On Sat, 18 Dec 2010 09:40:19 -0500, K9sqg wrote: >Jim's point is well taken. On the L7 and L75, as well as other ham equipment, >it can overheat if it is placed on a thick carpet or if there are papers >underneath; in the latter case, the partial vacuum will lift the paper up and >block some of the inlet grill.
FWIW, it was mentioned that you can't see that the filaments are lit in the L-7 with the cover on. Well, actually you can. The way the tubes are positioned, if you peek under the bottom of the amp from the front, you can see the glow of the filaments through the air intake slots. 73 -Jim -- Ham Radio NU0C Lincoln, Nebraska, U.S.S.A. TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! "Give a man a URL, and he will learn for an hour; teach him to Google, and he will learn for a lifetime." HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ http://radiojim.exofire.net http://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
