[Heathkit] SB-200

[WA3GIN in Alex. City, VA]

500 watts is a lot for that old amp.  The tubes would have to be very fresh.
A more reasonable output might be 300-400 watts key down.  This is a one KW
amp.  60% tube efficiency.  2000volts X .5 amp - 1KW input X .60 = 600 watts
output.  If we used 2400volts the output would be 720 watts and in 45 yrs
I've never heard of a SB-200 putting out that type of power.  This is a 1KW
PEP amp.

73,
dave
wa3gin


-----Original Message-----
From: heathkit-bounces at mailman.qth.net
[mailto:heathkit-bounces at mailman.qth.net] On Behalf Of KB9GKC at aol.com
Sent: Tuesday, July 25, 2006 6:37 PM
To: pgondos at hotmail.com; Heathkit at mailman.qth.net
Subject: Re: [Heathkit] SB-200

 
In a message dated 7/25/2006 6:25:55 P.M. Central Daylight Time,  
pgondos at hotmail.com writes:

My  problem is I can only get 1900V on the meter when in HV 
position. Manual  says 2400V. Any suggestions ? Thanks.


Hello,
 
 The HV meter may not be accurate, the volt meter is not a lab  instrument 
and could be +/- 10% off.  And the movement may have been  damaged over the 
years from being moved around.
 
Apply drive to the amplifier and see if you get 500 watts or so output, if  
so you know the tubes and power supply are in good shape.
 
73 and good luck,
Douglas
Heathkit SB-101A 
SteppIR 3 element at 60 feet
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