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Something to do with 7000 series scraps

 

For your amusement:
As with the work of Dr. Frankenstein, some might find this blasphemous and others might just find it to be a good use of scraps. For many years (it always starts that way), I have had an early prototype 7854 carcass without functioning digital cards. It is only the analog section of the 7854 and it is comprised of E, A and B phase prototype parts. A prototype of the 067-0912-00 Analog Test Card knits the analog scope together. It looked like a 7854 with a keyboard and extra intensity control for the STORED WFM, but it operated as a 7804N, as in no readout. With some time on my hands and a lot of scraps in the basement, including a readout board from a 7603, I thought that it was time to make this old carcass a bit more presentable and useful. In the end, it's a bit like Johnny Cash's car from the song "One Piece at a Time," although nothing was smuggled.

I have posted a few photographs of my one-of-a-kind 7804. Perhaps Dr. Frankenstein had a similar thought; I consider it more Fan Art rather than blasphemy.
/g/TekScopes/album?id=271755
 

You might be able to track it down in time by examining the serial number.? How informative that is would be another matter. I would be tempted to see if I could find enough boards to bring it back to life, if that were desirable.? It may be of use to someone (assuming you do not bring it back to life) as a coda in the development cycle.? Not at all sure what would fit with what in that scope.? I've somewhat wanted one, but don't *need* one. Which doesn't keep me from *wanting* one.

May be of some use and interest to others.? I fear that you are many hundreds of dollars of shipping away from me, and I have no replacement boards, anyway.

Harvey

On 1/15/2022 8:10 PM, Clark Foley wrote:
For your amusement:
As with the work of Dr. Frankenstein, some might find this blasphemous and others might just find it to be a good use of scraps. For many years (it always starts that way), I have had an early prototype 7854 carcass without functioning digital cards. It is only the analog section of the 7854 and it is comprised of E, A and B phase prototype parts. A prototype of the 067-0912-00 Analog Test Card knits the analog scope together. It looked like a 7854 with a keyboard and extra intensity control for the STORED WFM, but it operated as a 7804N, as in no readout. With some time on my hands and a lot of scraps in the basement, including a readout board from a 7603, I thought that it was time to make this old carcass a bit more presentable and useful. In the end, it's a bit like Johnny Cash's car from the song "One Piece at a Time," although nothing was smuggled.

I have posted a few photographs of my one-of-a-kind 7804. Perhaps Dr. Frankenstein had a similar thought; I consider it more Fan Art rather than blasphemy.
/g/TekScopes/album?id=271755
 

For this thing, the serial tag on one rail is E01. I would guess this one was started in 1976 or 1977, long before production release. Many boards are labeled by hand for the specific prototype such as A06. During development, a prototype was given a numeric designation such as A06 to track which units had which versions of specific boards or software. This analog hardware should do most of what a production unit can do. I have a working 7854 and some spare digital boards but the time to make my scrap unit into a working and reliable 7854 is more than I want to spend. For now, it¡¯s something fun to have until I have to raid it for replacement parts.
 

Is there ANY possible way that I could get some pictures of the 067-0912-00 card. I have a few 7854's in the lab that need repair and calibration and I am in the middle of the process of recreating the analog test card for calibration purposes. Some photos if available would be amazingly helpful in finalizing the details wail I am stuck waiting for some agonizingly long ship times for some of the components.

Zen

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Clark Foley
Sent: Saturday, January 15, 2022 8:11 PM
To: [email protected]
Subject: [TekScopes] Something to do with 7000 series scraps

For your amusement:
As with the work of Dr. Frankenstein, some might find this blasphemous and others might just find it to be a good use of scraps. For many years (it always starts that way), I have had an early prototype 7854 carcass without functioning digital cards. It is only the analog section of the 7854 and it is comprised of E, A and B phase prototype parts. A prototype of the 067-0912-00 Analog Test Card knits the analog scope together. It looked like a 7854 with a keyboard and extra intensity control for the STORED WFM, but it operated as a 7804N, as in no readout. With some time on my hands and a lot of scraps in the basement, including a readout board from a 7603, I thought that it was time to make this old carcass a bit more presentable and useful. In the end, it's a bit like Johnny Cash's car from the song "One Piece at a Time," although nothing was smuggled.

I have posted a few photographs of my one-of-a-kind 7804. Perhaps Dr. Frankenstein had a similar thought; I consider it more Fan Art rather than blasphemy.
/g/TekScopes/album?id=271755
 

Hey Clark, like your FrankenTek a lot :o)! Good idea to continue the 7000 product line with yet another nice product (guerilla projects sometime turn out to be the best ones...).
BTW: great artwork, congrats!
Chris
 

You can find a photograph of the early Mode Control board at the TekWiki page for 067-0912-00. You have probably been there already. Mine does not have the perfboard addition hanging on it. The circuitry was the starting point for designing 067-0912-00.
 

I made a mistake due to brain half-life. The serial number on the lower chassis is not E01. It is E-02.

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