[VoIP] Oslo phone

[Steph Kerman]

Russ Price wrote:
> Well, it seems that sitting idle all day, connected to the channel 
> bank, did the phone some good - maybe the capacitor just needed to 
> re-form.
Only electrolytic capacitors are subject to reforming.  They do so in 
the presence of voltage, not the absence from it.
> The cap definitely says 0.5uF on it, and also has a 500V rating.
Interesting!  That's an unexpectedly high rating.  Does it look 
original?  What does Ralph Meyer say about ringing capacitor voltage 
ratings?
> Anyway, I was able to let it ring 20 times and not have it trip - 
> maybe I won't need to do any surgery on it.
It's been my experience that problems that go away mysteriously return 
mysteriously too.
> Meanwhile, I had one other recent acquisition - a Kellogg K1000 
> "Redbar" in beautiful shape. It has very little sidetone, but 
> otherwise works perfectly; the lack of sidetone doesn't seem to be a 
> problem.
Depends on what you connect it to.  If it happens to see an ideal 
terminating impedance in the exchange, which it very well could 
connected to a channel bank, the side tone ought to be low.  Make sure 
the transmit and receive levels are normal.

Steph
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