[RTTY] Help with keeping RF out of PC

[Jeff Stai WK6I]

1. there was something a while back about setting the sound card priority to 
'highest' as a way to prevent MMTTY lockups.

2. return the cables to their former rats nest glory - nice straight (or 
even worse, coiled) cables attract RF - every time I try to make the cables 
neat, bad things happen - randomness seems to cancel things out. 
Re-randomize until it works again.

your grounding scheme is (from your description) identical to mine - I also 
put everything on heavy duty surge protectors, for what it is worth.

...and my cables are a disaster...;-)

hope this helps! - jeff wk6i

At 11:04 AM 1/10/2005, Peter Laws wrote:
>On Mon, 10 Jan 2005, Jerry Flanders wrote:
>
>> I would first see if it ACTUALLY is due to RF - turn off the power to the
>> radio and run a (simulated transmission) test to see if it still locks up.
>
>The problem is that it's not consistent.  I did make over 250 QSOs, after 
>all.  After re-initing the MMTTY Engine the radio would sometimes get 
>stuck in xmit ... but not always.  I did notice that when I turned the 
>radio back on that it would retune even though I hadn't changed frequency.
>
>
>> If it is due to RF, moving those cables around could have been the 
>> culprit - you might have disturbed a ground connection.
>
>I'll check, but I don't think so.  All the radios go to a copper bar and 
>the bar is connected through the patch panel to an 8' ground rod not 10' 
>from the station itself.  The computer is only grounded through the 3-wire 
>plug so I'm not sure what else I could do there.  I'm thinking that it's 
>more like some kind of proximity thing.  Maybe make sure all the audio is 
>as far from the RF as possible.
>

--
Jeff Stai               jds at twistedoak.com
Twisted Oak Winery      http://www.twistedoak.com/
Rocketry Org. of CA     http://www.rocstock.org/
Amateur Radio           WK6I