Hey Håkan, was there a kit like that for the 7313, or did they all come with a fan? Mine has one. Dave Wise ________________________________________ Sent: Friday, March 09, 2018 1:31 PM To: TekScopes@

Thank you, Chris, for your kind gift of a Siemens AF118 transistor for testing. At least in the Q373 position*, your sample AF118 performed like a 2N2207. I saw 60ns delay and 25ns rise vs 50ns/35ns f

That's ingenious, Trey. I too get a kick out of improvising and fabricating parts. But for those who don't, I have a bagful of rubber vibration isolators from McMaster-Carr. They fit, no muss no fuss.

Sorry, but if Dennis' coupler is the photocell-output type, I agree with Albert, a curve tracer will not tell you what you're probably hoping to learn. First, it steps the LED intensity, which means t

Corona Dope. Dave Wise

Good sleuthing. Missing? You mean it never worked since it was new? Fancy that! Dave Wise ________________________________________ Sent: Wednesday, February 14, 2018 4:37 PM To: TekScopes@groups.io Su

If Deane was using the Tek-numbered diodes, that would be sufficient. The VMI M100FF5 is less than 8mm long. I'm worried about flash-over. Dave Wise ________________________________________ Sent: Tues

Those are small packages for such high voltage. Did you pot them? Dave Wise ________________________________________ Sent: Tuesday, February 06, 2018 1:26 PM To: TekScopes@groups.io Subject: Re: HV su

If D45 turns out to be bad, be aware that I replaced mine with a Russian 3I306L (cheap and easy to find unlike TD253), and it seems to trigger as well as the other timebase, even at high frequency, an

Thank you, Philip, for the memory jog. I've seen that style of tag, many times, but forgot due to years of non-refresh. Dave Wise ________________________________________ Sent: Monday, January 22, 201

I'll take your word for it until I have time to independently confirm. Sorry to the rest of you for reducing the signal to noise ratio. I was trying to help, but sometimes that goes wrong. Dave Wise _

The sticker is likely a property ID tag having nothing to do with S/N. Serial numbers were stamped in metal, on the front panel itself for early products, later on a slug that was press-fitted into th

I thought that polypropylene is the accepted substitute. It has lower D than the mica reference cap in my GR 1656 bridge. Dave Wise ________________________________________ Sent: Friday, January 19, 2

Interesting information, Jim, but Chuck is referring to the metallization pattern on the semiconductor wafer itself. He's expecting that when I cut the top off the can and look inside, I'll see a micr

Okay, I'll do one next time I'm home. (That's a week or so.) Dave ________________________________________ Sent: Thursday, January 18, 2018 12:40 PM To: TekScopes@groups.io Subject: Re: [TekScopes] Tr

I've seen identifying marks on IC dies, but not on discrete transistors. Do manufacturers really mark discrete transistor dies? Dave Wise ________________________________________ Sent: Thursday, Janua

Thanks for your hard work, Jon. At least you had some lubrication. :) If you can post a link to their logo, please do. I didn't see much at their web site, and a general image search produced too much

As far as I can tell, groups.io does not have a search facility for photos. I consider this unacceptable, but of course Yahoo's instability was also unacceptable, and I'm not criticizing the owners fo

Jon, Thank you for your kind offer. I have created album "Non-Tek: Identify These West German Transistors". I look forward to your comments. Thanks, Dave Wise ________________________________________

What manufacturer? I can't remember who I got my 2N1304's from. They were made in West Germany and have a logo I haven't been able to match. And they beat the JEDEC voltage and current specs by a coun