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Old 18th Oct 2021, 4:11 pm   #15
JonSnell
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Join Date: Oct 2019
Location: Weymouth, Dorset, UK.
Posts: 473
Default Re: 2N 3055-2 ( yes -2 )

From memory, back in 1971 I used a lot of Motorola 2N3055s and was told by the supplier (Celdis Ltd, of Reading) that the Motorola aluminium cased 2N3055s were filled with silicon grease for added reliability and must say I had very few failures when making amplifiers for the disco world.
I then started using 2N3773s as they could handle more power and a higher Ce voltage; 120 volts as opposed to the 3055 of a mere but very respecable 70 volts.
I am sure I still have a few NOS Motorola versions from the 70s. I used to purchase them in trays of 100 at a time.
If I can find them, I will pm you for your address as I no longer need them.
Failing that I would fit 2N3773s. Similar hfe and frequency range.
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