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Hi Jim, If you look at the picture of this same board on the TekWiki website (here: http://w140.com/tekwiki/images/e/e0/Tek_464_internal_4.jpg) , you will see that those vias are also not filled with

HI, I must have suffered from a slow internet connection - I was able to get both documents. THANKS again.

I was able to download both just now. -- Richard Knoppow dickburk@... WB6KBL

Hello, I got the first of these (thanks!) but the second one seem to not be there. Have others been able to download the thing? Roy Morgan k1lky68@... <mailto:k1lky68@...>

ISTR a modification that synthesised the timing signals from the sprocket holes - with the obvious and not very important disadvantage of losing the timing calibration. They are easy enough to bodge

Thanks Sebastian, Interesting, Mine as well as the one Kurt posted back in 2008 have marking "PC" Both have (c) of 1965. Pics here - http://w140.com/tekwiki/images/1/1a/Tek_549_Storage_Board.jpg

Isn't that attached (as a pull) to the tunnel diode or part of the holder? Harvey

The recorder I have seems to have a full roll and I found a UK company that claims to sell it but at a stupid 'go-away' price (~30 bucks a roll!!) with an MOQ of ten rolls, so I'm not really tempted!

Do you have a source of the paper? If not then I prefer the XY chart recorder outputs, since they can drive a digitising scope and (theoretically!) allow it to be stored underwater :)

https://youtu.be/1zkkLSiBv4E wrote:

California air tools Amazon Prime hundred sixty bucks. Very quiet oil free excetera excetera. Gives you the pressure most desoldering tools need such as my metcal which needs 90 PSI.

Hi Tom, Had a look at the stripline and yes, I have a short bit of braid hanging out the end too, Fig 4-26 on Page 4-27 of the manual seems to show it just hanging loose (didn't know they were that

Thank you, Rajesh. Yes it seems so, as this one is #5202 (Portland facilities). The mod has been done in 1965, as both the board picture in the available manuals and my physical board have printed

just for reference, I DO see R1185 in my 549, Scope Serial # - 001295. May be the change happened in later Revs? regds Rajesh wrote:

Interesting material Kurt, so thanx for the good work. Maybe more in the pipeline from other scopes? René

Hi, I know this is an old post, but same puzzle here. Trimpot R1185 and nearby flood-gate related components (appearing in the available PDF manuals) aren't physically present in my storage board

500-series plug-ins such as the 1L20 put out 0.1V/division. In contrast, 560-series mainframes expect the vertical plug-in to put out about 19.5 V/cm, due the architectural decision to have the

No, and not that I'm aware of.... I'm sure some enterprising soul could come up with an adapter tho. The 561 takes 2xx, and 3xx series plugins. For a 561, you're looking for a 3L5, or 3L10.... See the

Fabio thanks for some reason I did not receive the PM responce but oh well I have it now. The only problem with your idea on this board is that none of the through hole vias is they were never

Would it fit in a 561? Is there a plugin adapter for that purpose?