[Drake] Drake L4B Plate voltage

[WQ9E at btsnetworks.net]

Rick,

Jim Garland W8ZR has a nice writeup on using a SS relay to take the load from the switch.  I did this for all 3 of my Drake amps (L-4, 4B, and 7):  http://www.w8zr.net/vintage/amplifiers/Drake%20L4B%20Modification/Drake%20L-4B%20Modification.htm

Rodger WQ9E

-------- Original Message --------
> From: richard radke <rar100 at excite.com>
> Sent: Sunday, November 27, 2011 5:47 PM
> To: John King <k5pgw at yahoo.com>
> Subject: Re: [Drake] Drake L4B Plate voltage
> 
> Sounds 'bout right....1800-1900V in CW/Tune...btw, speaking of  
> L4B's,I re-built my on/off switch today (been out for a couple of  
> years) easier than I expected...workes great now...sorry I waited so  
> long
> 
> Rick
> W9WS
> 
> 
> 
> On Nov 27, 2011, at 4:46 PM, John King wrote:
> 
> > My Drake L4B has been sitting unused for about three years. Today,I  
> > replaced the blower wheel on the blower and have it fired up. Since  
> > I haven't been using it, I have become unfamiliar with the meter  
> > readings.
> >
> > My line voltage here,I suspect is about 240 vac because the the  
> > other shack voltage is 120vac. My question is, what plate voltage  
> > should I see on the L4B volt meter? It appears to be about 2,700  
> > vdc in the SSB position. Does that sound about what it should be?
> >
> > Your experience with the normal plate voltages for the L4B will be  
> > appreciated , John, K5PGW
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