The Ford Barn

hotrodA · 07-02-2017, 07:02 PM

I picked up this generator ($10) at Asheville, mainly for the front fan mount, and the seller said the oblong cutout was for radio equipped cars. Can anybody confirm, or add anything about it?
Thanks!

petehoovie · 07-02-2017, 07:14 PM

The seller was correct in his description of the cutout.

lotsagas4u · 07-02-2017, 07:15 PM

I always thought that one was the Heavy Duty version.

Bob C · 07-02-2017, 07:27 PM

Could be 68-10505 step voltage regulator and cutout assembly all 8 cyl police or bus 1932-37.

Bob

hotrodA · 07-02-2017, 08:00 PM

Thanks for the responses. He did say it was off a 37

petehoovie · 07-02-2017, 08:12 PM

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Bob C got it right. My 1934 Ford service Bulletin refers to Voltage Regulator 40-10505 which consists of the standard cut-out and a coil shunted relay. It's a two contact/two wire voltage regulator. However, the picture in the service bulletin does not show an external wire connection as shown in hotrodA's post. Wiring to the voltage regulator was made to two screws (armature and field) on its underside. My 1934 Restoration Manual says the oval/oblong shaped cut-out was used on cars equipped with accessory radios....We might be talking about two different units here sharing a similar looking case....

cas3 · 07-02-2017, 11:57 PM

so if infact it was for a radio, its still just a cutout, and not a regulator, it must have some noise suppression bonus ?

petehoovie · 07-03-2017, 01:49 AM

Quote:

Originally Posted by cas3

so if infact it was for a radio, its still just a cutout, and not a regulator, it must have some noise suppression bonus ?

Looking at the voltage regulator schematic, there is no circuitry for static suppression. In fact, a picture in the radio service bulletin shows an external capacitor for static suppression attached to one of the mounting screws the voltage regulator uses on top of the generator....

Terry,OH · 07-03-2017, 05:41 AM

It is called "Two Rate" It can have the generator charge at two different levels. It is not a true regulator, still a cut out. Is the Ford name stamped into the top and any other identification such as an A or B or BB? These stamping help to identify the various years. All the noise suppression for a radio is in addition to the cut out by using additional condensers.

koates · 07-03-2017, 06:34 AM

Exactly correct Terry,OH. It is a two step charge relay. When the fitted radio set was turned "ON" then the generator fields were connected directly to ground through one pair of contacts for a higher charge rate because these glovebox or centre control radios draw around six amps. With the radio "OFF" the generator fields were connected through the other contacts and a series resistor to reduce the charge rate of the generator to a lower setting. This was internally sensed using the current winding inside the reg. The base charge rate was still adjusted with the third brush. These oval cut outs were introduced in Jan. 1934 and made obsolete after Jan. 1936 and generally only used when cars were fitted with radios. They gave trouble and Ford mechanics did not always have the tech ability to set them properly and many were replaced with the normal round Ford cut out. They are fairly scarce today and bring good prices. Mechanics and electricians still don't understand how to set them up even today. Regards, Kevin.

Bob C · 07-03-2017, 10:46 AM

There is a good explanation of this two rate relay with pictures and diagrams
in the March 1934 Service Bulletins.

Bob

07-02-2017, 07:14 PM	#2
petehoovie Senior Member Join Date: May 2015 Posts: 8,403	Re: Generator cutout ID? The seller was correct in his description of the cutout. __________________ The only thing nice about being imperfect is the joy it brings to others.... *"Silver rings, your butt! Them's washers!"* "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 Last edited by petehoovie; 07-02-2017 at 08:17 PM.

07-02-2017, 07:15 PM	#3
lotsagas4u Senior Member Join Date: Apr 2011 Location: Plainview, Texas Posts: 757	Re: Generator cutout ID? I always thought that one was the Heavy Duty version.

07-02-2017, 07:27 PM	#4
Bob C Senior Member Join Date: May 2010 Location: So Cal Posts: 8,793	Re: Generator cutout ID? Could be 68-10505 step voltage regulator and cutout assembly all 8 cyl police or bus 1932-37. Bob

07-02-2017, 08:00 PM	#5
hotrodA Senior Member Join Date: May 2010 Location: Rogersville, TN Posts: 802	Re: Generator cutout ID? Thanks for the responses. He did say it was off a 37

07-02-2017, 08:12 PM	#6
petehoovie Senior Member Join Date: May 2015 Posts: 8,403	Re: Generator cutout ID? Sponsored Links (Register now to hide all advertisements) Bob C got it right. My 1934 Ford service Bulletin refers to Voltage Regulator 40-10505 which consists of the standard cut-out and a coil shunted relay. It's a two contact/two wire voltage regulator. However, the picture in the service bulletin does not show an external wire connection as shown in hotrodA's post. Wiring to the voltage regulator was made to two screws (armature and field) on its underside. My 1934 Restoration Manual says the oval/oblong shaped cut-out was used on cars equipped with accessory radios....We might be talking about two different units here sharing a similar looking case.... __________________ The only thing nice about being imperfect is the joy it brings to others.... *"Silver rings, your butt! Them's washers!"* "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 Last edited by petehoovie; 07-02-2017 at 08:50 PM.

07-02-2017, 11:57 PM	#7
cas3 Senior Member Join Date: Jan 2011 Location: sw minnesota Posts: 4,598	Re: Generator cutout ID? so if infact it was for a radio, its still just a cutout, and not a regulator, it must have some noise suppression bonus ?

07-03-2017, 05:41 AM	#9
Terry,OH Senior Member Join Date: May 2010 Posts: 4,785	Re: Generator cutout ID? It is called "Two Rate" It can have the generator charge at two different levels. It is not a true regulator, still a cut out. Is the Ford name stamped into the top and any other identification such as an A or B or BB? These stamping help to identify the various years. All the noise suppression for a radio is in addition to the cut out by using additional condensers.

07-03-2017, 06:34 AM	#10
koates Senior Member Join Date: May 2010 Location: Melbourne Australia. Posts: 2,082	Re: Generator cutout ID? Exactly correct Terry,OH. It is a two step charge relay. When the fitted radio set was turned "ON" then the generator fields were connected directly to ground through one pair of contacts for a higher charge rate because these glovebox or centre control radios draw around six amps. With the radio "OFF" the generator fields were connected through the other contacts and a series resistor to reduce the charge rate of the generator to a lower setting. This was internally sensed using the current winding inside the reg. The base charge rate was still adjusted with the third brush. These oval cut outs were introduced in Jan. 1934 and made obsolete after Jan. 1936 and generally only used when cars were fitted with radios. They gave trouble and Ford mechanics did not always have the tech ability to set them properly and many were replaced with the normal round Ford cut out. They are fairly scarce today and bring good prices. Mechanics and electricians still don't understand how to set them up even today. Regards, Kevin.

07-03-2017, 10:46 AM	#11
Bob C Senior Member Join Date: May 2010 Location: So Cal Posts: 8,793	Re: Generator cutout ID? There is a good explanation of this two rate relay with pictures and diagrams in the March 1934 Service Bulletins. Bob