Problem old Acoustic 220 amp - RCA 480015 transistors

[Richard Rasker]

Hi all,

Someone dragged in a broken amp, type Acoustic 220, with blown power
transistors. The big problem is: I can't locate the devices, or even their
datasheets, anywhere. They're RCA-types, all six marked as follows:

RCA 480015 C 7742

This leads me to believe that I'm dealing with a matched transistor set
here (also because all devices in a row are simply parallelled, without
any per-transistor resistors), which rather complicates things.

Can anyone at least point me to an equivalent type? And perhaps give some
information as to the matching required?

Thanks in advance for any leads, regards,

Richard Rasker

 

[Shoreline Electronics]

These cross to ECG 130

2N3055 is a fine replacement.

If you don't have them...Radio Shack does!

Don't be concerned with "matching" issues on this design.

--
=================================
Jeff Stielau
Shoreline Electronics Repair
344 East Main Street
Clinton,CT 06413
(860)399-1861
(860)664-3535 FAX
jstielau@snet.net
=================================
"Richard Rasker" <spamtrap@linetec.nl> wrote in message
newsan.2004.04.12.14.41.59.429041@linetec.nl...

Hi all,

Someone dragged in a broken amp, type Acoustic 220, with blown power
transistors. The big problem is: I can't locate the devices, or even their
datasheets, anywhere. They're RCA-types, all six marked as follows:

RCA 480015 C 7742

This leads me to believe that I'm dealing with a matched transistor set
here (also because all devices in a row are simply parallelled, without
any per-transistor resistors), which rather complicates things.

Can anyone at least point me to an equivalent type? And perhaps give some
information as to the matching required?

Thanks in advance for any leads, regards,

Richard Rasker

 

[Richard Rasker]

On Mon, 12 Apr 2004 18:42:03 +0000, Shoreline Electronics wrote:

These cross to ECG 130

2N3055 is a fine replacement.

If you don't have them...Radio Shack does!

Don't be concerned with "matching" issues on this design.

Hmm, sounds almost too easy Anyway, obtaining 3055's is not a problem,
so I'll give it a go. Thanks for your help!


Richard Rasker

--
Linetec Translation and Technology Services

http://www.linetec.nl/