[TenTec] Corsair II & Alpha

Sat Jan 4 09:21:48 EST 2014

Correct - as far as I know, the TX EN/TX OUT circuit (Omni 6+ and
earlier) is worthless on any non-TenTec amplifier.

Even the mod that Acom published for many years for the Omni 6+ keying
loop was worthless on Acom amps.

73, Barry N1EU

On Sat, Jan 4, 2014 at 8:16 AM, GARY HUBER <glhuber at msn.com> wrote:
> Barry, the modification
> http://tentecwiki.org/lib/exe/fetch.php?media=corsair_qsk_mod.pdf was
> provided by TenTec for the earlier (pre 41A10019 SN) Corsairs and
> Corsair-IIs and does use the TX EN / TX OUT keying loop method. It’s a very
> simple mod on a Corsair II and no drilling is required (if you are willing
> to give up a couple AUX 12 VDC jacks on the back of the CORSAIR-II).
>
> Are you saying the TX EN / TX OUT keying loop mod absent the delay and hang
> circuits is not the same as that on the later TT radios?
>
>
> 73 ES DX,
> Gary -- AB9M
>
> -----Original Message----- From: Barry N1EU
> Sent: Saturday, January 04, 2014 5:07 AM
>
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] Corsair II & Alpha
>
> 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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