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Sideband · 19th Jul 2019, 7:24 pm

Yes...the AC128's as I remember them....red spot marks collector. If you are not aware, those BC147 lockfits are now becoming unreliable.....They can be replaced directly by BC547 which is the same transistor in a different package, also has the same lead configuration. Chances are almost any NPN transistor with a similar gain could be used but watch the lead configuration.

19th Jul 2019, 7:24 pm	#38
Sideband Dekatron Join Date: Oct 2003 Location: Croydon, Surrey, UK. Posts: 7,578	Re: Philips N4450 Reel to Reel Tape Player Yes...the AC128's as I remember them....red spot marks collector. If you are not aware, those BC147 lockfits are now becoming unreliable.....They can be replaced directly by BC547 which is the same transistor in a different package, also has the same lead configuration. Chances are almost any NPN transistor with a similar gain could be used but watch the lead configuration. __________________ There are lots of brilliant keyboard players and then there is Rick Wakeman.....