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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