Top
Contact Information
Web Site Search
Intercom Repair Request Form
Videos
Navigation
FREE Manuals and Installation Guides
NuTone IK15 & IK25 DoorCom Systems
NuTone Intercom Systems - Service & Repair
NuTone Intercom Problems by Model Number
NuTone Intercom Photo Gallery
Vintage NuTone Intercom Catalogs
Rebuilds & Repairs
NuTone Door Chimes
Donations
M&S Systems (Music & Sound Intercom)

NuTone Intercom Photo Gallery > NuTone Stereo Muisc Intercom Master Station 2500 > Nutone model 2500 output transistors

Nutone model 2500 output transistors

Here you can see some serious output transistors.  The 2500 uses 4 RCA 2N3055 output transistors.  After 40 years these TO3 transistors should be carefully removed, cleaned and have new heat-sink compound with a new mica insulator added before they are reinstalled. 

lucky these transistors are still available and only cost a few dollars each.