RE: Howzat work then?

[Keith Doxey <ukha@xxxxxxx>]

Paul,

I will try and remember t  end you a ferrite ring to wrap the power cord
round.

Keith

-----Original Message-----
From: Paul Gordon [mailto:paul_gordon@xxxxxxx]
Sent: 02 July 2001 09:58
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Howzat work then?


I think that's the answer - I just did some testing with various other
PSU's
I had lying around, - one from a one-for-all IR repeater = same result, one
from an old Sony Discman, = well it sort of worked! - the audio transmits,
but it is of a drastically lower quality than when running off the battery.

Does this mean the problem is due t  poor quality rectification of the AC
sinewave t  DC? - could the el-cheapo wallwarts be doing half-wave
rectification only? If that's the answer, then presumably my Sony Discman
PSU must have been doing full-wave rectification, as the circuit works when
using this one, but it's a bit worrying that the audio quality was s  poor,
- is this likely t  occur with a "decent" PSU as well? - I'd hate
t  g  out
& spend £20 on a decent regulated PSU only t  have the same problem!

Paul G.



>From: Mike Griffiths <mike@xxxxxxx>
>Reply-To: ukha_d@xxxxxxx
>To: "'ukha_d@xxxxxxx'" <ukha_d@xxxxxxx>
>Subject: RE: [ukha_d] Howzat work then?
>Date: Mon, 2 Jul 2001 09:43:28 +0100
>
>I think Keith has the answer then as it does say Regulated PSU under
>circuit
>testing :-(
>I must admit I would have pugged up a wallwart t o
>
>Mike
>
>Sent from Home
>
>-----Original Message-----
>From: Paul Gordon [mailto:paul_gordon@xxxxxxx]
>Sent: Mon 02 Jul 01 09:38
>To: ukha_d@xxxxxxx
>Subject: RE: [ukha_d] Howzat work then?
>
> >Paul
> >Does the  wall-wart work anything else?
>
>Tests OK with the spare bulb from my Maglite.... (in fact I've got a
blind
>spot right in the middle of my vision 'cos it was s  bright!!!)
>
> >What happens if you run it at 9v?
> >
>
>The same, - the LED on the PCB comes on as it should, so the circuit
has
>power t  it, but ****-all is being transmitted...
>
>Paul G.
>
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____________________________________
Automated Home UK
http://www.automatedhome.co.uk
____________________________________

Your use of Yahoo! Groups is subject t  http://docs.yahoo.com/info/terms/