I looked at the schematic of the 77 and it is spread out over several pages
- so it's tough to follow all the way through in just a few minutes. There
is a "keying circuit" so my hunch is that even though its relay uses 26v, it
probably has 12v keying to the external world. It probably says somewhere
in the manual.
The version I downloaded has each page on a separate jpeg image, so it's a
pain to try and study.
If my hunch is correct and it does key with 12v, then the Corsair will work
just fine with it.
73 - Rick, DJ0IP
(Nr. Frankfurt am Main)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Gary Smith
Sent: Saturday, January 04, 2014 2:31 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Corsair II & Alpha
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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