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
>>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>
> --
> 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
>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|