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The trick to gluing the two halves together, if that is necessary, is avoiding the adhesive binding against the side panel itself. This leaves little surface area to bond between the two halves.

Jeff, PG506 has them on at least some examples. These are used only on plug-ins that include the rear support frame. I will need to look as I think I have a couple of others which have the same side

Which one is Q510? I see 2 Q500s but no Q510. Of course it could just be me. Vince.

I have uploaded the schematic that I have drawn up in Kicad in the files section. Given the new information for Q500 and Q510 I think I will need a different part in CR511. I need to figure out how to

The following files have been uploaded to the Files area of the [email protected] group. * /Tektronix 7854 Test Card PCB files/7854 Test Card Preliminary Schematic.pdf (

Hmmm... Silly me, at a glance I always thought these were just good old fashioned Dzus fasteners, but that shows how little I know about Tek's passion to custom build everything. :-) Keith

On Tue, Jul 20, 2021 at 02:13 PM, <Zentronics42@...> wrote When the design is checked and tested If there Eric, I am certainly interested the boards as well. Thanks, Shaun M.

By latched cover, do you meant just the blank cover?? I have two of them, used for improving airflow and keeping debris and fingers out of empty compartments. -Dave

The latch part numbers should be 105-0932-00 and 214-3364-00. They are described in great detail in the Mechanical Common Design Parts Catalog from November 1988. dan

I am interested. Thanks!

Before we start trying to manufacture a replacement (which I think is a fine idea, especially in this new age of 3D printing) I'm wondering if there is a Tek part number for these? I have the cover,

Dave, I suspect that all three of the tips I have are worn out. I discovered two tips, still in their bags, in a plastic "parts deresser" (plastic drawers for electronic parts, cheap a Radio Shack,

Any chance there is high rez photos of a production analog test board? I have only seen the scan in the manual and I have some questions about layout and locations. Like of the BNC connector. I can

Time for the Cone of Silence before we get the OT warning! Now back to the 7854. I use the board to run my analog backup 7854 parts. It has no Max, I mean smarts, in it. I kludged in 7k readout board

Looks like a suitable new chip would be this https://www.mouser.com/ProductDetail/ON-Semiconductor/SMMBTH10-4LT3G?qs=abmNkq9no6AVRlwMthL29A%3D%3D Vce - 25Vdc Hfe 120-240 Frequency - 800 Mhz

That was the number I was unable to find. I had a feeling these needed to be fast as they are in the trigger circuit and the 7854 is a 400 Mhz frame. Test triggering to 500 Mhz is what I was expecting

So, two years ago she could have taken Max's place?

That’s because she’s 88. Wait until she’s 99!

A web search shows Frequency as 500 MHz as guaranteed minimum. Glenn

The transistor is not a fast one. Rise/fall times are on the order of 10ns to 20ns. Fine for TTL stuff.