• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

New Transistor Tester

EchoWars

Hiding in Honduras
Sponsor
My beloved Sencore Cricket went belly-up a few months ago, so I went shopping for something to replace it. This Peak tester is as foolproof as they come. Automatic lead ID, checks out bipolars, FET's, MOSFET's, diodes, triacs, LED's, and more. Awesome little gadget. Only thing I've found that it fails with are power VFET's, as the low S-D resistance looks like a short to the meter. Other than that, this thing is awesome.

108-139-thickbox.jpg
 
Register to hide this ad
These are great, I've owned mine for about five years, they're easy to use, accurate and the best thing since sliced bread! :yes:
 
Is this capable of testing any component with it still mounted in the PCB? Or is that pretty much not possible regardless of the equipment?
 
EW:

Did you order from the site in your link or did you find a US distributor? This looks way easier than remembering all the transistor testing protocols.

Jack
 
You can grab them off of eBay too.

They also sell a kit that contains this gadget plus an ESR meter and an LCR meter. There's another kit that also contains a thyristor analyzer. The kits come in nice carry cases as well.

Seen 'em, haven't tried 'em. They look like they're put together well, though. Glad to hear a positive word about them.

Cheers,
Beecher.
 
Is this capable of testing any component with it still mounted in the PCB? Or is that pretty much not possible regardless of the equipment?
This will NOT test in-circuit...the old Cricket did, but I must admit it was a seldom used feature. (Yes, some old-skool devices did in-circuit testing.)

I just ordered one of these dudes: http://www.us-instrument.com/commerce/catalog/product.jsp?product_id=2359&czuid=1255026304180

It appears to be a low-cost replacement for old Tek models like the 575 and 577. I'll post my impressions when I've had a chance to play with it.
10x the price, and while cool, the usefulness in repair work is damned low on the scale.

EW:

Did you order from the site in your link or did you find a US distributor? This looks way easier than remembering all the transistor testing protocols.

Jack
I ordered directly from Peak in the UK. Paid for the meter and the nice Case Logic case to store it in. It shipped very quickly...I believe I had it in about 10~12 days. There are some US distributors, but their pricing is whack, so I went right to the source...
 
I'm currently building the Elektor's curve tracer for BJTs and FETs, see attached PDF file. It comes with (free) curve tracer software; with export to MS Excel and other formats; ideal for storing results, and for very close matching.

PCB and most of the parts have been ordered and received (the transformer footprint on the PCB is the only PITA; only one brand fits). I only have to find time to put it together.

By the time it's finished, I estimate that it will have cost me around €200~225, including nice enclosure with test leads.
 

Attachments

10x the price, and while cool, the usefulness in repair work is damned low on the scale.

You might not believe this, but I did in fact use a Tek 575 throughout most of my career in the audio service business. We had portable transistor testers in the shop as well, but as you have observed, they sometimes lie, and this leads to enormous waste of highly skilled labor. I do circuit development work now, so the new curve tracer won't see much duty as a service tool. I'll butt out of this thread now and post later on my findings.
 
Ordered mine yesterday and got confirmation that it was shipped today. EW was right that it is way cheaper ordering direct from Peak. US distributors are 2x price.

Can't wait to get it and start blowing up transistors!!

Thanks for the tip EW and don't be shy about other neat pieces of testing kit. After all, most of us are working off your DIY sticky.

Jack
 
I'll butt out of this thread now and post later on my findings.
You are perfectly welcome in the thread...it's just that I could not see myself desoldering a transistor and humping it over to a curve tracer. In general, a simple diode test catches about 75% of failures, something like the Peak meter ought to bump that to perhaps 85%, and ponying up $800 in an attempt to push that percentage to 90~95% doesn't make a lot of financial sense to me...at least when most of my work is done on 35+ year-old gear, where the old transistors may test just fine 'now' but have intermittent issues or are simply going noisy (both big issues with vintage gear, and something my meters and your CT are essentially useless for). Instead, I've invested a lot of time into having reliable and serviceable new replacements for about any transistor that I might possibly encounter. While that has meant an investment much larger than an $800 curve tracer (which I'd love to have anyway), the bottom line is that the gear has to get repaired and a CT just doesn't get me there, while lots of spare parts do. :)
 
Last edited:
Back
Top Bottom