[TenTec] Corsair II & Alpha

[Barry N1EU]

No, the Orion TX EN/TX OUT circuit is a complete redesign over the old
Corsair/Omni56 circuits.  The Orion complies with the generally
accepted qsk loop standards.  The Corsair/Omni is TenTec amp specific.
 I'm speaking about the TX EN/TX OUT keying loop outputs and not the
qsk/relay outputs for the Corsair - only the very latest production
Corsair II's incorporated the TenTec keying loop.

Barry N1EU

On Fri, Jan 3, 2014 at 10:35 PM, Duane Calvin <ac5aa1 at gmail.com> wrote:
> 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 at 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 at 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 at contesting.com] On Behalf Of Gary
> Smith
>> Sent: Friday, January 03, 2014 7:55 AM
>> To: tentec at 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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