[hpsdr] Hermes question -- amplifier keying

[John Ackermann N8UR]

Thanks, Mike!  I'd been looking in places like the AnanCTL so needed 
steering into the right direction.  Appreciate it.

73,
John
----

On 5/31/2013 7:29 AM, Mike Seguin N1JEZ wrote:
> Hi John,
>
> I hadn't seen a response... but the delays are under Setup | Options in
> PowerSDR. PTT delay, MOX Delay RF Delay.
> Also under Setup | Transmit there is VOX delay if you use it.
> Finally under Setup | DSP | Keyer there is a Break In delay.
>
> 73,
> Mike, N1JEZ
> "A closed mouth gathers no feet"
>
> ----- Original Message ----- From: "John Ackermann" <jra at febo.com>
> Sent: Thursday, May 30, 2013 5:49 PM
> Subject: Re: [hpsdr] Hermes question -- amplifier keying
>
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Thanks, Mike.
>>
>> With the ANAN-10 I have the drive I need, but I'm wondering about the
>> keying timing as you suggest.
>>
>> I know that the PowerSDR with the Flex hardware supported various
>> sequencing delays in the configuration tabs.  Is something like that
>> available in PowerSDR for the HPSDR hardware?  If it's there, I've
>> missed it.  Seems like it would be very helpful to be able to specify
>> a turn-on delay for the exciter, and a turn-off delay for the keying
>> output.
>>
>> 73,
>> John
>> ----
>>
>> Mike Collins said the following on 05/26/2013 11:02 PM:
>>> Hi John and Jeff,
>>>
>>> I bought Jeffs 418 amp from him and have been using it quite a bit.
>>>
>>> I built a 5W driver amp (RD16) for boosting up the Hermes level for the
>>> TenTec 418.  I initially used the
>>> Hermes amp key output to drive both the driver and 418 keying inputs.
>>> The 5W driver I built was very quick
>>> to turn on so had some faults (no damage) detected by the 418 circuits.
>>> Using the Hermes to drive the 418 keying
>>> input; and using the 418 output (delayed as you noted) to drive the 5W
>>> driver amp did fix the faults.   This works great other than if
>>> I only want to use the 5W driver (for remote antenna tuner) becuz the
>>> 418 doesn't pass the keyline thru when turned
>>> off.   The final solution for me was to add a small RC time constant on
>>> the 5W driver keying circuit and go back to the Hermes
>>> driving both amp keying circuits...  now I can run 5W or the full 75W
>>> from the TenTec 418 (no need for the 418 keying output).
>>>
>>> Also reverse engineered the serial control interface on the 418 and
>>> wrote a small patch to the firmware that lets me use
>>> the Hermes Apollo connector to auto band switch the 418 amp.  This all
>>> works really good and can go anywhere with the
>>> amp auto switching as I change bands in PowerSDR.
>>>
>>> If you or anyone wants/needs the 5W driver schem or RC delay
>>> circuit.....or the firmware patch to control a TenTec 418; just drop me
>>> a email.
>>>
>>> 73,  Mike Collins   KF4BQ
>>>
>>> On 5/26/2013 9:52 PM, Jeff Kelly wrote:
>>>> ***** High Performance Software Defined Radio Discussion List *****
>>>>
>>>> I used 2 and 25 on the breakout cable from Hermes and it worked fine
>>>> keying the 418.  (make sure you have the corrected pin #'s)
>>>>
>>>> Jeff
>>>> K2SDR
>>>>
>>>>
>>>>
>>>> -----Original Message----- From: John Ackermann
>>>> Sent: Sunday, May 26, 2013 9:35 AM
>>>> To: HPSDR List
>>>> Subject: [hpsdr] Hermes question -- amplifier keying
>>>>
>>>> ***** High Performance Software Defined Radio Discussion List *****
>>>>
>>>> I'm probably going to be bother the list a few times over the next week
>>>> or so as I try to get my portable Hermes station ready for a trip to
>>>> northern Michigan.  I'll post these questions separately to keep any
>>>> threads organized.
>>>>
>>>> I'm using a TAPR-built Hermes with the Apache Labs 10W amp and
>>>> enclosure, so it looks like an ANAN-10 to PowerSDR.
>>>>
>>>> The 10W output is driving a Ten-Tec 418 amp (5-10W in, 100W out). The
>>>> 418 has both a key-in and a key-out line.  If I read the documentation
>>>> correctly, the key out has a 4ms delay on keying to avoid hot
>>>> switching.
>>>>
>>>> Question -- should I simply use the Hermes key-out line to drive the
>>>> 418
>>>> and count on the Hermes TX sequencing, or is it worthwhile to send PTT
>>>> to the 418 key-in and let the 418 key-out drive Hermes?
>>>>
>>>> Thanks,
>>>>
>>>> John
>>>
>>
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>
>

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