[Amps] Attenuator needed

[Vic K2VCO]

I need about 10w drive for my 813's, so the 6 db attenuator will bump this up to 40w, 
dissipating 30w. That should be fine, especially since it will be used for CW.

On 11/15/2010 1:33 PM, Larry Benko wrote:
>    Vic,
>
> Be careful as the attenuators are rated for dissipation and not power
> input. Therefore a 50W 3dB attenuator is usable with a 100W input where
> a 50W 6dB attenuator is only usable with a 66.7W input.  Hopefully that
> works fine for you.  Also you might have duty cycle on your side
> depending on the mode of transmission you use.
>
> 73,
> Larry, W0QE
>
> On 11/15/2010 2:06 PM, Vic K2VCO wrote:
>> Thanks! I just ordered the 6 db version. Lots of interesting stuff there.
>>
>> On 11/15/2010 12:54 PM, Jim Barber wrote:
>>> Henry radio has been selling some Florida RF attenuators on fleaBay for
>>> reasonable prices.
>>>
>>> http://cgi.ebay.com/New-50-Watt-Hybrid-30-dB-50-ohm-Attenuator-/390115387682?pt=LH_DefaultDomain_0&hash=item5ad4b06922
>>>
>>> If that URL doesn't work, find Henry Radio's eBay store and use the
>>> search term attenuator in the in-store search box.
>>>
>>> I've bought several Florida RF parts from them recently and have been
>>> happy with the transactions.
>>>
>>> 73,
>>> Jim N7CXI
>>>
>>> On 11/15/2010 12:38 PM, Vic K2VCO wrote:
>>>> I made a 6 db attenuator for the input of my grid-driven amplifier in order to bring the
>>>> drive requirement up a bit and to provide a better SWR for the exciter during tuning. I
>>>> used some film resistors from Mouser. I suspect that these have a low voltage rating,
>>>> because one of them shorted after a few minutes of 10-meter operation. They didn't show
>>>> any sign of heating, so I think it was a voltage/frequency issue and not simply overheating.
>>>>
>>>> Anyway, I need a 50-ohm attenuator that can dissipate about 40 watts and can be used at
>>>> HF. Anything from 3 to 6 db will work. I had a Henry solid-state amp that had a couple of
>>>> these, which bolted to the heat sink. Does anyone know where I can buy such a thing, or
>>>> how to make one from reasonably priced parts?
>>> _______________________________________________
>>> Amps mailing list
>>> Amps at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps

-- 
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/