Duane,
I thought I remembered that the OLD Alpha amps use open-frame T/R relays,
but I was wrong - at least for the 77. The manual says it uses an HC-1. If
it had been openframe, then you would need some hang delay when keying it.
The Orion provides this, but I don't know if the Corsair does or not.
Yes the high-end Yaesu radios incorporated the Ten-Tec-like keying
circuitry, and so did Acom.
73 - Rick, DJ0IP
(Nr. Frankfurt am Main)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Duane
Calvin
Sent: Saturday, January 04, 2014 4:35 AM
To: 'Discussion of Ten-Tec Equipment'
Subject: Re: [TenTec] Corsair II & Alpha
Just FYI - Works fine with my Orion and Alpha 99. Not sure why the Corsair
II wouldn't, but it may not have the same keying circuit as the Orion (which
shared, I believe, the Omni VI/VI+ circuit. In fact, didn't I hear that
Yaesu copied the same keying loop architecture? OK, so I've moved from
specifics to generalities - not a prudent approach, I agree.
73, Duane
Duane Calvin, AC5AA
Austin, Texas
www.ac5aa.com
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Barry N1EU
Sent: Friday, January 03, 2014 11:16 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Corsair II & Alpha
>From my own experience, I would strongly discourage any attempt at getting a
Ten-Tec keying loop (TXEN/TXOUT) to work with a non-TenTec amplifier.
73,
Barry N1EU
On Fri, Jan 3, 2014 at 9:25 AM, GARY HUBER <glhuber@msn.com> wrote:
> My Corsair II manual says the EXT T/R jack is derived from a set of N.O.
> contacts on the auxiliary relay. (DO NOT USE to SWITCH 120/240V line)
> When operating SSB the drop out delay is switched out......
>
> The QSK jack is is open collector switched by the transmit (T) signal.
Will
> sink 100 mA w/ 0.6 V drop.
>
> There is also a QSK mod for Corsair and Corsair II at
> http://tentecwiki.org/lib/exe/fetch.php?media=corsair_qsk_mod.pdf
> which
uses
> the keying loop method. I made the modification to my near end of
> production Corsair II and use it with my Titan 425. By using a set of
> DPDT contacts with the common set running to my Titan 425, the NO to
> my
OMNI-VII
> and the NC to my CORSAIR-II, I can quickly switch the radio driving
> the
> Titan-425 while inhibiting the TX of the off-line TXCVR.
>
> You may want to check with TT regarding QSK TX delay for the Corsair
> II,
but
> it seems to me it was 10 milliseconds.
>
> 73 ES DX,
> Gary -- AB9M
>
>
> -----Original Message----- From: Rick - DJ0IP / NJ0IP
> Sent: Friday, January 03, 2014 2:49 AM
> To: 'Discussion of Ten-Tec Equipment'
> Subject: Re: [TenTec] Corsair II & Alpha
>
>
> Need more info.
>
> Which mode(s) are you running.
> With SSB there is only one issue, with CW there may be more.
>
> I never owned a Corsair II but I believe it has a switchable AMP-KEY line.
> I believe you can choose between keying with a transistor or keying
> with a relay.
> It is quieter to key with the transistor, but if the voltage or
> current requirements of the PA's relay are higher, you MUST use the
> relay, not the transistor.
>
> Also, current Alpha amps use vacuum relays but I believe the 77 used
> open frame relays.
> This means it is not capable of following QSK keying.
> I don't know if the Corsair has any built in "hang" on its amp-key
> line,
but
> I doubt it.
> In this case you can solve the problem by buying the Model 318 Amp Key
> and using its hang delay.
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt am Main)
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Gary
Smith
> Sent: Friday, January 03, 2014 7:55 AM
> To: tentec@contesting.com
> Subject: [TenTec] Corsair II & Alpha
>
> Are there any issues running directly from QSK out on the Corsair II,
> to
the
> relay in on the Alpha PA-77 series?
>
> Thanks & 73,
>
> Gary
> KA1J
>
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