.
Posts: 632
Default Re: PIN diode band switching yaesu ft-767

In terms of the diodes and at risk of going off topic, in the post war period the japanese were catching up with the american semiconductor industry and would have been fiercely competitive, hence the sourcing of hitachi diodes as opposed to the motorola 1n series. However looking at the packaging, the hitachi diodes are in the older oa90 style glass packaging, and Im wondering whether a factor in their long term reliability would be the glass to wire seals failing. Just a thought, so even new old stock ISS83’s may be hit and miss unless tested before fitting of course. I do have a strip of 1N4148’s that I will use. Im also thinking of changing out the blue rubcon electrolytics whilst the board is out
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