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Greetings All, I recently purchased a 465 on Ebay UK, having now cleaned it up it's looking good, It seems to be working with a good sine wave on both channels from the calibrator, but the only way I

Hello Kerry, Just a correction... While the hypothesis of the ÷5 stage misbehaving is still sound and would cause exactly the symptoms you describe, I got wrong (and stated wrongly) that the slower

Hi Leo, I didn't see the photo(s) of your Schaffner AC inlet filter posted, so I put two photos in your photo album of some of the Schaffner filters I have that were taken out of some 22xx scopes.

Hello Kerry, I don't own a TG501 so I don't really qualify as an expert, but I downloaded the service manual from the Tekwiki (here: http://w140.com/smb/TG501_SM.pdf) and, by just looking at the block

Hi Tom and others, Sorry for my mistake of changing the subject, I have messed-up, so there are two threads now, I promise to not do that again... :-( Anyway, I added a picture of the two RIFA

Hi Miguel, That is definitely an odd number for an option. Up until now I would have said options are ALWAYS listed in the catalogs as opposed to modifications which are never listed. But I just

Hello I'm a newcomer to this group who has fairly recently acquired a SG503, PG506 and TG501 in a TM5003 module. All of these units are working fine, apart from the TG501 which shows some odd outputs

On Thu, Aug 16, 2018 at 03:43 PM, tom jobe wrote: > > Hi Leo, > Thanks for the progress report, It's good to see that your 2215A repairs > so far have gone well! > In studying your photos, it looks

Hi Leo, Thanks for the progress report, It's good to see that your 2215A repairs so far have gone well! In studying your photos, it looks like you have one of those dreaded "Schaffner" brand AC inlet

Yes and no. The ground lead for the probe, when properly attached, minimizes ringing on the signal. The long lead from chassis to chassis will not. For low frequency signals (especially sine waves),

Hi all, just a final message: it's all done! Today I received the 12V 60mm brushless fan that was a perfect fit. I used the half wave rectifier circuit I was able to place the components for on the

Which is optino 94 for a Tektronix 214? /g/TekScopes/photo/66992/0?p=Name,,,20,1,0,0

Hi Jennifer, It is appropriate to let the members of TekScopes know if you have any conflict of interest when you post an item for sale. Dennis Tillman W7PF

See http://www.eevblog.com/forum/repair/renovating-an-early-tektronix-475-oscilloscope-a-few-random-hints-and-tips/

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F362410334858

Yes, for best frequency response the ground lead should be short and the area between it and the probe minimal. You may see ringing and other strange stuff with your separate ground lead. Probably OK

Hello Folks, Thanks for all thoses interestings comments. As Ive reconnected the ground, and turned power ON : no differential main shut down occur, even when my finger played with chassis parts. I

Well, after a week on vacation, I replaced the old 18,000 uF, 16 V C821 with a new 22,000 uF, 25 V job that was the same diameter but less than half the length. I knew I was going to be out of town,

Our work benches vary quite a lot, and things found useful by some may not even be at others places: I have a relaltively common magnifying goose-neck lamp. The tubular fluorescent lamp surround a

Hi John, It's good to hear that you are making progress on your 475. Those large capacitors for the low voltage supplies in the aluminum cans often fail internally and do not show any bulging or other