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An interesting dilemma, Tony, which I would guess is unrelated to your
positive ground (However, I very much support your decision to have
permitted the car to remain as the works built it - hence I am biased on
this one).
You say that at idle you have circa 13+ volts across the battery. This
gives rise to my questions:
1. At idle, with radio on, how many volts do you have at the radio?
2. At running speeds, with radio on, how many volts do you have at the
radio?
If there is a significant voltage delta between the answers to 1. and 2.
above, it could be the reason for your problem. If not I am at a loss
to explain what is happening.
I agree with your thinking the radio should produce adequate volume with
13 volts on the power leads. However, that is not to say it will not
become louder still at even higher voltage.
Bruce Burrows
'59 MGA basket case
'60 Daimler SP 250
'61 Daimler SP 250
'73 MGB driver
My Dart website (not my cars!):
http://community-2.webtv.net/guardian45/THEDAIMLERSP250DART/
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Date: Wed, 19 Apr 2000 09:35:28 -0700
From: "Tony Woodruff" <tonyw@mailmedia.com>
To: <mgs@autox.team.net>
Subject: Dynamo / Generator Question
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Reply-To: "Tony Woodruff" <tonyw@mailmedia.com>
My 67 (actually mid-66) MGB roadster has the stock positive ground / dynamo set
up.
Is it normal that at idle my radio, etc. should be "starving" for electricity -
or is this a sign of a failing unit? The radio gets really quiet and won't
pull in a signal at all unless the engine revs are up around 2000 RPM.
At speed the battery is getting plenty of current to keep itself charged up.
At idle I see 13-14 volts across the terminals - so it looks OK from that
perspective.
The thing is that at the times I'm waiting at a stop light - and not enjoying
the thrill of moving about in my LBC - the darn radio won't work! (of course
it doesn't work very well ever.....)
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