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1. converting radio to pos gnd (score: 1): Author: Unknown; Date: Tue, 02 Mar 1999 15:56:12 -0800; Does anybody have any notes on converting a negative ground TR radio to positive ground? My '63 TR4 came with a POC aftermarket radio which I removed when I started my restoration 18 years ago. I've; /html/triumphs/1999-03/msg00133.html (7,400 bytes)
2. Re: converting radio to pos gnd (score: 1): Author: Unknown; Date: Wed, 3 Mar 1999 12:25:45 +1100; It would be very dificult to convert a radio internally. One solution is to completely insulate the frame of the radio so that the polarity of the radio is no longer important. The ground wire can th; /html/triumphs/1999-03/msg00140.html (8,615 bytes)
3. RE: converting radio to pos gnd (score: 1): Author: Unknown; Date: Tue, 2 Mar 1999 18:00:53 -0800; Most car radios also have the antenna grounded both at the antenna mount and at the radio. I once saw an MGA catch fire because it had the "cross-wired" solution suggested by Trevor ! (no fuse in the; /html/triumphs/1999-03/msg00143.html (9,898 bytes)
4. Re: converting radio to pos gnd (score: 1): Author: Unknown; Date: Tue, 02 Mar 1999 20:06:32 -0700; I did this conversion on my TR many years ago and have had no problem. May have been easier on a TR3 as the radio is hump-mounted, don't recall where they are on a TR4. As was noted elsewhere, I had; /html/triumphs/1999-03/msg00147.html (8,026 bytes)
5. RE: converting radio to pos gnd (score: 1): Author: Unknown; Date: Wed, 3 Mar 1999 14:02:44 +1100; Good point, so the antenna case has to be insulated from the vehicle as well (or find one with a plastic case). The speaker leads could also become a hazard as could short circuits from metal knobs a; /html/triumphs/1999-03/msg00149.html (10,592 bytes)
6. converting radio to pos gnd (score: 1): Author: Unknown; Date: Wed, 3 Mar 1999 13:03:51 -0600; From "Zempel, David W" <> Can't easily be done, as there are many polarity sensitive componets in them, electrolytic capacitors, diodes, transistors, etc. Would be much easier to convert the car to n; /html/triumphs/1999-03/msg00197.html (8,225 bytes)
7. RE: converting radio to pos gnd (score: 1): Author: Unknown; Date: Thu, 04 Mar 1999 07:24:40 -0800; Thanks, I printed it out yesterday afternoon. Is it strange that I haven't gotten any recommendations to NOT convert to neg. ground? Is there any good reason not too? Dave.; /html/triumphs/1999-03/msg00240.html (8,974 bytes)
8. Re: converting radio to pos gnd (score: 1): Author: Unknown; Date: Thu, 04 Mar 1999 18:23:08 -0800; Hi Dave, Have you considered converting the entire car to negative ground and leaving the radio alone? I would think that would be easier. It would also make simpler the addition of any other negativ; /html/triumphs/1999-03/msg00264.html (8,980 bytes)
9. Re: converting radio to pos gnd (score: 1): Author: Unknown; Date: Thu, 04 Mar 1999 20:01:24 -0700; I know of no technical advantage to + ground, think I even heard that - ground cars were less prone to rust. I still maintain my TR with + ground just because -- for me -- this is, along with points; /html/triumphs/1999-03/msg00269.html (8,149 bytes)
10. Re: converting radio to pos gnd (score: 1): Author: Unknown; Date: Thu, 4 Mar 1999 22:03:59 EST; You forgot about the negative-grounded Triumph "Plug-in--the-cigarettelighter-airpump" for the "Triumph inflatable bisexual rally companion", and, of course his/her reversible-polarity vibrator for t; /html/triumphs/1999-03/msg00270.html (7,816 bytes)
11. Re: converting radio to pos gnd (score: 1): Author: Unknown; Date: Thu, 4 Mar 1999 22:31:44 EST; good Dave, No (excluding originality concerns). Virtually every auto manufacturer that had been using a positive ground system swapped to negative ground in the same general time frame as Triumph, an; /html/triumphs/1999-03/msg00272.html (8,324 bytes)
12. Re: converting radio to pos gnd (score: 1): Author: Unknown; Date: Thu, 4 Mar 1999 23:51:43 -0800 (PST); My dad's theory (after driving a Vauxhall, Austin, and EnFo on many a night) was that on foggy days / nights, the + ground cars would have their electrons sucked out by all the - ground cars in the v; /html/triumphs/1999-03/msg00277.html (8,868 bytes)
13. RE: converting radio to pos gnd (score: 1): Author: Unknown; Date: Fri, 05 Mar 1999 08:06:30 -0800; Now that's an excuse I'm used too. The fact that I started restoring my TR4 about 18 years ago ought to drive that point home. Dave.; /html/triumphs/1999-03/msg00294.html (8,381 bytes)
14. Re: converting radio to pos gnd (score: 1): Author: Unknown; Date: Fri, 05 Mar 1999 21:49:24 -0800; Mine was a Lucas NOS/positve ground, she shorted out about a year ago, was off & on for about 5 years before that. Just a bit of an overcharge at some point, I think. Out here in Calif., we call em "; /html/triumphs/1999-03/msg00335.html (8,357 bytes)

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