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 <[email protected]>
wrote:
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 and have a 2-wire
line cord. Such is because the bypass capacitors actually pass a very small
current AC voltage to the chassis. Since both sides of the AC line are
bypassed, the voltage is divided and about 1/2 of the AC line voltage can be
measured between the chassis and a good ground. Also, if the chassis is not
grounded, you can often feel a little "tickle" when you touch the cabinet.
Remember, when the unit was new, the instructions said to connect an adequate
ground to the chassis before plugging the unit into the AC mains. Adding the
3-wire line cord with the green wire connected directly to the chassis gets the
chassis grounded and there is not a "tickle" when you touch the cabinet.
When you start on the AC / DC receivers, let me know the model numbers and I
probably have schematics, etc., available and can tell if the unit is a "hot
chassis" or not. Also, I can usually tell you the safest way to wire the
3-wire cord.
Glen, K9STH
Website: https://k9sth.net
On Wednesday, August 7, 2019, 09:08:51 AM CDT, Maury Guzick
<[email protected]> wrote:
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 chassis. There have been a number of mods
under the chassis. So I want to have a better understanding of how to rewire
the power cord.
I also am looking at some antique radios that are AC/DC types that will need
new cords, so this inquiry is multipurpose.
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