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Hi all, I am looking to the group for suggestions/recommendations as I am in the market for a decent DSO. I currently have a TLS216, in fine condition, without probes (therefore not useful at all).

Would anyone have a Tektronix 011-0069-02 attenuator for sale at a reasonable price? I see them online for over $60 with shipping, but that is a bit too spendy for my pocket. -- Dale H. Cook,

Good morning, Does anyone have a 555 or 556 oscilloscope they would be willing to sell? I can take a road trip to pick up if you live within roughly 800 miles of Minneapolis, so any of these

For sure Michael. Big oaks from little acorns grow !!!! Good idea of yoyurs to post that photo, it help me a lot as none of the information I had listed or showed placement of those components. When I

Jim, Great News!? One never knows when one small component will completely disable an instrument.? Proving that every part is important, even critical to proper operation.? Michael

Hi Michael. Latest update. Scope is working again. Changed C963, replaced R963,. Had to readjust the pot,for the + 50 voltsupply, as +15 was showing +18, Trace seems reasonable and all controls

Gerry, thanks .The ( very good ) reference link talks about the "pull the knob" to engage the delayed sweep friction "clutch" and the spring which pulls? / holds it back in "normal " position.?

https://forum.tek.com/viewtopic.php?t=138253 This may be of help Gerry

Unless specifically noted in the parts list as a sorted or matched item then yes in general any known good 12AX7 should work. Replacement in some circuits "might" require re-calibration? but this is

Jamie, You can replace the audiophool gold standard tube (6DJ8) with a common 6BK7A. It's a TV tube so very little demand for them. Gain is a little higher and transconductance is a little lower but

Thanks for the alert, I try to avoid Epay. Bruce

Yes, this tube is definitely toast. It is all white inside, so it will have to be replaced. One that the audio guys love, too: 6DJ8. yahoo.com@groups.io> wrote:

Thanks for all the great info, guys. That helps a lot!

There are TWo of them, for parts, on e-bay

After almost a year of procrastinating I am trying to fix this "friction switch" / worn out problem. For whatever reason I can move the delay sweep switch , I painted the friction surface and it

sometimes when you eke, you end up saying eek!? once you see prices, availability, and the like. Harvey

"eke", not "eek".

Hi Jamie,? You might also ask yourself, "do I need to replace it"?? ?I would only recommend replacing a tube if it is KNOWN to be bad.? ?Tek circuitry in particular is very conservatively

One of the most important "criteria" used to justify the exorbitant price on E-Bay is the fact that the seller is offering them for sale, " I have it, therefore it is 'special'". My brother has

Very well stated, Dave! Especially the part I have highlighted.... ;-) Tom