[Amps] Drake L4B

[Gary Schafer]

When installing new diodes don't forget to remove the diode equalizing
resistors on the boards.

73
Gary  K4FMX

> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
> Behalf Of Jim Zellmer
> Sent: Tuesday, February 06, 2007 9:52 PM
> To: amps at contesting.com
> Subject: [Amps] Drake L4B
> 
> I recently picked up a nice L4B with power supply, SN 1934.  The tube
> marking was pretty faded, but are Eimac 3-500Zs, date code 7115.  the
> amp and PS are real clean and look physically pretty good.  I have
> removed the two filter cap/ diodes boards from the PS.  I think the
> Sprauge caps are original.  They all reformed nicely and are showing
> less that 1 ma current at 450 volts.  I will likely change out the
> diodes for some 3A 1KV diodes and button things up.  Are there any other
> caveats, or issues that I should be looking for before I put this thing
> on line.  General comments on the L4B are welcomed.  I will be using the
> amp with my Drake B line twins.
> 
> 73
> 
> Jim Zellmer
> KA0VSL
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