Just got to the computer. Yes, the 77 I think came with a Jennings
RJ1A for QSK though the HC1 is interchangeable with it. The Corsair
has two outputs for an amp but I don't want to use a slow relay as
the "Ext-T/R has. I mainly want to use this on CW but the rare ssb
might get in there as well.
73,
Gary
KA1J
> I was mistaken on the A77. It seems it is a QSK amplifier. It has
> a
> Kilovac HC1 vacuum amplifier, but that keys from 26vdc. I guess
> it's time
> to read the manual!
>
> I thought the Corsair also had relay keying.
> Must have been one of the earlier Omni's.
> I remember having it in some Ten-Tec rig.
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt am Main)
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of
> GARY HUBER
> Sent: Friday, January 03, 2014 3:26 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] Corsair II & Alpha
>
> 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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