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You imagine that you are protecting yourself, but your
protection efforts remind me of the comic routines where
some hapless character gets dressed in a hazardous waste
suit, complete with a hockey mask, ski goggles, tongs, and
oven mitts all to take a soiled diaper out to the trash.

A linesman's glove so completely eliminates any dexterity,
that safe manipulation of something as tiny as an anode
lead is awkward at best... all to protect you from a zap
that is no more potent than a static zap to a doorknob in
the winter.

Latex surgeon's gloves during electronic work, is a fool's
folly beyond belief. The glove, by virtue of its sealed
nature will capture your hands sweat, covering them with
a highly conductive layer that is capable of reducing your
skin's protective resistance to a point where even 24V could
conduct enough current into your heart to be fatal.

Further, DC rarely if ever can cause a heart to enter a fatal
rhythm. It will, at most, skip a beat, and continue on in
its normal rhythm.

Stop trying to improvise safety, you lack the experience to
be able to recognize safe and unsafe methods. Instead, please
study some legitimate sources, and learn about HV safety, as
it pertains to TV and radio repair. If you can't, please,
please do your friends and family a favor, and take up stamp
collecting, or golf.

-Chuck Harris

nielsentelecom@... wrote:

Chuck,

The only use of the linesman glove was to put the HT anode lead

somewhere that would hold it from moving, and to keep it away from me. I
never implied to wear them while working in electronics, they also have a
leather shell glove to protect the linesman glove from damage.

But I do use latex gloves when doing this work, I'm not relying on them

to protect me, but rather to add a weak safety net, since I have them lying
around, they improve grip, and add a decent layer of uncertified
protection, but they tear easily.

This reply is a little dated I know, haven't been following the thread

for awhile.

NielsenTelecom

Chuck,

The only use of the linesman glove was to put the HT anode lead somewhere that would hold it from moving, and to keep it away from me. I never implied to wear them while working in electronics, they also have a leather shell glove to protect the linesman glove from damage.

But I do use latex gloves when doing this work, I'm not relying on them to protect me, but rather to add a weak safety net, since I have them lying around, they improve grip, and add a decent layer of uncertified protection, but they tear easily.

This reply is a little dated I know, haven't been following the thread for awhile.

NielsenTelecom

I have two 576, if you told me which test you need to compare, I will
do it with mine. Do you know ferrite core specs? Could be changed some
transformer HV turns for a voltage multiplier?



FERRITE CORE E 20 N27
Core Type : E
Core Size : E20/10/6
Core Material Grade : N27
For Use With : -
Effective Magnetic Path Length : 46.3mm Ae Effective Cross Section
Area : 32.1mm? Inductance Factor Al : 1.3?H Product Range : B66311
Series SVHC : No SVHC (15-Jun-2015) Accessory Type : Ferrite Core
Material Grade : N27 -----Mensaje original-----
De: [email protected] [mailto:[email protected]] En nombre de
peter bunge Enviado el: sábado, 24 de agosto de 2019 16:08
Para: [email protected]
Asunto: Re: [TekScopes] Tek 576 Curve Tracer HV Transformer winding

Thanks David for your generous offer;
Where do they get the cores to make a compatible transformer that
works in the 576 circuit. This is not a 115v 60 Hz transformer.
A friend suggested a plate transformer and doublers or triplers. 225v
is also needed.
I have been looking at using a 4 kV and 225 V switching power supplies
from China and I have used some for other projects. They tend to be
noisy but can be cleaned up.
Since my 576 is still working there is no great urgency.
I also want to look at my friend's 577 and compare it to my 576. His
is smaller and lighter but may not do as much.
My 576 does weird things at lower currents (all loops) and PNP do not
seem to work the same as NPN (lack of steps) so the transformer is not
the only issue. I spent a couple of days working on it a few years ago
but could not improve it.
I need to find someone with a 576 and compare traces to see if mine is
"normal".
I need the 1500v capability which rules out some of the newer ones
which are also more expensive.
I will think about your offer.
Peter

On Fri, Aug 23, 2019 at 4:28 PM drawding@...
<drawding@...

wrote:

Yes. David Rawding is still here.

: )

I bought five professionally made transformers. One was donated to
Bob for his kind help. Two were used by me. Two were sold. I am
all

out.

Another run is ~ $1k for 5 more. Five is the minimum order. A bit
pricey, I know. However, they are made by a professional
transformer company. Fully enclosed and potted in silicone. If you
consider what technical wages are today and overhead and materials,
I would say it is fair pricing. However, at the hobby level, it is pricey.

If we can find five buyers (though this seems unlikely), I will
handle the details, and will sell at my cost + shipping.

Also, as you can see from this thread several people have been
successful winding their own.

One gentleman came here a year or so ago, asked a bunch of
questions, got great support from the group, ended up successfully
winding his own, and left. He was asked to put some details
together (pictures, documentation, video, etc), but apparently could not be bothered.

I hope you find a solution.

Thanks,
Dave

On Aug 26, 2019, at 11:48 PM, atwood.1@... wrote:

Does anyone have the winding data for the 561 HV transformer? The manual shows it to be Tektronix part 120-225. thanks

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of garp66
Sent: 27 August 2019 04:04
To: [email protected]
Subject: [TekScopes] Tek 576 Curve Tracer wanted: Max Peak Volt / Series

& knobs & Multiplier pot bezel / fixture collar

hi,
Does anyone know about the following mechanical bits on 576 CT front

a) Max Peak Volt / Series Resistor linkage mechanism:
I am missing the dual knobs for this & the mechanical (coaxial ?) linkage

behind
the front panel to the actual rotary switch inside.
-- Does anyone have a spare linkage unit with the two outer knobs or a

b) The Multiplier Pot with its silver fine gradation knob:
my Multiplier Pot has been pushed in all the way, hanging inside the

-- How is this Pot re-afixed to the front panel ?

Is there a retention ring, bezel, collar or something ?
-- Does anyone have these bits or a detailed diagram ?

thank you,
rick

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of garp66
Sent: 27 August 2019 04:04
To: [email protected]
Subject: [TekScopes] Tek 576 Curve Tracer wanted: Max Peak Volt / Series Resistor mechanical linkage
& knobs & Multiplier pot bezel / fixture collar

hi,
Does anyone know about the following mechanical bits on 576 CT front panel ?

a) Max Peak Volt / Series Resistor linkage mechanism:
I am missing the dual knobs for this & the mechanical (coaxial ?) linkage that extends about 2"
behind
the front panel to the actual rotary switch inside.
-- Does anyone have a spare linkage unit with the two outer knobs or a detailed diagram of this ?

b) The Multiplier Pot with its silver fine gradation knob:
my Multiplier Pot has been pushed in all the way, hanging inside the instrument !
-- How is this Pot re-afixed to the front panel ?

Is there a retention ring, bezel, collar or something ?
-- Does anyone have these bits or a detailed diagram ?

thank you,
rick