Identify this part?

[Wimberleytech]

I got a bunch of parts from a friend recently.  Before becoming a patent attorney, he was doing RF design back in the 70s.  This is likely high-frequency RF transistor.  Dunno if it is MOS or Bipolar.  Looks like pretty heavy gold flash.  I did some google searching and will continue to do so...maybe somebody knows this part personally and can enlighten me.

Also in the stuff are some vintage 555s in TO-5 packages...pretty cool.  I tested one for grins...still works.

[Gyro]

Before becoming a patent attorney, he was doing RF design back in the 70s.

That wouldn't be Joe Geller would It?

[Wimberleytech]

Nope!  Good guess I suppose.

[Gyro]

It was bit of a long shot, I knew he was a patent attorney and that Geller Labs was a side interest. Sorry I can't help with the ID but you might want to take precautions against Beryllium dust with '70s power RF parts... just in case.

[RFMWdude]

For what it's worth: the logo is that of Fujitsu.

[Benta]

For what it's worth: the logo is that of Fujitsu.

Spot on!

Looks like a RF/microwave power transistor.

[coromonadalix]

should be in this family

https://www.rf-microwave.com/en/transistors-rf-power-fet-gaas-fet/532/

[IconicPCB]

WHAT GYRO SAID....

Cant say it loud enough.

[RES]

https://nl.aliexpress.com/store/product/5BBELLA-5D-Japan-FLL9208-original-Fujitsu-RF-microwave-high-frequency-power-transistor-252d-252d2PCS-2FLOT/119293_32693997322.html



 

[Wimberleytech]

https://nl.aliexpress.com/store/product/5BBELLA-5D-Japan-FLL9208-original-Fujitsu-RF-microwave-high-frequency-power-transistor-252d-252d2PCS-2FLOT/119293_32693997322.html



 

Thanks.  Wow $60 per.  I wonder if the value is due to rarity, or were these always expensive.  I have about 20.

[coromonadalix]

We use at our company rf mosfets at 45$ usd each  and another rf transistor at 50$ usd  loll

[Wimberleytech]

We use at our company rf mosfets at 45$ usd each  and another rf transistor at 50$ usd  loll

Perhaps I should put these on ebay.  I don't do any significant RF stuff...certainly not where these would be used.

Thanks for the input!

[Benta]

60$ would not be unusual for microwave power transistors.

Don't mess around with them. First off, they are sensitive, and as Gyro said might contain beryllium or other nasties.