Very sweet. I collect WECO gear like 550/551/556 cordboards and Pre 1960s dial sets, including the earliest dial subscriber sets like the AA1, 102 and 200 series phones. I had a 1a2 key system in my house from high school until the late 1980s when Panasonic introduced the KXT616 analog PBX. My current favorite phone is a 102 w /subset Bluetooth linked to my iPhone, it even supports outbound pulse dialing through the iPhone.
Sent from my iPad 2 3G On Jun 30, 2011, at 22:14, David Forbes <[email protected]> wrote: > On 6/30/11 9:30 PM, Wayne de Geere III wrote: >> >> You must be a real phone fan to know that proper ring generation is at 20Hz, >> I'm impressed! >> >> On 2011 Jun 30, at 20:34 , David Forbes wrote: >> >>> I used to own an HP 201B audio signal generator. It was powerful enough to >>> ring a telephone bell, providing 100V RMS at 20 Hz. >> > > Yes, I am. I have an analog PBX in my house. > > I was building a cordless Western Electric 2500 desk set, so I needed to ring > the original bell with a 3.6V battery pack. I ended up rewinding the coil for > lower voltage and using a 555 timer oscillator feeding an H-bridge driver to > make it ring. It sounded exactly like the real thing. > > -- > David Forbes, Tucson AZ > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To post to this group, send an email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/neonixie-l?hl=en-GB. > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
