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I don't know shy this has not been mentioned but the 475M is the same as the 475A with some mechanical differences. If you want to compare the 475M to the 475, use the 475A. This is quoted from the

That was my typo on the 2N918. Of the 3 you list is one offer any better performance? 2N2222, 2N3904, and 2N4401 Thanks

It is 2N918 and not 2N198. The 2N918 was a very common early VHF transistor. My 184 has 2N3605 transistors as well. The 2N918 is: 900 MHz @ 4 mA 30 Vcbo 15 Vceo 50 mA From the Tektronix parts book the

Thanks Victor, the heat sink is actually electrically isolated. It also has just enough clearance that you would really have to do some damage to the scope in order to get it to impact. Good piece of

Doubtful it's heat related. The chip runs at ~117F with no heatsink, that's pretty low. Search for U800 you'll find hundreds if not a thousand posts on the subject. Be careful with how large a

The problem is that the transformer is very fragile and is almost invariably the broken part. It is also unrepairable. Spare transformers, if they are good, could in theory help revive a "for parts"

I have been asked about price several times. I am asking $650 for the 495P and $500 for the TR503. The screen discoloration is not burn in. It is really not an issue, but I want to want it out ahead

Is all of this heat related? One of the first things I did when getting my 2465BDM was strap a very large heat sink to the U800 chip with good quality thermal compound and very secure mounting. It's

Now that I think about that is the 2N198 missing a digit? They are all listed in the SM as 2N198, semms like the last digit is missing?

I have another transistor question on this one. The unit is up and running as stated and looks to be within specs. I was checking the rest of the transistors on the countdown board and their are quit

Hi Chip, That was me! I do remember because you were very nice with the refund even though I had left Pos FB already. Not many would do that. I have seen three main failure modes on U800: 1. The trace

You can often pick up a "for parts" P6042 for the price he is asking for just the sensor. The only problem with that approach is that you might end up with a few P6042s and no time to fix them...

So, with the help of the folks here and some troubleshooting, I've gotten my 475 closer to being usable again. However, I'm stuck at a new spot now. I am getting almost perfect voltages at each test

--- In TekScopes@..., David DiGiacomo wrote: > > On Sun, Jan 20, 2013 at 11:00 AM, Steve wrote: > > TekScopes@..., David DiGiacomo wrote: > >> > >> The 475M service manual is

That's why I said it's possible. Looks the same to me. Jam that guy in there and it should work. The P6042 is captive to the main unit, and the A6302 is the same probe but with a connector and a

Why do you say it's a P6042 part? The seller is claiming it's for an A6302, is that incorrect? I thought the P6042 used the 120-0464-00 and 120-0464-01.

It's not the greatest, sure, but it might be good enough for someone. It is expensive though.

To avoid reflections from the unterminated input of the scope. Try connecting a fast rise generator (10MHz square wave would be fine) to the scope through an unterminated cable, then add a terminator.

On Sun, Jan 20, 2013 at 11:00 AM, Steve <ditter2@...> wrote: > TekScopes@..., David DiGiacomo wrote: >> >> The 475M service manual is Army TM 11-6625-2735-14-1. >> >> You can

I have run KiCad under MacPort wine very well on an older Mac with no issues.