[Amps] Eimac AS-47 2m 8877 amp?

[PY1NB - Felipe Ceglia]

Hi Jeff and all,

K9EA sent me a private message about this. I failed to notice something
very obvious. C5 spring and the shaft tube should be sandwiched with the
chassis between them.

Jeff, please let me know how did you treat teflon to accept the glue.

73,

Felipe Ceglia - PY1NB
-------------------------------------------------------------------------------------
PR1T team member /// Rio DX Group member /// Araucaria DX Group member
http://dxwatch.com /// http://reversebeacon.net /// http://riodxgroup.com


On Fri, Jan 18, 2013 at 5:08 AM, jeff millar <wa1hco at wa1hco.net> wrote:

> Used one for years for our VHF Contest group and rebuilt it several times.
>
> C5 is a flat copper plate about 10 cm wide and 5 tall.  It has flexible
> brass sheet on each end that wraps back to ground to the aluminum box.  The
> brass is U shaped and acts as a spring to suspend the flat plate.  The tube
> has a copper ring that connects to the anode lines and has another flat
> sheet of copper soldered to it to make the plate.
>
> I glued teflon sheet (treated to make it glue-able) to the tune and load
> plates to avoid dramatic events if the tuning every got too aggressive.
>
> Look at http://www.qsl.net/dl4mea/**2g35.htm<http://www.qsl.net/dl4mea/2g35.htm>for a similar design using a GS35.
> Also look at http://www.nd2x.net/base-1.**html<http://www.nd2x.net/base-1.html>for a bunch of designs.
>
> jeff, wa1hco
>
>
> On 01/17/2013 05:40 AM, PY1NB - Felipe Ceglia wrote:
>
>> Hello,
>>
>> Has anyone here ever built such an amp?
>>
>> I'd like to see pictures of its internals, if possible.
>> I am not sure how C5 connects to ground, seems like the brass tube would
>> fit and move directly to a hole in the aluminum chassis?
>>
>> Here is an AS-47 reprint: http://6mt.com/wpo2kwamp.htm
>>
>> 73,
>>
>> Felipe Ceglia - PY1NB
>> ------------------------------**------------------------------**
>> -------------------------
>> PR1T team member /// Rio DX Group member /// Araucaria DX Group member
>> http://dxwatch.com /// http://reversebeacon.net /// http://riodxgroup.com
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