[Amps] AL-811 & 572's

[Carl]

The 572B is a plug in replacement that offers a higher Pd and reliability in 
an 811A amp including the venerable Collins 30L1. Ameritron has recommended 
the swap in their amps along with the transformer ratings caveat.

The slight difference in interelectrode capacity is of no consequense.

Carl
KM1H




----- Original Message ----- 
From: "Thomas F. Giella NZ4O" <nz4o at tampabay.rr.com>
To: "amps @ COL" <amps at contesting.com>
Sent: Saturday, January 22, 2011 7:53 AM
Subject: Re: [Amps] AL-811 & 572's


> Thanks for the input guys. I'm aware of the limitations of the power 
> supply
> on the AL-811. I was looking for performance information about the 572B 
> tube
> itself.
>
> 73 & GUD DX,
> Thomas F. Giella, NZ4O
> Lakeland, FL, USA
> nz4o at tampabay.rr.com
> John 3:16 <><
>
> NZ4O Solar Space Weather And Geomagnetic Data Archive: http://www.nz4o.org
> NZ4O Daily LF/MF/HF/6M Radiowave Propagation Forecast:
> http://www.solarcycle24.org
>
>
> ----- Original Message ----- 
> From: "Thomas F. Giella NZ4O" <nz4o at tampabay.rr.com>
> To: "amps @ COL" <amps at contesting.com>
> Sent: Friday, January 21, 2011 12:50 PM
> Subject: [Amps] AL-811 & 572's
>
>
>>I have an AL-811 running 572B's instead of 811's. The manual says for RTTY
>> mode to use a maximum of 150 ma on the grid and 400 ma on the plate for
>> the
>> 811's.
>>
>> What would be the maximum grid and plate current that I could use on the
>> 572B's on RTTY?
>>
>> 73 & GUD DX,
>> Thomas F. Giella, NZ4O
>> Lakeland, FL, USA
>> nz4o at tampabay.rr.com
>>
>> NZ4O Solar Space Weather And Geomagnetic Data Archive: 
>> http://www.nz4o.org
>> NZ4O Daily LF/MF/HF/6M Radiowave Propagation Forecast:
>> http://www.solarcycle24.org
>>
>>
>> _______________________________________________
>> Amps mailing list
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>
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