Discussion:
What color is an Eico "Peak to Peak" probe
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o***@tubes.com
2017-04-10 09:29:08 UTC
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Eico made 5 probes. They were all color coded.

= Scope Probe =

EICO PDW Scope - Direct Probe - Yellow
EICO PLC Scope - Low Capacity - Red
EICO PSD Scope - Demodulator - Green

= VTVM Probe =

EICO VTVM - RF Probe PRF - Blue
EICO VTVM - Peak to Peak PTP (Model PTP-11 or PTP-25 (color unknown)

This PTP one seems to be rare, and I can not find out what color they
were. I googled (images) and could not even find a picture.

Anyone know?
Foxs Mercantile
2017-04-10 14:25:04 UTC
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Post by o***@tubes.com
Eico made 5 probes. They were all color coded.
More information which may or may not be of value
<http://www.antiqueradios.com/forums/viewtopic.php?f=8&t=97697>
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o***@tubes.com
2017-04-10 18:26:02 UTC
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Post by Foxs Mercantile
Post by o***@tubes.com
Eico made 5 probes. They were all color coded.
More information which may or may not be of value
<http://www.antiqueradios.com/forums/viewtopic.php?f=8&t=97697>
Thanks for the url. I did find a lot of useful info on that site.
However, not the color. I already have a PDF file that has the schematic
for all 5 of these probes. and could build them fairly easily. However
since I own and like Eico gear, I will continue to look for their
original probes, and hope to get the whole set.

They also had a high voltage probe, made mostly for measuring television
HV to a CRT, and I do have one of those but doubt I will ever need it,
since I do not work on old tv sets. Few people seem to want old CRT tv's
these days.

I also believe they later made a probe called a "Uni probe". I have yet
to find out the purpose for that one...

I will say that in my opinion, Eico had some of the best probes ever
made. They were well made, easy to repair, and fit nicely in the hand.
Plus the color coding made them easy to select.

(I just saved all the graphic files from that web URL. Lots of valuable
info there).
Jim Mueller
2017-04-10 23:45:51 UTC
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On Mon, 10 Apr 2017 14:26:02 -0400, oldschool wrote:

Here are three files which cover various Eico probes, including the Uni-
Probe: http://bama.edebris.com/manuals/eico/eicoprobes/. The Uni-Probe
was a VTVM probe with a built in switch for the 1M resistor so it could
be used for AC or DC volts (assuming the meter used the same connector
for both). It had a black body with a red tip. The tip rotated to
operate the switch and had embossed lettering filled with white to
indicate which position it was in.
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Foxs Mercantile
2017-04-10 23:50:48 UTC
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Post by o***@tubes.com
I also believe they later made a probe called a "Uni probe".
I have yet to find out the purpose for that one...
That's the "White one."
You pull on the round nose and give it a 1/2 turn with a
marker at "Volts" or at "Ohms."

At ohms it was direct, at volts it had the appropriate
series resistor.
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Jeff-1.0
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http://www.foxsmercantile.com

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