{Collins} Fw: 30L-1 / 572b

["Steve" <hockeyguy@xxxxxxxxxxx>]

I'm using Chinese 811A's with a new PS board & am getting an easy 700 watts 
out of my 30L-1.  Keep a close eye on Ebay though.  A month ago I was able 
to pick up 4 new Russian 811A's for $54!

Steve K2FW

----- Original Message ----- 
From: donroden@xxxxxxxxxx
Cc: collins@xxxxxxxxxxxxx
Sent: Saturday, June 27, 2009 10:09 AM
Subject: Re: {Collins} 30L-1 / 572b


If you don't want to push it, Penta Labs have new 811s for $16 each.
Four make 600-700 with 2000volts in standby.   I may eventually go to 572Bs
but ao far so good....

Don WA4NPL





Quoting "Ulrich Schneider" <schneider.ulrich@xxxxxxxxxxxx>:

> Hi to the list,
>
>
>
> I just bought a matched quad of 572B made by Svetlana from Keith (K5SVC) 
> via
> his ebay advertisement. I am enthusiastic about their behaviour in my 
> 30L-1:
>
> All parameters seem to be just fine, no adjustment was necessary at all!
> Other than the 811, their plates do not start glowing with just 100W(!) CW
> output and in addition to that the power has increased from around 600W to
> more than 700. I do not attempt to challenge the amp beyond that but this 
> is
> really convincing to make the change, especially considering the high 
> plate
> voltage I have, which is around 2000V in idle!
>
>
>
> As a summary it is highly recommendable to exchange the 811 to the 573B 
> also
> where the price of approx. 200 USD is very reasonable.
>
>
>
> Regards,
>
>
>
> Ulrich
>
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NETS: Tues & Thur: 3.805 MHz-2000 Central + Fri: 3.895 MHz-2000 Pacific
 SUNDAYS: 14.263 MHz-2000 UTC  +  AM Net: 29.050 MHz-1200 Central
 1st Wednesday AM Net 3.880 MHz-2000 local (ET, CT, MT, PT)