[time-nuts] Tektronix TM500 Series Help

[Mark Sims]

Frankly,  screw the idea of ordering $30 transistors or paying big shipping charges from Canada.  Just go to Ebay,  find a cheap TM50X power module,  bingo! you're in business!  Either use the module as-is or salvage the transistors from it and repair the TM501.

TM501 modules are rather hard to find and tend to be expensive.    There are several TM506's for $25 Buy-it-Now (plus $33 shipping).   A little patience and shopping should net a TM502,503, or 504 for under $30 shipped...

I would still go the way of a TO-220 with the leads swapped with wires.  A little sleeving and they would be just as reliable as the "proper" transistor,  no matter what physical abuse they are subjected to.

My main current probe setup is a TM504+SC503 analog storage scope+2 AM503B amps+A6302 probes (also have A6303's).  The A6302 current probe actually runs on pure magic...  there's just no other explanation why it can do what it does.   Measure DC-50Mhz at milliamps to 20+ amps without making electrical contact...  yeah,  right.  Next,  you'll try to blame it on some silly hall effect...  but we know magic when we see it...

 		 	   		  
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