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



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

_______________________________________________
SHARE THE FUN: JOIN THE COLLINS COLLECTORS ASSOCIATION TODAY !
http://www.collinsradio.org/membership/


 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)



_______________________________________________
SHARE THE FUN: JOIN THE COLLINS COLLECTORS ASSOCIATION TODAY !
http://www.collinsradio.org/membership/


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)







This archive was generated by a fusion of Pipermail (Mailman edition) and MHonArc.