Carl, you are correct, 50hz :(
On Wed, Apr 16, 2014 at 3:01 PM, Carl <km1h@jeremy.mv.com> wrote:
> You will likely be in a 50 Hz country so consider reducing power to keep the
> transformer happy AND bring a couple of muffin fans to help keep the RF and
> PS sides happy.
>
> Carl
> KM1H
>
>
> ----- Original Message ----- From: "Jeff Kinzli N6GQ" <jeff@N6GQ.com>
> To: "Alek Petkovic" <vk6apk@bigpond.com>
> Cc: "amps" <amps@contesting.com>
> Sent: Wednesday, April 16, 2014 5:45 PM
> Subject: Re: [Amps] AL572 for DXpedition, parts to take along
>
>
>> True, and if the spare parts list gets to be the size/weight of
>> another amp, that might be the better option - at least then its a
>> quick swap, and any parts needed are there for the taking...
>>
>> Although, in all reality, I have to assume that as a single-op, doing
>> much more than a tube swap in the middle of the contest is probably
>> not feasible, and much of these parts would only be in case the amp
>> fails pre-contest...
>>
>> Believe me, I'm arguing myself in and out of all sorts of scenarios :)
>>
>> 73 de N6GQ
>>
>> On Wed, Apr 16, 2014 at 2:41 PM, Alek Petkovic <vk6apk@bigpond.com> wrote:
>>>
>>> Starting to sound like a spare amp. :-)
>>>
>>> Alek. VK6APK
>>>
>>>
>>> On 17/04/2014 5:30 AM, Joe Subich, W4TV wrote:
>>>>
>>>>
>>>>
>>>> A full set of power supply caps and the equalizing resistors,
>>>> A spare set of rectifier diodes
>>>> (as an alternative - consider a complete power supply board)
>>>> spare set of parasitic suppressors
>>>> a spare metering board
>>>> The original T/R relay (in case f PIN diode failure).
>>>>
>>>> 73,
>>>>
>>>> ... Joe, W4TV
>>>>
>>>>
>>>> On 4/16/2014 5:11 PM, Jeff Kinzli N6GQ wrote:
>>>>>
>>>>>
>>>>> Hi all...
>>>>>
>>>>> I'm prepping for a trip to Africa and plan to take an AL572 (cheap,
>>>>> light, dispensable, plentiful, and does about 1200w out). While I
>>>>> realize there are better amp choices in terms of durability, etc. this
>>>>> is the one I've chosen with the above factors in mind. It is going to
>>>>> be the primary amp in an SO2R setup, and if it fails, I still have a
>>>>> secondary pretty solid (Acom) amp I can put into primary. I'll also
>>>>> have the QSK board installed. Over a week I'd expect to put about 150
>>>>> hard hours on the amp.
>>>>>
>>>>> So, if you were taking the AL572 with you to a place where parts are
>>>>> non-existent, and wanted to have a chance of keeping the amp online in
>>>>> 100+F heat in a rugged duty cycle (fast CW, fast SSB) what would you
>>>>> take? My plan is the following:
>>>>>
>>>>> - spare set of tubes
>>>>> - plate choke
>>>>> - a couple spare HV caps for the PS
>>>>>
>>>>> Are there other things that would be smart to take along? I'm thinking
>>>>> along the lines of what's reasonable to both take along, and field
>>>>> repair with - and while a spare set of tubes is marginal in that
>>>>> sense, it seems to me that at least with 572Bs it might not be a bad
>>>>> idea. Also any areas of the AL572 that are inherently weak?
>>>>>
>>>>> Anything else? I'd also be interested in hearing about any other mods
>>>>> folks would suggest to strengthen the amp for the long haul (I've seen
>>>>> the W8JI mods).
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Jeff N6GQ
>>>>> _______________________________________________
>>>>> Amps mailing list
>>>>> Amps@contesting.com
>>>>> http://lists.contesting.com/mailman/listinfo/amps
>>>>>
>>>> _______________________________________________
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>>>>
>>>
>>> --
>>> From sunny Binningup, Western Australia.
>>>
>>> Family Businesses:
>>> Petkovic Air& Gas. petkovicag@bigpond.com
>>> SP Electrical. www.spelectrical.net.au
>>> Hampers by Hand. www.facebook.com/hampersbyhand
>>>
>>> http://www.qrz.com/db/vk6apk
>>> http://www.qrz.com/db/vk6ap
>>>
>>>
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>>> http://lists.contesting.com/mailman/listinfo/amps
>>
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>
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