MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Recommendations

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG TD TF 1500 - Jeffers' Regulator Adjustment

It seems as if my 15 year old Bob Jeffers solid-state regulator needs a bit of tweaking. The output voltage seems to have drooped. There are two adjustments on the board. I recall a conversation with Bob a long time ago where he mentioned that the output voltage is adjustable. Anybody happen to know any more about the procedure? TIA, Bud
Bud Krueger

1)What is the value of the output voltage?

2) The output voltage will normally vary with temperature.
As we get into the warmer weather it will fall off.

That is normal.

Jim B.
JA Benjamin

Perhaps one adjustment is for the cut out, the other output? Maybe post a picture and maybe someone with electronic knowledge can help. How is the knee doing? George
George Butz

Haven't done any serious, quantitative, work on it yet, Jim. Seems to be providing about 12 volts on the battery when the ammeter is at zero. Reving up to over 2,000 shows about 13 volts. The battery's only about a month old. My gut feeling is that, after 15 years it's time for a tweak.

Knee's coming along, George. Still some pain. Daily trips to the Y (Mon-Fri). Concerned about some 'clunking' going on in the joint. Scheduled to see Dr. Erens in a couple of weeks.

Bud
Bud Krueger

Bud - Jerry Felper in southern California knows all the ins and outs about Bob Jeffers regulator. Contact Jerry at: felperg@earthlink.net or 714-630-1074
Cheers - Dave
D.W. DuBois

Thanks, Dave. I'll contact Jerry. Bud
Bud Krueger

I've heard from Jerry and should be working on it later today. Here's an image of the workings of a bob Jeffers regulator, ca., 2005. Bud

Bud Krueger

The one Bob did for me about 10 years ago failed. I had a new microprocessor one built by Mecha-Tronics in North Carolina. Reasonable price, quick turn around. So far it works very well. info_please@vintagemecha-tronics.com (407) 765-2780.

I'll send a picture as soon as I figure out how to shrink it.
Bob McLeod TD 5618

here is the picture

Bob McLeod TD 5618

I manufactured my own using the "Holden Design" never had any trouble. Check my posts in the Archive.
G Evans

Bob, did they save the design for you? It might be a nice resource to get on the TTalk page for other folks wanting another option/source.

Alex
Alex Waugh

Alex, there isn't a webpage about Bob Jeffers' solid-state regulator on Ttalk. The closest that there is is a link to a monthly column that I wrote for The British Marque in November 2005 entitled "A Pointless Tech Session" about solid-state devices in our cars.

I have no personal history with Vintage Mecha-Tronics devices, though I've known the Ahrendt's for quite a long time. I'm sure that their devices are top-of-the-line. Perhaps I can write something up about regulator options open to Tcar folks nowadays. How many of you are aware of Jerry Felper's British Auto Electric?

I'll see what I can do. Bud
Bud Krueger

This thread was discussed between 29/05/2017 and 01/06/2017

MG TD TF 1500 index

This thread is from the archives. Join the live MG TD TF 1500 BBS now