RCA's Power Devices BD750C/BD751C (TO-3 outline) - where in use ?

[tiefbassuebertr]

Until now I haven't had an amplifier, where this parts was used in the output stage. Thus I would like to know, in which commercial audio amplifier models this power BjT was used.
Maybe this series was already after first release only a short time in production.
Thank you very much for advices.

 

[davidsrsb]

Are you sure these were RCA, that is a European part number?
The Inchange data sheet says for high voltage and high power amplifiers, which does not automatically mean audio, they might have been used in servo amplifiers.

 

[jaycee]

BD devices would have been Philips

 

[tiefbassuebertr]

Are you sure these were RCA, that is a European part number?
The Inchange data sheet says for high voltage and high power amplifiers, which does not automatically mean audio, they might have been used in servo amplifiers.

Yes, I will try to find the genuine power devices and the associated RCA datasheets next week for posting the images here.

 

[john_ellis]

RCA registered a lot of their transistors in the European system. Presumably to sell more devices in Europe. I've not seen the BD750/1 used, but they were similar to MJ15003/4, i.e. 4MHz-ish epi parts according to the '84 edition of the power handbook.
I guess not many others have seen these either.

 

[davidsrsb]

If these are RCA, they are almost certainly identical dies to a more common US part number.

 

[Bill_P]

Here is the datasheet.

 

[jackinnj]

RCA registered a lot of their transistors in the European system. Presumably to sell more devices in Europe. I've not seen the BD750/1 used, but they were similar to MJ15003/4, i.e. 4MHz-ish epi parts according to the '84 edition of the power handbook.
I guess not many others have seen these either.

ft looks the same as MJ15003/4.