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There is a starter capacitor involved

Hi all,

The fan on my scope was very noisy, so I pulled the back apart and got the fan apart from the shroud, only to find that the wiring is soldered in with no way to get the fan out to work on it.? So.... I cut the wires. Now, in the process of returning it to the scope, I've been reconnecting the wires, BUT in my clumsy style I managed to pull the shortest of the four (the black one) out of the back while attempting to strip it!? Grrrr.

So, now I can't tell where the wire connects to the scope!? I have three different schematics (manuals) and NONE of the three show a fan with FOUR wires!!!? Only three...... What the heck?!?

Is there anyone here who can shed some light on what I should do now?? That is... after I shoot myself!

Thanks in advance for anything you can suggest.

Phil

I was hoping someone could say, "I used one when I was at tek", or "I bought mine at the country store"...
I guessed from the dimensions and hardware that it was probably a 585, or similar... the 585 would have one of the biggest transformers of the common 500 series.

also guessed that it was simply the bottom of the 585, as that is where all the power supply stuff was located.
Seems smaller than a 500 series scope, though.

======================================================================

Mine came via the Country Store.

Deane Kidd supplied me with the nine page hand drawn schematics and calculations that CAL HUNGEL produced dated 09-10-59, 09-11-59, 09-18-59 and 07-28-60. HUNGEL noted that the transformer would be from a 545 or a 585.

My memory is telling me that the main frame is from yet a different 500 series unit. My E-PS is on the bottom of a stack so I'll not be looking for what I feel is there. I remember that there are part numbers or other information to show which scope donated the frame.

It measures 11x8x21 HWD so it is definitely not of the 545/585 size. From my memory of ~25 years ago when I purchased it, there seems to be a number 'three' in the donor, like 503 or 530 or?


Rolynn
Tek Bvtn and Sunset 1966-1971

I uploaded the photos taken from having the feet installed on Bert's 314 to the photo gallery this morning. The album name is "Tektronix 314 and 335 Replacement Feet"


Jeff

________________________________
From: [email protected] <[email protected]> on behalf of toby@... <toby@...>
Sent: Thursday, March 29, 2018 1:31 PM
To: [email protected]
Subject: Re: [TekScopes] Back feet for 335 scope

On 2018-03-29 3:19 PM, Jeff Davis wrote:

Hi Bert,


I think you want to send the photos to me, not Lee (Lee was test fitting the feet on his 335). I was the one who
sent you the samples. You can send the photos to me at n0dyjeff@... or jeff@....


Thanks!

Jeff

It might be good to post pics to the gallery here, for other people
contemplating ordering replacement feet?

--T

I actually have the TEK documentation on this unit as I have one on my bench.

I did share as much as I could on the wiki, but was not able to upload the schematics. I acquired mine through an ex-TEK employee whom brought it home from the company store decades ago.

Stan Griffiths and I determined it to roughly be a PSU rack from the Type 585 Oscilloscope.

Very nice piece for gear really.

Hope it helps.

Cheers,

David

On Mar 30, 2018, at 12:37 PM, Chuck Harris <cfharris@...> wrote:

Nice to say, but could you explain how you know?

-Chuck Harris

Pete Lancashire wrote:

It is Tek

-pete ex tekkie

On Fri, Mar 30, 2018, 8:55 AM Chuck Harris <cfharris@...> wrote:

I have a bit of doubt that tektronix had anything
to do with that supply. It looks more to me like
something someone bodged together out of an old
scope.

It is Tek

-pete ex tekkie

On Fri, Mar 30, 2018, 8:55 AM Chuck Harris <cfharris@...> wrote:

I have a bit of doubt that tektronix had anything
to do with that supply. It looks more to me like
something someone bodged together out of an old
scope.

I have a bit of doubt that tektronix had anything
to do with that supply. It looks more to me like
something someone bodged together out of an old
scope.

If you look on the front panel, which is where the
bottom of the scope it was built in would be, there
is a scar that is typical of a bottom of a scope.

The only thing that looks tektronix to me is the
knobs, case, and logo on the panel. The panel looks
to me to be hand lettered using rub on letters.

-Chuck Harris

Michael A. Terrell wrote:

Well designed test fixtures are an asset to any company. One of my

former employers cut corners on their in house fixtures, and it cost us a
lot more than proper fixtures would have. Some needed constant repairs, and
were built from samples, or obsolete inventory so there were no spare
parts. Another problem was that some employees that they could modify them
on a whim, since there were no control documents. I'm sure that somewhere
documents existed for that item at Tektronix, and it might even be in that
microfiche library at the museum.

Well designed test fixtures are an asset to any company. One of my former employers cut corners on their in house fixtures, and it cost us a lot more than proper fixtures would have. Some needed constant repairs, and were built from samples, or obsolete inventory so there were no spare parts. Another problem was that some employees that they could modify them on a whim, since there were no control documents. I'm sure that somewhere documents existed for that item at Tektronix, and it might even be in that microfiche library at the museum.

From: Richard Solomon <dickw1ksz@...>
Sent: Mar 30, 2018 10:46 AM
To: [email protected]
Subject: Re: [TekScopes] An actually rare Tektronix item

That most definitely was NOT done
by Tektronix.

Too bad, nice piece, even without
any documentation.

73, Dick, W1KSZ