[MRCA] Mystery Project

[Christopher Bowne]

If you have 572Bs they are plug and play subs for 811s - just have a hjgher plate dissipation rating.  I’ve been running a pair of them in my ART-13, removed from my OOC SB-200 amp since I lost an 811 snd didn’t have a spare at the time.

73 de Chris AJ1G

Sent from my iPhone

> On Sep 15, 2025, at 22:51, B. Smith via MRCA <mrca at mailman.qth.net> wrote:
> 
>  I was running short of 811s and operate primarily CW.
> Subbed light bulbs for the tubes to keep the 813 lit.
> k4che
> <k4chekeyer.gif>
> 
> 
> http://k4che.com/ART-13%20WO%20811s/ART-13%20Without%20811%27s.htm
> 
> <bulb sub.JPG>
> 
> <bulb sub.JPG>
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