Author Topic: Elektrisk Bureau PAX SXS with drums  (Read 8497 times)

Offline dsk

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Re: Elektrisk Bureau PAX SXS with drums
« Reply #15 on: March 23, 2015, 04:02:19 AM »
This design are from approx wwi but it works, and are just implemented as my home telephone system. The outbound calling are still a problem, and does only work on the shortest lines. My son noticed at once the different ringing, 25Hz vs 20Hz :-)

dsk

Offline dsk

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Re: Elektrisk Bureau PAX SXS with drums
« Reply #16 on: March 23, 2015, 01:19:19 PM »
The ringing tone are depending on the ringer current, my "modern" phones with more than 1000 ohms ringers does not draw enough current.  That is a problem I never have considered as a possible problem!

dsk

Offline dsk

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Re: Elektrisk Bureau PAX SXS with drums
« Reply #17 on: December 12, 2015, 09:38:24 AM »
How does the ring look?
Tried to catch some data via the PC sound card and the Visual analyzer (freeware), and here is the ring, generated by a vibrator, the cadence is controlled by a relay and capacitor:
dsk

Offline dsk

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Re: Elektrisk Bureau PAX SXS with drums
« Reply #18 on: November 12, 2018, 02:40:35 AM »
I had to give up my inward trunk.
 :(


dsk ;)

Offline dsk

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Re: Elektrisk Bureau PAX SXS with drums
« Reply #19 on: September 27, 2020, 03:16:10 AM »
Even the first trunk failed, but I have redesigned it and for the moment this is working for outgoing calls.

Offline dsk

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Re: Elektrisk Bureau PAX SXS with drums
« Reply #20 on: November 02, 2020, 06:36:03 AM »
I learn something all the time, but that the ringing sounds different depending on the other end.

Here I have first an electronic ringer from 1980, then 2 old phones so they will draw pretty high REN load, and at last no load.
https://soundcloud.com/d_s_k-2/depending-on-ringerload
dsk