Author Topic: FOR SALE == Tone Generator Stand-Alone for you phone  (Read 706 times)

Offline ramegoom

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FOR SALE == Tone Generator Stand-Alone for you phone
« on: June 18, 2018, 11:21:48 AM »
$37 shipped to US address.

The circuit, tested and calibrated, is now available. It requires 9-24VDC input, and puts out a 1v. P-P square wave dial tone. You can install this 2x3" circuit into your phone, and attach a 12v. "wall-wart" supply to its inputs. Whenever you pick up your display phone, you'll get a dial tone! It can also be used with an internal 9V battery, and wired to the hook switch so when it's on hook, the circuit is off - this way your demo phone will be self-contained.

The circuit uses a built-in power supply regulator and consumes very little power.

Here's the finished part. Let me know if you're interested.


Offline Dan F

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Re: FOR SALE == Tone Generator Stand-Alone for you phone
« Reply #1 on: June 19, 2018, 11:35:05 PM »
Can you provide an mp3 file of the tone?

Offline ramegoom

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Re: FOR SALE == Tone Generator Stand-Alone for you phone
« Reply #2 on: June 20, 2018, 07:45:47 AM »
I'll get something together. It's the classic tone, 350Hz and 440Hz paired, and it's adjustable. Each tone individually adjusts so if you prefer another sound, it can be set easily.

Offline Key2871

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Re: FOR SALE == Tone Generator Stand-Alone for you phone
« Reply #3 on: June 20, 2018, 11:17:13 AM »
That sounds interesting. Could one use it to impose a tone in say a switch board?

Offline ramegoom

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Re: FOR SALE == Tone Generator Stand-Alone for you phone
« Reply #4 on: June 20, 2018, 11:20:31 AM »
^^That's the plan....

Offline TelePlay

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Re: FOR SALE == Tone Generator Stand-Alone for you phone
« Reply #5 on: June 20, 2018, 12:17:36 PM »
That sounds interesting. Could one use it to impose a tone in say a switch board?

     GLOBAL MODERATOR POST

REF (originating topic):     http://www.classicrotaryphones.com/forum/index.php?topic=20307.0
            John . . .

              

Offline Weco355aman

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Re: FOR SALE == Tone Generator Stand-Alone for you phone
« Reply #6 on: June 20, 2018, 08:26:39 PM »
do you know if this can be tuned to 600/120 Step x step D T
Phil

Offline ramegoom

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Re: FOR SALE == Tone Generator Stand-Alone for you phone
« Reply #7 on: June 20, 2018, 11:15:53 PM »
Should be within the range of the adjustments. If not, a simple resistor change will accommodate the tune. On the board, there are test points where you can attach your scope or frequency counter. You tune each output, and the net is a combination of both.