My AT-140 installation manual says to avoid connecting to the engine block
or the DC system ground. From everything I have read the tuner,
transceiver and TNC must be grounded to the same point to avoid ground
loops. The transceiver and TNC are connected to the system DC ground so
if
you are going to take advantage of the keel or the engine for the RF
ground
you need blocking caps.
--
Glenn Ashmore
I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com
"Larry" <noone@[EMAIL PROTECTED]
> wrote in message
news:Xns9A8C6416C1A4Bnoonehomecom@[EMAIL PROTECTED]
> joost <joost.jager@[EMAIL PROTECTED]
> wrote in news:b1a9e798-612a-4ad9-96fc-
> a630e4f096c2@[EMAIL PROTECTED]
>
>> Hi all,
>>
>> I´m planning to build a DC block for the SSB ground strap. The article
>> Marine Grounding Systems, http://www.sailmail.com/grounds.htm,
>> discusses how to make this and suggests the type of capacitor to use.
>> It´s the Type X7R Monolithic Ceramic capacitor, 0.15uF, 100 volt.
>> Unfortunately I can only obtain the 50 volt version in the place where
>> I am now (Whangarei, New Zealand). Are there any opinions on whether
>> this will also suffice? I´m transmitting using a 100W Icom 718 SSB
>> transceiver.
>>
>> Joost Jager.
>>
>
> Why do it all over again? The tuners, such as the Icom AT-140, already
> have DC blocking capacitors built into them between the tuner and its RF
> Ground terminal. Why put another one in series with the one already in
> the
> tuner??
>
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