TM500 system/Repairs

To repair or calibrate TM500 plug-ins, a plug-in extender is often required.

Some options include:

• The original Tektronix 067-0645-02 flexible plug-in extender
• Using a TM503B mainframe that allows easy separation of the power supply/backplane unit from the case (s.b.), or a TM501 in a similar way
• Using the power module part of the TM515 that is easily removed from the case (two thumbscrews)
• Modifying readily available "JAMMA" game console cable extenders (s.b.)
• Custom PCB with card-edge connector

Pictures

• 

  Original Tektronix 067-0645-02 flexible extender

• 

  TM503B power section used for TM500 module maintenance

• 

  TM515 power module removed from case

• 

  JAMMA cable harness modified for use as TM500 extender

• 

  Modified JAMMA cable - contact pad and key slot cuts

• 

  Modified JAMMA cable - key added to connector (piece of 0.5 mm PCB)

Pass Transistors

Thus table is imported from a document compiled by Jerry Scheltgen and Dennis Tillman with updates from Jared Cabot.

Tek Part No	Type	Manufacturer ref	Ic	BVceo	PWR	hFE@Ic	VSat	FtMIN	Case	DigiKey	Farnell	Mouser	RS
151-0140	NPN	2N3055H	15A	60V	115W	20@4A	1.1V	0.3MHz	TO-3
151-0258	PNP	2N4905	15A	60V	87W	20@4A	3.0V	4.0MHz	TO-3
151-0349	NPN	MJE2801	10A	60V	90W	25@3A	1.1V	2.0MHz	TO-127
151-0373	PNP	MJE2901	10A	60V	90W	25@3A	1.1V	2.0MHz	TO-127
151-0413	NPN	2N6258	30A	80V	250W	20@15A	3.0V	0.8MHz	TO-3
151-0436	PNP	MJE2801	10A	85V	90W	25@3A	1.1V	2.0MHz	TO-127
151-0652	NPN	TIP35C	25A	100V	125W	10@15A	4.0V	3.0MHZ	TO-218
151-0651	PNP	TIP36C	25A	100V	125W	10@15A	4.0V	3.0MHZ	TO-218
151-0917	NPN	-	15A	80V	-	-	-	-	-
151-0918	PNP	-	15A	80V	-	-	-	-	-
151-0937	NPN	MJF3055	10A	90V	30W	5@10A	2.5V	2.0MHz	TO-220
151-0938	PNP	MJF2955	10A	90V	30W	5@10A	2.5V	2.0MHz	TO-220

See also

• TM500 Fused Extender