4 Vintage - SYLVANIA Semi-Conductor - Microwave Diode’s - D- 5020A, 5720, 5920

Genuine Authentic - New

Hey guys, I hope I have these described accurately. This isn’t an area that I am proficient in. Recent estate sale pickup from an AT&T technician that worked his way up high into management. I have boxes & boxes of this stuff. Will list as time permits. If you have read this far, I am very confident you know exactly what these are. I fully back all of my listings with a money back guarantee, no questions asked.

  • 4 of these in vintage small envelopes. 1 in each envelope. Empty box that will hold 4. Not sure of these are collectible or you may wish to put them into the box. 
  • Each diode is in a capsule (like a pill) with what looks like powder to absorb moisture.
  • These are all sealed in the capsule, in-opened. I opened the bags to make sure each was ok.

That all I have on these. There is a few listed for sale but don’t think they know what they have either. 😂




📝 Note: Recent Estate Sale purchase. With that said, If I list an item as new sealed, it is, but I may have opened it for the purpose of taking a photo for you or verifying the product & after since it was previously purchased. I immediately seal it back with a piece of tape. On Packaging, many times the packaging may show shelf wear especially on new/old stock & just normal handling during the estate sale. Packaging is mostly intended to keep the item safe & is usually destined for the trash can once opened anyways. Slightly dinged packaging does not affect the item whatsoever.

📦 Shipping is Below actual cost as always. We never over-charge or make a profit on Shipping. This is a rare issue because I go overboard on my packaging. See my feedback. 🚨 WE ONLY SHIP TO THE CONTINENTAL U.S. & ship prices are set for this. If in Puerto Rico, Alaska or any of the territories, message before buying & I will add the extra ship cost. I can’t sale a $30 item & ship to PR for $30. It’s a common sense thing. USPS prices are ridiculous. Just contact me & we will promptly get it sorted out to your liking.

Thanks for Stopping By 🙂 🇺🇸

  • 💯% GUARANTEED as Advertised or Your 💵 Back
  • 📦 Shipping below Actual Cost as Always