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Hi all, Just an update on this. I finally got around to doing cal on this 2225 and it's quite clearly still a tiny bit sick in the power supply department. The 8.6v rail has a ridiculous amount of

OK... Now how do we get files to you?? Do you have an FTP site?

I would like to get is as soon as possible... That is not a problem, I do have a real DOS 6.22 machine. That's not a problem either -- I have proper desoldering station as well as EETools TopMaxII

I will give you the latest software I received if you want when the time comes... Warning!!?? It runs under DOS... (And it Won't work on DOS emulator from within Windows-- I tried!). I booted off CD

On Thu, 7 Dec 2017, Jan J wrote: I do also have 1761 without SCH and 1750 (or whatever -- don't remember right now) with SCH board so I would like to make a PAL/NTSC 1761 (if my dementia serves me

Glad to see someone who understood the hoops I jumped through!!!

Absolutely! Burt, K6OQK At 07:36 AM 12/7/2017, Chuck Harris wrote

Just to remind folks, this kind of stuff is exactly the reason this group exists. We are all about tektronix, and other stuff that interests us. What interests us? You decide. -Chuck Harris Burt K6OQK

Jan, I enjoy your "wordy" offerings. It's like sitting down with a good book. Burt, K6OQK :) At 04:48 AM 12/7/2017, Jan J wrote When I found the SCH option board from a 1750 scope, I contacted Tek to

I started this project about 4-5 months ago.... The reasons for adding SCH Option are as strange as the trip I took getting it to work... I am a retired TV Maintenance Engineer... (ABC). Also a Video

Hi Jan, That is truly strange. Are the later models 176xSC still under Tek support? And I suppose it is possible that there was some customer proprietary information in that setup program that may

When I found the SCH option board from a 1750 scope, I contacted Tek to see if it was a 'drop in' replacement. They said 'Yes'.. Really it's "NO" I was then given some software (DOS) that would

One of my customer's 2465B's was really a 2445B, ala the ebay guy's handiwork. It was an early model that had the CMOS RAM and a battery. The handyman removed the CMOS RAM, left the battery and all of

When I changed the Dallas NVSRAMs in my 2440, I did some experiments to see if they could be used as low power battery backed up SRAMs by maintaining the supply voltage above the point where the

Tektronix was always good about sharing parts and ideas among their product line. Looks to me like it could share a lot in common with the 2465 family. Not bandwidth, so much, but certainly CRT drive

Does Composite, Component Waveform and Vector/Diamond display.. Plus,? Time Code, Audio, and SCH.. SCH is an option board... I don't know if this forum supports pictures... if it does, here is what a

-CS does more than latch the address. Like DRAM, FRAM uses sense amplifiers which must be precharged before each read operation. When -CS is high, the sense amplifiers are precharged in preparation

Obviously. I was simply expanding on what you stated to include the early 2465B and 2465A. I can't say that I have ever run into the 1700 series.. Isn't it a vector scope, or something like that?

You got lucky, as the 1225 chip behaves exactly like the CMOS RAM chip that it contains... a 6116 type.. Your EPROM programmer happened to do it accidentally right. It wasn't on purpose as the FRAM

Also, the Tek 1700 series relies on battery within 1225 only... no other battery...