[Amps] Vacuum Relay Issues

[jerome schatten]

On Mon, 01 Dec 2008 19:00:16 -0800, Rick Stealey  
<rstealey at hotmail.com> wrote:

>
> Tom,

[...]

> But on the subject of sequencing. if you happen to be using FT1000MP  
> rigs (the only one I am
> familiar with so far) there is a menu setting for delaying rf after  
> the key closure.  In my
> case my vacuum output relay was switching in about 12 ms after the  
> transceiver gave
> it the key signal, so I delayed the MP by 15 ms.  Others have said  
> vacuum relays should
> close in the 3-5 ms range, and if I could get mine to do that I  
> would be able to shorten
> the delay and maybe get away with QSK.
> Do you have a dual channel scope to make the timing measurements  
> with?  It would be
> interesting to see if Emtron is sequencing them properly, but even  
> if they are you
> still don't want your driver slamming it with RF before that time is  
> complete, even if it
> is 3-5 ms.  Someone told me an Icom 756Pro III did not have an  
> adjustment, but I
> haven't confirmed that.
>
> Rick  K2XT

It's sad but true, the Pro3 does NOT have a QSK delay control to delay  
the RF envelope. Does your QSK delay work if you're not using the  
internal keyer in the FT1000? It doesn't on my FT920.

Jerome - VA7VV