SB-102 Resoration - Part Needed

[Glen Zook]

The "plate" meter shunt (which actually reads cathode
current) is comprised of the 12 ohm resistors in
parallel from the cathode connections of the 6146
tubes to ground.  The 1 meg resistor changes the meter
into basically a voltmeter.

Mouser has 5% 1 meg resistors in a 3 watt version but
I don't see anything else in their catalogue over 1/2
watt in the 1 meg size at a 1% or better tolerance. 
The cost of the 5% resistor is 45 cents in single
quantities and the part number is 66-GS31001004-J. 
Mouser is at http://www.mouser.com

The size of the meter in the SB-104 is so small that
you can't tell a 5% variation in the reading.  If you
want the higher wattage then go with the 5% and you
will never know the difference.

Glen, K9STH


--- Jim Flanagan <jflan at TAMPABAY.RR.COM> wrote:

The SB-102 uses a 1 Meg (1W, I think), 1% resistor in
the metering circuitry for monitoring the PA plate
current.  I need to find a new resitor to replace this
resistor.  Preferably, I would like a 2W version for
better stability.  Anyone know where I can easily find
one of these resistors? 

Glen, K9STH

Web sites

http://home.comcast.net/~k9sth
http://home.comcast.net/~zcomco


	
		
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