To: boatanchors@puck.nether.net
Subject: Re: [Boatanchors] Article on changing from 2 to 3 wire power cords
Old farm houses didn't have ground paths in the living rooms.
So, we were probably safer there than in the barnyard with a couple of
angry mules.
Don W4DNR
Quoting Wilson Lamb :
> BIZA
I faced this dilemma with my 'novice' Hallicrafters S-38D. The situation
was complicated by the fact that the outer case of the receiver is metal
and the chassis kinda floats on fiber stand-offs, but not really, having
a 10K resistor between it and "B-"
I moved the power switch to the "hot"
it worked
73
W2HY
- Original Message -
From: "Wilson Lamb"
To: donro...@hiwaay.net
Cc: boatanchors@puck.nether.net
Sent: Thursday, August 8, 2019 2:20:34 PM
Subject: Re: [Boatanchors] Article on changing from 2 to 3 wire power cords
And I thought I'd seen everything!!!
Using the ground connection for the neutral AC mains connection was never a
good idea! But, doing so did make transformerless units a little bit safer IF
the ground wire was connected before connecting to the AC mains. If the ground
wire was not connected first, then a whole lot more unsafe
reading tells you, there is a problem- fix it. Russ
wb3fau
-From: "Glen Zook"
To: "Wilson Lamb"
Cc: boatanchors@puck.nether.net
Sent: Thursday August 8 2019 4:52:34PM
Subject: Re: [Boatanchors] Article on changing from 2 to 3 wire
Not all that uncommon in the "goode olde dayes"! Since the neutral was
supposed to be connected to a ground rod where the AC mains enters the
building, and since that connection used to be almost always a cold water pipe,
having only the "hot" side connected on the AC plug, the chassis was
puck.nether.net
> Sent: Thursday, August 8, 2019 2:20:34 PM
> Subject: Re: [Boatanchors] Article on changing from 2 to 3 wire power cords
>
> And I thought I'd seen everything!!!
> That's a new one.
> WL
> - donro...@hiwaay.net wrote:
> > I recall listening to my un
- Original Message -
From: "Wilson Lamb"
To: donro...@hiwaay.net
Cc: boatanchors@puck.nether.net
Sent: Thursday, August 8, 2019 2:20:34 PM
Subject: Re: [Boatanchors] Article on changing from 2 to 3 wire power cords
And I thought I'd seen everything!!!
That's a new one.
WL
- donro...@h
And I thought I'd seen everything!!!
That's a new one.
WL
- donro...@hiwaay.net wrote:
> I recall listening to my uncle's shortwave radio and there was a
> ground wire going outside and to the metal plumbing pipe. The AC
> cord only had one blade on the plug. I think I was a teenager
I recall listening to my uncle's shortwave radio and there was a
ground wire going outside and to the metal plumbing pipe. The AC
cord only had one blade on the plug. I think I was a teenager before
I understood how that worked.
Don W4DNR
___
Glen
This is all good stuff. I will get back with you when I start to tackle the
receiver.
73
Maury
On Wednesday, August 7, 2019, 3:26:06 PM CDT, Glen Zook
wrote:
With a 2-wire line cord and the AC line bypass capacitors, if the chassis is
not connected to a suitable ground, there
All boatanchors here get hooked to earth ground before power is
applied. Russ
-From: "Glen Zook"
To: "Eric", "Maury Guzick"
Cc:
Sent: Wednesday August 7 2019 4:26:00PM
Subject: Re: [Boatanchors] Article on changin
With a 2-wire line cord and the AC line bypass capacitors, if the chassis is
not connected to a suitable ground, there will be a very low current AC voltage
equal to 1/2 of the AC line voltage on the chassis. This is true of virtually
all of the "boat anchor" units that are transformer powered
Hi Al
Thanks for the info. The HT32 has been in AC for almost a year, so I don't
think moisture will be an issue also, the rectifiers have been solid stated.
But, I am unsure of any thing else except there has been a relay replacement
with the new one hanging unsecured under the chassis. I
Hi Maury,
The HT-32 is a great xmtr, I use mine weekly. But there are a few
"gotchas" in it.
First off, don't power it up yet (or again). The HT-32 & HT-37 (plus
other Halli xfmrs) are prone to picking up moisture if in storage for
any length of time. The HV winding will short to one of
According to Wikipedia, on a subject entitled Cheater Plugs, "In 1969
Underwriters Laboratories mandated three-prong plugs on major appliances for
safety", and "At that time, only half of the receptacles in US homes were
three-prong." Additionally, "In 1971, the US National Electrical Code
s] Article on changing from 2 to 3 wire power
cords
Just as a data point, the house I grew up in was built around 1952 and
used the two equally sized outlets. Seems the addition, added on in or
about 1961 used the three pronged outlets. I also remember buying
lamps in 1977 that had two equally si
Just as a data point, the house I grew up in was built around 1952 and used the
two equally sized outlets. Seems the addition, added on in or about 1961 used
the three pronged outlets. I also remember buying lamps in 1977 that had two
equally sized prongs, something you won't see today.
Dave
I live in an older home.
Before the knob and tube wiring was replaced a number of years ago, the
original electrical outlets had only two slots and they were both the same size.
Does anyone know when three prong plugs and polarized plugs and their
respective receptacles came into use?
I appreciate all the replies.
I have been replacing worn out 2 wire power cords with newer 2 wire cords of
similar style on radios with one side grounded to the chassis.
I am at the moment looking at bringing back to life a HT-32 I got for $10. But
the AC is or has been lifted off the
What is the model?
Some AC / DC receivers have a "hot" chassis and some do not. Even those with a
"hot" chassis are wired differently and things can be slightly modified to make
such more safe.
Glen, K9STH
Website: https://k9sth.net
On Tuesday, August 6, 2019, 04:34:01 PM CDT, Maury
My very unlearned opinion.
Connecting a supposed to be floating metal cabinet to the grounding wire
and then using the hot and neutral wires to connect to the chassis
inside the cabinet would protect against the cabinet from "going hot".
As far as I know this is the entire purpose of the
I suspect we should make this a little broader in scope, don't you
think?? The concept (design approach) of the AC/DC design of low-cost
electronic equipment carries with it the understanding that this is a
"hot chassis" design that is constructed to operate inside an insulated
MOVs have tendancy to blow up. i wont use them. Russ wb3fauFrom:
"Maury Guzick"
To: "Boatanchors Reflector", "Glen Zook"
Cc:
Sent: Tuesday August 6 2019 5:33:14PM
Subject: Re: [Boatanchors] Article on changing from 2 to 3 wire power
cords
Hi Gle
Hi Glenn,
Long time.
Yea, it's the tricky AC/DC I am concerned about.
What about using MOV's, thought I read something about them not being
recommended to use anymore in boatanchors?
MauryW5IO
On Tuesday, August 6, 2019, 4:28:46 PM CDT, Glen Zook
wrote:
I don't know of any
I don't know of any article on doing this. However, it is a very simple thing
to do.
Black wire goes first to the fuse and then to the off / on switch. If no fuse,
add one!
White wire goes to unfused side of the power transformer. If there is a fuse,
it should be rewired in the black lead.
I have read a couple of different ones in the past, but can't seem to find any
on data base searches.
Does anyone have a reference for this?
TNX
W5IO
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