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Hi Paul,
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It may take several days before this gets through to the Yahoo TekScopes Group because my ISP was blacklisted due to one user whose computer was taken over by a spamming virus. I'm told that getting off a blacklist can take some time even after the virus has been removed. I took a look at your web page and just wanted to let you know that I had encountered similar experiences with the 3 7D01 and DF1/DF2 plug-ins I own. Pressing down the ICs seemed to solve most of my problems. In the mid-1970s the only way to trigger on, and capture data at 100MHz was with power hungry ECL logic so the 7D01 runs hot. It also has a lot of DIPs in it since the heat generated by ECL meant there are only a few gates in each DIP package. I wouldn't mind getting a copy of the Arduino program you used to generate test patterns. I could put that to good use. If you can share it please contact me off list (dennis@...). Thanks, Dennis Tillman W7PF -----Original Message-----
From: TekScopes@... [mailto:TekScopes@...] Sent: Sunday, September 14, 2014 2:51 PM To: TekScopes@... Subject: [TekScopes] Introduction Greetings everyone. In a world with 6 billion people, there's bound to be a few thousand of us who share an interest, however seemingly esoteric it is, so I'm glad to have found you all here! After 20+ years, I'm rekindling my teenage hobby of electronics, and collecting & repairing vacuum tube test equipment. I purchased my first scope, a tektronix 545A w/ CA plugin sometime around age 12. I got it because it was a working scope that I could afford, but I was immediately mesmerized by it's engineering and meticulous construction. It was to me, the embodiment of a perfect machine. I was hooked. I've been adding to my collection over the past 2 years, focusing mainly on the 5xx and 7k series. There will always be a special place in my heart for the old tube scopes, and I enjoy shepherding them into their place in history. The 7k stuff is interesting to be because it was the gear I drooled over in catalogs some 25 years ago, and now I can afford it! Living in New York City, the bigger issue is space. Fortunately I've got family just up the river with some space, and can rotate out pieces as the collection grows. Insert joke about nerd in Mom's basement here ;) Collection highlights: 454A - Just fired 'er up after 20 years and I was unsurprised to see a clean accurate trace. 556 - It'll make it back onto the bench for a slow power-up and checkout one of these days. 551 - newer acquisition. Shows a trace but needs some love. 453 - my first 'apartment scope' works well other then B triggering. 7834 - troubleshooting the readout board right now (U3433 is looking like the culprit) 7603 - newer acquisition, perfect host for my; 7D01 - recently rebuilt back info behaving 7D20 - works great, save a bad 4116 RAM (U410). It's on the list.. I'm sure I'll be bugging you all shorty with the 7834 issue after I get a little further on my own. I've also started to chronicle my repair efforts at thanks for reading, and I look forward to repairing and learning along side all of you! cheers, Paul ------------------------------------ Posted by: devpool0@... ------------------------------------ |
