Hi Dale,
If you're connecting a real loudspeaker to that radio, there is zero
need for bonding it to the radio chassis. Loudspeakers are not
"ground-referenced." A loudspeaker with a built-in amplifier presents a
different problem -- the input of the amplifier is usually unbalanced,
and the output stage of the radio may not like having one side of its
output connected to the chassis. This would NOT be a problem if the
radio's output stage is transformer-coupled, but it COULD be an issue
with one that is not. That said, I would be rather surprised if a Ten
Tec radio was designed with an output stage has that problem.
73, Jim K9YC
On 7/26/2017 8:35 AM, dale via TenTec wrote:
Reading in the jupiter manual, it states the external speaker jack is not grounded
and the output is floating. I have seen suggestions that a audio isolation
transformer should be put on line between the radio and speaker. Suggesting if you
don't you can short out the audio amp in the jupiter. about as many also said they
just plugged in their 1/4" phone plug and every thing worked fine.
I looked at the drawing of J5, the the ext speaker jack I see no chassis
ground , is the jack isolated from ground? as long as the speaker in the
external,desk speaker
is also not grounded to the speaker case. why would you need a isolation
transformer?
Maybe Iam missing something
73
dale
wt4t
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|