15 Nov
2016
15 Nov
'16
1:15 p.m.
One of the DC filter capacitors has gone open circuit in my Tektronix 4051.
It is a SPRAGUE 9600 uF - 30VDC with a little bit unusual foot print.
It might be common for other Tek equipment.
Google turned up one Ebay-hit for a completed auction but that's it.
Anyone has a reliable source for this type of capacitor:
http://i.imgur.com/P0Nz5KW.jpg
15 Nov
15 Nov
1:29 p.m.
If you can't find a replacement that is "NEW" and by that I mean made in
the past couple years ...
It has been > 30 years since I've been inside a 4051
your best bet might bt to take an axle (wires out both ends) leaded cap and
doing things like standing it on end and use a wire that runs down the side
to where the can connected, make sure the wire is insulated and then use
heat shrink to mechanically secure it.
Electrically the wire should be at least hmmm ... 18 AWG, I'd see if 16 AWG
would fit. The issue is your adding resistance but since you only working
with 60 (or 50/120/100) Hz that shouldn't be much of a problem.
-pete Ex Tekkie
On Tue, Nov 15, 2016 at 10:15 AM, Mattis Lind <mattislind at gmail.com> wrote:
One of the DC filter capacitors has gone open circuit
in my Tektronix 4051.
It is a SPRAGUE 9600 uF - 30VDC with a little bit unusual foot print.
It might be common for other Tek equipment.
Google turned up one Ebay-hit for a completed auction but that's it.
Anyone has a reliable source for this type of capacitor:
http://i.imgur.com/P0Nz5KW.jpg
2:11 p.m.
On Nov 15, 2016, at 1:15 PM, Mattis Lind
<mattislind at gmail.com> wrote:
One of the DC filter capacitors has gone open circuit in my Tektronix 4051.
It is a SPRAGUE 9600 uF - 30VDC with a little bit unusual foot print.
It might be common for other Tek equipment.
Google turned up one Ebay-hit for a completed auction but that's it.
Anyone has a reliable source for this type of capacitor:
http://i.imgur.com/P0Nz5KW.jpg
That's fairly conventional PCB mounted electrolytic. Do you need it PCB mounted?
Does it need all those legs to keep it in place?
A search on Digikey turns up hundreds of can type electrolytics, about 300 in the 30-50V
range at 10,000 uF. I looked for "snap in", they look pretty similar though the
precise footprint is not quite the same. Or you might use one with wires, and bend them
to fit the existing holes.
paul
2:24 p.m.
A lot of antique radio restorers prefer to cut open the can near the base,
remove the innards, and replace it with a modern (much smaller) capacitor.
Gluing it back together and polishing it up can make it look pretty close
to original.
Here's a pretty good write-up:
http://www.faultlineaudio.net/the-work-bench/2013/1/15/restuffing-a-multi-s…
Kyle
3:18 p.m.
Kyle wrote...
---------
Here's a pretty good write-up:
http://www.faultlineaudio.net/the-work-bench/2013/1/15/restuffing-a-multi-s…
----------
Great idea. May give that a shot... unless we can get a group buy to have TU-56 motor run
caps built......
J
3:29 p.m.
tisdag 15 november 2016 skrev Kyle Owen <kylevowen at gmail.com>:
A lot of antique radio restorers prefer to cut open
the can near the base,
remove the innards, and replace it with a modern (much smaller) capacitor.
Gluing it back together and polishing it up can make it look pretty close
to original.
Here's a pretty good write-up:
http://www.faultlineaudio.net/the-work-bench/2013/1/15/
restuffing-a-multi-section-can-capacitor.html
This was a really good description on how to do it. I will look into this
method unless I find something else.
I maybe wasn't clear on that I already replaced the cap with a few simple
leaded types. It was not such a good fit mechanically so although I am not
fanatic of preserving the innards of the machine it would very good to have
cap with the original type of pin layout.
/Mattis
Kyle
2:25 p.m.
Mattis,
On travel right now, but when I'm back next week I can see if our local shop (Anchor)
has an exact replacement, I have had good luck there. If not of course a hack with a
modern cap will do.
Marc
On Nov 15, 2016, at 11:15 AM, Mattis Lind
<mattislind at gmail.com> wrote:
One of the DC filter capacitors has gone open circuit in my Tektronix 4051.
It is a SPRAGUE 9600 uF - 30VDC with a little bit unusual foot print.
It might be common for other Tek equipment.
Google turned up one Ebay-hit for a completed auction but that's it.
Anyone has a reliable source for this type of capacitor:
http://i.imgur.com/P0Nz5KW.jpg
2:37 p.m.
Great link! That's a great middle ground - preserves the look without having to find
the original cap.
Marc
On Nov 15, 2016, at 11:15 AM, Mattis Lind
<mattislind at gmail.com> wrote:
One of the DC filter capacitors has gone open circuit in my Tektronix 4051.
It is a SPRAGUE 9600 uF - 30VDC with a little bit unusual foot print.
It might be common for other Tek equipment.
Google turned up one Ebay-hit for a completed auction but that's it.
Anyone has a reliable source for this type of capacitor:
http://i.imgur.com/P0Nz5KW.jpg
3:44 p.m.
On 11/15/16 2:37 PM, Curious Marc wrote:
Great link! That's a great middle ground -
preserves the look without having to find the original cap.
Marc
> On Nov 15, 2016, at 11:15 AM, Mattis Lind <mattislind at gmail.com> wrote:
>
> One of the DC filter capacitors has gone open circuit in my Tektronix 4051.
> It is a SPRAGUE 9600 uF - 30VDC with a little bit unusual foot print.
>
> It might be common for other Tek equipment.
>
> Google turned up one Ebay-hit for a completed auction but that's it.
>
> Anyone has a reliable source for this type of capacitor:
>
> http://i.imgur.com/P0Nz5KW.jpg
You might look here.
https://www.tubesandmore.com/products/capacitors?filters=Type%3DMulti-Secti…
Note the "tube audio" folks gravitate to that stuff and tend to cause
seriously sick prices, because tubes.
For authentic look:
The easy way is remove the old carefully, gut it and install inside
several smaller modern electrolytics
of the proper ratings. Reinstall using the bottom bakelite terminal cap
and go your merry way.
Make it work again:
Pull the old out and replace with multiple smaller modern parts and move on.
Allison
9:30 p.m.
On 11/15/2016 12:15 PM, Mattis Lind wrote:
One of the DC filter capacitors has gone open circuit
in my Tektronix 4051.
It is a SPRAGUE 9600 uF - 30VDC with a little bit unusual foot print.
It might be common for other Tek equipment.
Google turned up one Ebay-hit for a completed auction but that's it.
Anyone has a reliable source for this type of capacitor:
http://i.imgur.com/P0Nz5KW.jpg
I can't say for sure, but the best place for caps is
Mouser. I've been able to source a number of special caps
from them.
Jon
2807
days inactive
2807
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9 comments
8 participants
participants (8)
-
ajp166＠verizon.net -
curiousmarc3＠gmail.com -
elson＠pico-systems.com -
jwest＠classiccmp.org -
kylevowen＠gmail.com -
mattislind＠gmail.com -
paulkoning＠comcast.net -
pete＠petelancashire.com