-
Hi Guest!
You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
There are some perks with a member upgrade!**Upgrade Now**
(PS: Subscribers don't see this gawd-aweful banner
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
Share this page
OP
Guest
Guest
Guest
Offline
<blockquote><font size="1" face="Verdana, Arial">quote:</font><hr>Originally posted by adam90009:
you mean on the right? left is drivers side<hr></blockquote>
Yes, I meant right.
Bob
you mean on the right? left is drivers side<hr></blockquote>
Yes, I meant right.
Bob
Kim de B
Jedi Warrior
Offline
Wow, I guess I could have been more observant in the first place and noticed the right-hand drive!
Dreas, if you did check the Antique Automobile Radio web site, and look at the "Dealer Locator" link, there is a guy in Germany you might want to contact with questions.
I'm afraid I can't help you with what was "original" in radios that were installed by dealers in U.K. models. But certainly the radio such as I have (I sent you a photo) would be appropriate, and looks "right" for a 60s car.
Dreas, if you did check the Antique Automobile Radio web site, and look at the "Dealer Locator" link, there is a guy in Germany you might want to contact with questions.
I'm afraid I can't help you with what was "original" in radios that were installed by dealers in U.K. models. But certainly the radio such as I have (I sent you a photo) would be appropriate, and looks "right" for a 60s car.
CAUTION ON THE RADIO!
You could isolate the radio from the chassis, but you would have a problem when you connected an antenna to it. A radio antenna uses a shielded cable that gounds to both the chassis and the radio case. When you connected the antenna, the shield would create a direct short.
The adapter that is sold allows you to connect the radio case to the chasis and provides an dedicated power lead.
You could isolate the radio from the chassis, but you would have a problem when you connected an antenna to it. A radio antenna uses a shielded cable that gounds to both the chassis and the radio case. When you connected the antenna, the shield would create a direct short.
The adapter that is sold allows you to connect the radio case to the chasis and provides an dedicated power lead.
lawguy
Jedi Knight
Offline
<blockquote><font size="1" face="Verdana, Arial">quote:</font><hr>Originally posted by adam90009:
12 volts is 12 volt and it really doesnt matter what is the ground of the car and the radio doesnt know it either. just be sure to insulate it well and have fuses in all the lines just incase. you radio may get hot if it has an internal amp but becareful with it...<hr></blockquote>
But unlike an AC power source, the radio needs to be hooked up with the positive and negative going to the right places. They are not reversible.
12 volts is 12 volt and it really doesnt matter what is the ground of the car and the radio doesnt know it either. just be sure to insulate it well and have fuses in all the lines just incase. you radio may get hot if it has an internal amp but becareful with it...<hr></blockquote>
But unlike an AC power source, the radio needs to be hooked up with the positive and negative going to the right places. They are not reversible.
OP
Guest
Guest
Guest
Offline
no Adam, the magic smoke will get out. Transistors and such are polarity sensitive
I have a 1958 MGA 1500 and are looking for a radio,
please e-mail at mikmeg@aol.com with price .
thank you
please e-mail at mikmeg@aol.com with price .
thank you
Geo Hahn
Yoda
Offline
[ QUOTE ]
... The negative lead is grounded to the chassis in most radios if not all and you are right there would be a direct short. Maybe part of the kit is to insulate the chassis. What does the converter do guys?
[/ QUOTE ]
I suspect these inverters present 24V to the negative side and let the (negative ground) radio find 12V on the positive ground side making it think it is in a 12V negative ground environment.
As noted, the antenna also provides a ground so just insulating the radio body isn't enough. My TR3A has a negative ground radio in a positive ground chassis, but I insulated the radio body and the antenna and fused the ground wire. I was verrry careful to mount it securely and it has been fine for 20+ years but probably not the solution for everyone.
... The negative lead is grounded to the chassis in most radios if not all and you are right there would be a direct short. Maybe part of the kit is to insulate the chassis. What does the converter do guys?
[/ QUOTE ]
I suspect these inverters present 24V to the negative side and let the (negative ground) radio find 12V on the positive ground side making it think it is in a 12V negative ground environment.
As noted, the antenna also provides a ground so just insulating the radio body isn't enough. My TR3A has a negative ground radio in a positive ground chassis, but I insulated the radio body and the antenna and fused the ground wire. I was verrry careful to mount it securely and it has been fine for 20+ years but probably not the solution for everyone.
I put a neg ground JVC radio/CD player in my pos. ground Healey. It was intalled in a plastic mounting case (sold at most car stereo stores) and was then attached under the glove box, totally isolated. I also purchased a radio antenna that is a small plastic box about 4 inches long X 3/4 inch wide, with a lead that plugs in the radio antenna in jack, and a double lead for power. It attaches to the windshield by double edge tape. Antenna requires power (hot or pos lead taken from car chasis and neg lead from the ignition switch just like the radio was installed. Both the radio and antenna are totally isolated from the chasis, except for the necessary hot lead. You must also be careful to isolate the speakers from the chasis, to insure that the hot/positive power does not touch the speaker and return to the radio ground. One little mistake and you will be purchasing a new radio.
OP
Guest
Guest
Guest
Offline
Actually I found a positive/negative radio on eBay (with a small switch) from BMC. I hope to receive it somewhere comming week /ubbthreads/images/graemlins/smile.gif I have seen several offers for such radios on eBay so that's a good place to look.
Andy Blackley
Jedi Trainee
Offline
Another option is to find and install a period radio that can be easily switched from + to - ground. One such manufacturer is Blaupunkt. I have a vintage Blaupunkt Frankfurt in my 69 MGB and I love it. These are for sale all the time on Ebay.