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Older DoorKing Model 1834 Entry System turn “Tone Open” sound off

PaulPNW

Feb 23, 2020
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Feb 23, 2020
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We have an older DoorKing 1834, and several of the residents near the gate would like us to turn the “Tone Open” sound off. DoorKing tech support and the Owner’s Manual say this feature is only available on revision K and later, and we have revision E. Does anyone know of a workaround or hack to turn the “Tone Open” sound off? We can’t simply disconnect the speaker as that would also disable the intercom. Thanks.
 

ChosunOne

Jun 20, 2010
462
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Jun 20, 2010
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@PaulPNW, davenn's comment was to trigger a flag to me so I'd look at this thread. I have decades of experience as a security alarm tech, amd somewhat less experience working on institutional telephone entry systems.

I've worked on a number of DoorKing systems, the 1834 among them, but I've never been called on to hack or kludge turning the "Tone Open" sound off. I'm afraid I don't have anything more for you than tech support had. Sorry. :(
 

PaulPNW

Feb 23, 2020
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Feb 23, 2020
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Ah, got it, thank you davenn and ChosunOne. There are pots on the circuit board that control speaker volume, mic volume, and feedback, so I guess we'll try to turn the speaker volume down to lower the "Tone Open" volume enough to satisfy the residents but still loud enough to be able to use the intercom. New circuit boards are fairly expensive just to be able to turn the "Tone Open" off. Any additional input would be welcome.
 

73's de Edd

Aug 21, 2015
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3,437

Sir PaulPNW . . . . .


You say . . . .
I don't understand your comment?

" OH, our almighty Chosun One ! " . . . . .is just merely being our on site resident security and alarm specialist . . . GURU . . .. whose main claim to fame occurred way back in civil war days when he incorporated and initated coin operated access to outdoor privvies /toilets . . . . MUCH to the chagrin of "anxious" local residents . Where, sometimes " I gotta run " actually meant " I GOTTA RUN ! "
Typically he, quite admirably, fields and supplicates this specific line of questioning.

In the interim, may I now also feel you out, in respect to more specific particulars of this special situation.

Seems like you are being in a gated situation where the access gate and its call box is receptive of a tenents code and then responds with a confirming TONE, and an initiation of the opening of the gate.
Now does this tone remain ALL of the full time untill the gate completely recloses ?
I can see the tone frequency probably being in the 400~ range ( Circa middle C ) and in these COLD -DENSE AIR times, that it might carry sound farther than if being in warm . . . .thinned air . . . .July -August times.

BUT, now with cold times, the house would normally be shut down tightly at nights . . . .acoustically. ( Unless this is a Bedouin community with tents. )
I know that I would not hear it, if being next door to it, at neither 11PM nor 2 AM by an errant tenants return, with my house being so acoustically tight / soundproofed..

Most call box/entry panels I encounter, would do well to be having a small 4 in speaker crammed inside of them . . . even more likely a 3 to 3.5 in size speaker.
So unless the speaker box cavity also resonates sympathetically, to enhance the 400 ~ tone frequency, it seems to not exactly be getting a PA speaker output level, besides, the tone is just an acknowledgement of access code confirmation and then gate activation.

Seems like the solution would be the taking of the one hot speaker feed line and let it feed into a built up tone decoder *** which will differentiate only to a 400~ tone and then immediately activate a relay driver circuit to open the same line, which also feeds the speaker. The result is instant speaker silence until the tone stops after the gate cycling. That gives a resultant full normal intercom use .EXCEPT for gate opening, now would anyone wanting or being in need of use of the intercom to the keyboard box at those brief blips in time ?

If a supplemental "notification" of gate operation / duration acknowledgement was needed,to replace the now missing tone, a visible light with flashing action could be wired into the gate activation motor circuitry.
Since, I perceive this to probably be just a night time / wee hours situation.


Datasheet Refwencing . . . . . (a la Elmer Fudd )

*** NE567 Datasheet . . . .
http://web.mit.edu/6.115/www/document/lm567.pdf


RELEVANT SCHEMATIC . . . . . .

and its install, which involves the opening of one wire of the speaker feed line and connect it to the fixed contact of the SPDT relay contacts that is normally having the moveable relay armature contact resting against it while being unenergized.

You either use DC power from a plug in wall wart or observe the main board schematic to see if there is a constant 12VDC supply which could be voltage dropped down to 9 V . . .via 3 term regulator or zener diode + cap filtering for the meager 9 V power requirements of this circuitry.
The speaker therein functions as normal, then, only when a 400 ~ ? tone comes down that audio line, the decoder circuitry circuitry detects it and pulls in the relay contact to disrupt the speaker connection . . . . . for the duration time of that tone .
Then all is restored back to normal . . . . . all, awaiting for the next itenerant wine-0 to come curb bumping in at 3:36 AM..

upload_2020-2-24_2-6-0.png

Thaaaaaaaaaaassssssit . . . . .


73's de Edd . . . . .



NEED TO KNOW . . . . . INFO
The measured speed of time . . . . . . has now been precisely calculated as being one second per second.

.
 

PaulPNW

Feb 23, 2020
4
Joined
Feb 23, 2020
Messages
4
What an entertaining and brilliant response and solution! Those tone decoders are literally a dime a dozen, and as a fellow ham, building this circuit board with relay is no big deal, so I think this would work just fine, thank you so much.
 
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