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Thanks, John Kolb.? I do have a 5103N-D10 (working properly) and a 5113 parts mule, with a total of twelve 5000 series plug-ins in various states of operation.? Also a 7904 (focus problem - to be solved maybe this month) with a total of nine 7000 series plug-ins, including a 7A22 that has a problem on 0.1, 0.2, and 0.5 V/div - almost certainly an attenuator with a bad connection.? The 5000 series plug-ins include two 5A22Ns, neither of which is working (yet).? My other scopes are a 7104 which needs a bit of TLC, and a (gulp) HP 54120B that needs a new power supply.
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And yes, it is probably premature to talk about probes, John Williams, before I invest in a tube scope.? But it's looking like the 536 is the one to get, when the time comes.? Thanks, Jon (Jean-Paul), for pointing out this very intriguing model with the identical horizontal and vertical paths!? And the P600X probe series needs to go on the wishlist as well.? Hey, if that great audio gear at Marantz was designed with the 536, that's plenty to recommend it. Thanks, John Griessen, for pointing out the 10 by 10 cm grid on the 536.? That's a great feature. John Williams, I share your dislike for long probe cords!? I have a pile of P6102As and P6106As with the long cords, and they are constantly getting tangled.? I'll have to scour eBay for ones with the more reasonable lengths like 4 foot or 1 meter.? Space here in Southern California and the wife's patience with my hobby (obsession) being limited, everything I have in my garage lab is on one 5 foot wide bench and a 13 RU + 20 RU rack, so nothing is very far from anything else.? The long cords just get in the way. And Joe, yes, I am familiar with probe compensation.? It's difficult to determine a person's background when he posts to the group.? In my case, I've been a professional EE for over 36 years, thank God only out of work for a few months since graduating with a BSEE in 1988.? But I know next to nothing about vacuum tubes, just that they sound great! Not sure when I'll have time to jump into the deep end of vacuum tube audio and vacuum tube scopes, but now at least I know what tools to look for.? Thank you very much, everyone! Jim On Wednesday, January 1, 2025 at 10:56:49 AM CST, Jean-Paul via groups.io <jonpaul@...> wrote:
Rebonjour Probes, as mentioned the P600x series was used at the time. The later probe's had wider BW but lower compensation C range. A point of history...Stanley Kubrick's 2001: A Space Odyssey had a scene of astronauts David Bowman and Frank Poole, troubleshooting the AE -35 LNA, with a Tektronix P600x probe.? No scopes though Recommend 1980s Tektronix circuit concept books Oscilloscope Probe Circuits and Probe Measurements 536: a unique scope, used throughout the 1960s. So,? at? Marantz, Sid's , tube amp, preamplifier, tuners,? 1,5,7C, 10B,? were designed using 536.? I was assisting Sid, later at Sequerra, I marveled at the simplicity of his? technique. Jon |
