What is robot relay ?
----- Original Message -----
From: "elstar-mt" <elstar@elstar.fi>
To: <tentec@contesting.com>
Sent: Wednesday, November 05, 2003 05:51
Subject: [TenTec] Titan 425 & TT Transceiver QSK
> I wish to exchange experience on TT QSK.
> When I had Corsair II and Paragon with 425 , QSK was perfect.
> Between dots and dashes the big and slow Vacuum relay was silent and got
> active
> only between words on over 250 mS abt. cap on keying.
>
> On Omni VI and Orion I have problem on QSK.
> K4 / Vacuum relay is activating on every dot and dash keeping voice and
> life time is getting shorter that way.
>
> I have connected KEYing Loops with two RCA as in Instruction manuals and
> tried even
> 3rd RCA cable on VOX/PTT - AMP1
>
> Original Relay K4 and my modification relay makes same.
> I have changed Vacuum relay to faster and more silent "robot relay" which
> takes
> only 20% of delay compared to vacuum relay and is also more silent.
> Vacuum relay is sensitive for cool hamshack ( below 50 F ) .
>
> I have done self QSK amplifier using 4CX1000A / same output as from Titan
> and
> QSK I made with same "robot" type relays ( 1,85- 1,90 mS / release
> 2,0-2,25 )
> It was perfect.
> Using Tetrode , it´s quite easy.
>
> I wish your experience and advise ; Mark OH3LX.
>
>
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