Please see interleaved comments:
On 5/29/2020 8:53 PM, Reginald Beardsley via groups.io wrote:
Please forgive me my ignorance, but for most of my life these things were pure unobtainium for budgetary reasons.
Tell me about that one.
And as I was not an EE and not allowed to touch the ones at work, there was no incentive to torture myself by looking at catalogs of things I could not afford.
I was allowed to touch them.? It's worse....
Getting a 465 was a huge event for me. And I don't mean all the work it took to repair it. I am acutely aware of how fiddly adjusting the vertical amplifiers is. But when you get it right, wow! Though in all honesty, I like my Dumont 1062 better as it does not have a fan. It's only 60 MHz, but otherwise matches the 465 in features.
Much depends on how many channels you need, (most need 4 or less), what the bandwidth needs to be (most need 150 Mhz or less)
Can I use my 7104 plugins in a 7904 mainframe, albeit with reduced BW and sweep speeds? That would greatly ease my concerns about using the 7104 on a regular basis. And make getting a 7904 mainframe pretty much a no-brainer. Just a question of getting a good deal.
In a sense, there are no such things as 7104 plugins.? If you mean the? 7B10, 7B15, 7A19, 7A24, and 7A29.? The overall answer is yes, you can with reduced performance at the high end.? The bandwidth of a plugin and scope frame work a bit like parallel resistors.? With a plugin of infinite bandwidth, the scope frame is the limiting factor.? A 7A29 will give? you closer to the frame's bandwidth than a 7A19, but not more.
Is there a matrix which shows which plugins will work in which mainframes? I'm really only interested in the vertical and horizontal plugins. For the other stuff I have HP gear. I'm not aware of anything Tek made that can compete with an 8566B or 8510C.
Practically any vertical plugin can be used in any frame.? The bandwidth is effectively the lower of the frame or the plugin. Yes, you could use a 7A22 with all the bandwidth limitations in a 7104.? I tend to be careful of the CRT, though, so the 7904 is the workhorse.
Not sure where there is a chart, but there is one.? The scope horizontal sweeps are recommended for the various series.? Tek made 100 Mhz, 200, 400, 500, and 1Ghz frames.? Each one has a recommended horizontal sweep pair.? 7B10 and 7B15 for the 7104/3 for example.
IIRC, and this is only what I remember...
7B92 is for 500 Mhz as is 7B8x
?7B7X is for 200 and perhaps 400, not sure on the 400
7B5x is for 100 Mhz.? 7B50/7B55, 7B53 work in the 100 Mhz frames.
What I have is mostly 7B92, 7B8x, 7B5x, 7B10, and 7B15 depending on the scopes, IIRC.
Harvey
Thanks,
Reg
