Author Topic: WE 307 A/C  (Read 433 times)

Offline markosjal

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WE 307 A/C
« on: November 18, 2020, 08:33:00 PM »
I just took delivery of some phones from NH Telephone museum .


One is marked on bottom as 307 A/C

I connected it to a line to hear only faint sounds. I then cracked open the case to find an odd component that I never have seen before . It is just in front of the bell and marked "RET 266A" and  "2V47" or possibly the date of "2/47" I have no idea what this component is but looks like a coil.

Does anyone here kow what this is?




Can this phone be re-wired to work normally?



________________________________________ ____


EDIT

307 is apparently a unit wired for local battery
« Last Edit: November 18, 2020, 10:40:10 PM by markosjal »
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Offline Jack Ryan

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Re: WE 307 A/C
« Reply #1 on: November 18, 2020, 10:09:32 PM »
It would be a local battery telephone - probably for long line service.

Jack

Offline Jack Ryan

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Re: WE 307 A/C
« Reply #2 on: November 18, 2020, 10:11:47 PM »
Can this phone be re-wired to work normally?

It has the wrong IC for CB operation but if you add a battery it should work properly.

Jack

Offline markosjal

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Re: WE 307 A/C
« Reply #3 on: November 18, 2020, 10:38:25 PM »
IC??? Integrated circuit? Probably means Inductor?
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Offline Jack Ryan

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Re: WE 307 A/C
« Reply #4 on: November 19, 2020, 12:02:11 AM »
IC??? Integrated circuit? Probably means Inductor?

Induction coil.

Jack

Offline markosjal

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Re: WE 307 A/C
« Reply #5 on: November 19, 2020, 01:11:59 PM »
So it seems my options are to replace the Coil (and capacitor too) , which the coil an be purchased here 
https://www.ericofon.com/catalog/parts/networks.htm

Or

figure out how to wire it for local battery and see if a dial can be added on local battery phone

I think there may be an issue connecting a dial to a local battery phone  , so the second option may be the better one.
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Offline paul-f

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Re: WE 307 A/C
« Reply #6 on: November 19, 2020, 02:08:10 PM »
Search the forum for "307" and you'll find several good past discussions.

Also, the BSPs help. Some BSP numbers to check can be found here:
http://www.paul-f.com/we300typ.htm#307
« Last Edit: November 19, 2020, 09:00:51 PM by paul-f »
Visit: paul-f.com         WE 500  Design_Line

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Offline poplar1

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Re: WE 307 A/C
« Reply #7 on: November 19, 2020, 05:34:56 PM »
 "307A/C" indicates that it can be either manual (A) or dial (C). This is not a "local battery telephone" -- rather, it is Common Battery Signaling, Local Battery Talk. The battery is needed because of the long loop.
"C'est pas une restauration, c'est une rénovation."--François Martin.

Offline Babybearjs

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Re: WE 307 A/C
« Reply #8 on: November 19, 2020, 05:51:18 PM »
I have several of these along with the matching 357 wall sets. they can be converted to common battery. some rewiring is required. no parts need to be removed.  refer to the BSP wor wiring diagrams and take note of the jumper located under on of the screws on the induction coil... that ties the coils together. if you want to more details, just ask.
John

Offline Jack Ryan

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Re: WE 307 A/C
« Reply #9 on: November 20, 2020, 12:57:30 AM »
"307A/C" indicates that it can be either manual (A) or dial (C). This is not a "local battery telephone" -- rather, it is Common Battery Signaling, Local Battery Talk. The battery is needed because of the long loop.

Well, that is a local battery telephone but it is why I suggested connecting a battery and then it will work. There is no picture so I don't know if the phone has a dial or not.

Long line telephones were very often LBT-CBS.

I should add that there are zillions of 302s and not many 307s. I would not change it.

Jack

Offline Babybearjs

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Re: WE 307 A/C
« Reply #10 on: November 20, 2020, 02:13:35 AM »
enclosed is a copy of the schematic and conversion instructions, try it and see if you like it that way, I've done this to all of my 307's and 357's. that way, thay are usable on todays phone lines.
John

Offline markosjal

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Re: WE 307 A/C
« Reply #11 on: November 21, 2020, 02:08:14 PM »
Thanks, I found that diagram in its origial form and made the following from it!
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Offline Babybearjs

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Re: WE 307 A/C
« Reply #12 on: November 30, 2020, 01:40:19 AM »
so, there was conversion instructions already out.... I didn't even know they had this practice. I'll have to reference it for future use!
John