Hello and Happy New Year,
I've always wanted to get a current probe and amp like those just because of the magic Mark is talking about. But, specially compared to almost any other TM50X plugin, their prices are difficult to justify. Why is it that they are so expensive?? ( how much did they cost new ???? ) I've never bought magic before :-)... Regards & 73's Roberto EB4EQA __________________________________ Date: Mon, 4 Jan 2010 02:39:27 +0000 From: Mark Sims <[email protected]> Subject: [time-nuts] Tektronix TM500 Series Help To: <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset="iso-8859-1" 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... _________________________________________________________________ _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
